Pearl Home Certification: Leading the Way to High Performance
CategoriesSustainable News Zero Energy Homes

Pearl Home Certification: Leading the Way to High Performance

A Platinum-level Pearl Certification renovation in Long Island, NY, prioritized both comfort and cost savings. The homeowners installed heat pumps, ENERGY STAR certified windows and doors, advanced cellulose-dense insulation, as well as solar panels. Smart home technology helps them manage energy and monitor savings

Tracking home improvements

The journey towards a more sustainable, comfortable, and valuable home can be long and complex. In his renovations, Woodcock said he primarily takes advantage of Pearl Points, a scoring system designed to help homeowners recognize and track high-performing assets and potential improvements. “The scoring system is sort of addictive,” Patrick says. “By that, I mean it’s like the way you want to reach the next level in a video game.”

Pearl’s multiple certification levels present your home’s overall performance, Silver, Gold, and Platinum. Plus, it deep-dives into specific categories of assets:

  • Building Shell, including insulation
  • Heating & Cooling systems
  • Baseload appliance energy use
  • Home Management, like smart thermostats and dashboards
  • Solar, EV & Energy Storage

A home that doesn’t reach Pearl Silver (yet!) can qualify for Pearl Asset Certification, highlighting one or more high-performing features: high-performance windows and doors, heat pumps, ENERGY STAR appliances, etc. Assets that interact more with your local climate will earn more points. For instance, a high-efficiency air conditioner will be worth more points in Phoenix than in the Midwest.

This helps identify the most impactful home upgrades, from temperature and humidity control to reducing energy bills and resilience in the face of climate change, including well-being issues like indoor air quality. These “hidden” systems have no curb appeal but do represent valuable, long-lasting home investments.

The Green Door app will recommend priority tasks and update your plan as you bring assets online, earning Pearl Points toward higher home certification. Maintenance reminders help you ensure your investments continue to save on your energy bill and retain their value. Finally, the app stores the documentation and warranties on upgraded systems.

To achieve Gold-level Pearl Certification, this renovation in Phoenix included solar panels, AeroSealing, an EV charger, and ENERGY STAR certified appliances.

Contractor connection

Jan Green, a realtor and certified eco-broker, transformed her 1979 dilapidated Phoenix home, purchased in 2015, into a net-zero, energy-efficient residence, earning a Pearl Gold Certification. “A lot of people probably don’t know this—I certainly didn’t—but if the contractor who does your energy audit is also a certified contractor, with the capabilities to handle whatever fixes or replacements the audit revealed, it’s fairly standard practice for them to waive the cost of the energy audit as long as you contract with them for services,” said Green.

Homeowners can access Pearl’s network of contractors through the Green Door app. Importantly, any work done by a Pearl Contractor is automatically Pearl Certified upon successful completion. This ensures that the improvements contribute towards the home’s certification and overall value.

Green began with an energy audit, and then step-by-step upgraded her home with efficiency renovations: air sealing, LED lighting, energy-efficient appliances, and solar panels. She was able to offset some costs with a 26% federal tax credit and state incentives. Her approach aligns with the Inflation Reduction Act’s (IRA) incentives for high-performing home improvements. Homeowners can determine which specific funds are available for different upgrades utilizing Pearl’s IRA Rebates Calculator.

Looking to sell?

Pearl hosts a nationwide network of real estate agents who are trained to identify and certify high-performing home features. They can then leverage the marketing materials provided with Pearl Certification to highlight a home’s high-performance qualities and capitalize on their added value.

More and more new homes include high-performing features. And as more cities adopt stricter energy codes, this is where the market is headed. An eco-savvy real estate agent can ensure you get the most value for your efficiency renovations by optimizing the green fields in MLS databases and filling out the Appraisal Institute’s Green and Energy Efficient Addendum. They know how to market individual energy efficiency, home automation, and solar features, as well as connect whole-home performance to value and comfort.

Home certification is a gateway to a higher standard of living and a testament to the value of sustainability investments in our homes. In an evolving real estate market, Pearl Certification recognizes what’s already working and helps unlock the full potential of our homes to create a better, greener future.

Reference

Adean Studios’ overhauled High Country Motor Lodge nods to astronomy
CategoriesInterior Design

Adean Studios’ overhauled High Country Motor Lodge nods to astronomy

An old roadside motel on America’s iconic Route 66 has been renovated by San Francisco-based Adean Studios to reflect the culture and enviromnent of Flagstaff, Arizona.

Adean Studios worked with local architecture studio Synectic Design to overhaul the High Country Motor Lodge, which is operated by Marc & Rose Hospitality.

Hotel lounge with dark blue walls and amber lighting
Dark blue walls and amber lighting set the tone inside the High Country Motor Lodge lobby lounge

The mid-century property is accessed directly off the historic, cross-country Route 66 highway that runs through Flagstaff – the city that provides a base for visitors to the Grand Canyon, the Arizona Snowbowl ski resort and miles of hiking trails through the surrounding wilderness.

Almost 7,000 feet (2,100 metres) above sea level, the city is also home to the Lowell Observatory where Pluto was discovered in 1930.

Self-check-in desk as viewed in a mirror
The hotel was renovated by Adean Studios to reflect the landscape and history of Flagstaff

All of these elements were combined as influences for the hotel’s design, which lands somewhere between a mountain lodge and a retro motel.

“Our goal was to incorporate the rich astronomical history of Flagstaff, while also creating an environment that blends elements of a retro 1960s lounge with modern mountain design,” said Adean Studios principal Alexa Nafisi-Movaghar. “The entire property showcases a darker colour palette accented with rustic woods and 1960s-inspired fixtures and furnishings.”

Guest room with double bed, blue wainscoting and white upper walls
Guest room interiors are a cross between mountain cabins and retro motel rooms

Painted midnight blue, the hotel buildings form a U shape around a central lawn and a large swimming pool, which was also renovated as part of the project.

The lobby, restaurant and other public areas face the highway, while the majority of guest rooms are located in perpendicular two-storey blocks behind.

Guest room with low cushioned seating beside a double bed
Low furniture and cassette players add to the nostalgic atmosphere

On the west side of the site, three new shingle-clad cabins were constructed to house larger suites, bringing the total number of keys to 123.

The dark facade colours continue inside the lobby, lounge and bar areas, where a variety of seating types and configurations allow guests to dine or relax as they choose.

Dark green bathroom with lighting above a mirror, shelves and sink
Dark green and blue hues throughout the property nod to the forested surroundings and night sky

Amber-hued glass light fixtures emit a soft, warm glow in these spaces, while velvet curtains and blankets were included.

The bar and lounge opens onto a stepped outdoor terrace, where more dining tables and low chairs are arranged around a series of fire pits.

Motel rooms surrounding a central lawn and swimming pool
The property is arranged around a central lawn, which public events are held, and a large renovated swimming pool

A general store off the reception area sells a curated selection of snacks, merchandise and other locally sourced gifts.

In the guest rooms, navy blue wainscoting wraps the lower portion of off-white walls, and dark wood floors and low furniture add to the mid-century aesthetic.

Shingle-clad cabins beyond wooden tables and chairs
Three shingle-clad cabins that house suites were built as part of the project

Each is equipped with a cassette player and a set of three tapes, which play tracks that evoke nostalgia for the road trip era.

High Country Motor Lodge also boasts a Nordic spa, comprising two private wood-lined saunas that guests can reserve for one-hour sessions.

These cabins are accessed from an enclosed courtyard with an outdoor shower and fire pits, and have direct access to the hot tub for further relaxation, or the swimming pool for a cold plunge.

“Inspired by the local lifestyle of adventure-seekers, day-sleepers, and night-watchers, the great lawn, private cottages, and the Nordic Spa have been designed to enhance the outdoor experience, constantly reminding guests of the beautiful nature that surrounds,” Nafisi-Movaghar said.

Arched gateway with "The Sauna at HCML" written above
The hotel has a Nordic spa that guests can book for private experiences. Photo by Landon Kroeger

The hotel’s branding was created by Charleston-based SDCO Partners, and also plays up the retro and astronomy themes.

“Nestled between the Grand Canyon and Barringer Crater, the High Country Motor Lodge is at once both celestial and earthly, and the brand design honors both,” said creative director and founding partner Amy Pastre.

Hot tub with steam coming off it
The sauna cabins are located close to the hot tub. Photo by Landon Kroeger

“An eclectic family of hand-rendered typographic and illustrative graphic elements celebrate the motor lodge’s vintage style, contemporary design, and the love of high desert adventure.”

A range of public programming is organised at the location throughout the year, including theatrical performances, and a folk music festival in the fall.

Wood-lined sauna with benches and a water bucket
The private saunas can be reserved for an hour. Photo by Landon Kroeger

Many former motels and motor lodges across the US have been bought up and renovated into boutique accommodations over the past decade.

From Hotel Joaquin in Laguna Beach and The Drifter in New Orleans, to Scribner’s in New York’s Catskills Mountains and Tourists in the Berkshires, these hotels are often designed with a location-specific twist.

The photography is by Werner Segarra, unless stated otherwise.

Reference

Monitoring ecosystem restoration in high resolution 
CategoriesSustainable News

Monitoring ecosystem restoration in high resolution 

Spotted: The World Economic Forum’s (WEF’s) new initiative, Giving to Amplify Earth Action (GAEA), seeks to raise $3 trillion (around €2.7 trillion) every year to scale and replicate successful conservation and restoration projects around the world. Helping to connect people and organisations running the projects with funders and other supporters is the Restor network. 

Restor provides analytic support and a global network of individuals, agencies, and companies whose goal is to support restoration at scale through collaboration and sharing of best practices. Scientists provide insight and help project managers apply the latest research to each conservation or restoration site.  

Conservationists seeking information on a particular plot of land can use Restor’s expertise and access to satellite imagery to assess land cover, annual rainfall, levels of carbon in the soil, and biodiversity. Satellite imagery is available from up to 10 years in the past, and project teams can add data and photos to track the progression of a site’s restoration.  

The platform includes a searchable map of projects, divided into categories of tree nurseries, botanical gardens, seed banks, offices, suppliers, educational centres, and wells or pumps. There are more than 130,000 projects across 140 countries, and interested parties can set up a personal or organisation-level account to connect with the many others around the world – including funders and subject area experts – working towards healthier, sustainable environments. 

Fintech is providing a range of innovative solutions to the climate crisis, with innovations spotted in Springwise’s archive including a startup helping organisations assess the financial value of biodiversity and a platform supporting farmers through the transition to regenerative agriculture.

Written By: Keely Khoury

Reference

Creative Collaboration: When Architecture Meets High Fashion
CategoriesArchitecture

Creative Collaboration: When Architecture Meets High Fashion

The winners of this year’s A+Product Awards have been announced. Stay tuned for the year’s edition of the A+Product Awards ebook in the coming months.

Boundaries are intended to be pushed in the realm of design, and the incomparable creative synergy between fashion and architecture has proven to be an irresistible force. Over the years, this fusion of disciplines has given rise to many breathtaking collaborations that challenge the status quo as designers and architects join forces to create spaces that are as inspiring as they are functional.

Delving into the art of this creative alchemy, this article explores some of the most iconic partnerships in the world of design, each of which has birthed a masterpiece that is both an ode to their respective fields and a testament to the power of collaboration.


REM Koolhaus, OMA x Prada

Prada Los Angeles Epicenter by Rem Koolhaas and Ole Scheeren, Los Angeles, CA Photograph provided by OMA

While some collaborations are one-offs, undoubtedly adding to their allure, others become long-term relationships. Many deeper partnerships between fashion designers and architects are born of a mutually explored aesthetic or shared understanding of values and goals. In the case of Prada and OMA, their ongoing saga is indeed one for the ages.

Rem Koolhaas, the Pritzker Prize-winning architect and founder of the multi-disciplinary firm the Office for Metropolitan Architecture (OMA), has long been known for his innovation and daring vision. When he joined forces with Miuccia Prada, the matriarch of the eponymous Italian fashion house, the result was a series of architectural marvels, such as Seoul’s Transformer project and the Prada Epicenter in New York.

Prada Los Angeles Epicenter, by Rem Koolhaas and Ole Scheeren, Los Angeles, CA Photograph by OMA

This collaboration extended beyond bricks and mortar, as OMA and the AMO think tank began to redefine the very nature of the catwalk at Prada’s shows. The convergence of Koolhaas’s avant-garde design sensibilities and Prada’s penchant for bold self-expression has given rise to spaces and experiences that are as breathtaking as they are groundbreaking.


Lina Ghotmeh x Hermès

Like the early days of Prada and Koolhaas, the collaboration between French luxury goods manufacturer Hermès and Franco-Lebanese architect Lina Ghotmeh appears to be the beginning of a harmonious and hopefully long-established relationship. Having worked together previously to create stunning window displays for the brand, Ghotmeh has now been appointed for Hermès’ latest and largest architectural project to date.

Precise Acts – Hermès Workshops, France by Lina Ghotmeh Architecture. Render courtesy of Lina Ghotmeh Architecture.

Exemplifying the poetic marriage of craftsmanship and design that exists between the two design companies, Ghotmeh’s studio, Lina Ghotmeh Architecture, was chosen to design the new Hermès Leather Workshops, resulting in what looks to be a stunning space that seamlessly blends with the surrounding landscape while respecting the surrounding environment.

The all-brick construction, punctuated by large bay windows, bathes the space in natural light and evokes the precision and craftsmanship that have become synonymous with the Hermès brand. This poetic merging of form, function and broader ecological impact demonstrates the overlapping priorities across both industries.


Samuel Ross, SR_A x Acqua di Parma

Many collaborations between fashion designers and architects are grounded in retail design. Samuel Ross, founder of the streetwear label A-Cold-Wall* and design studio SR_A, has harnessed alternative skills to create new designs for the instantly recognizable Acqua di Parma bottles. While not technically an architect, Samuel is a creative polymath whose portfolio of work is deeply rooted in the semiotics and aesthetics of architecture.

His collaboration with the century-old Italian perfume house resulted in a reimagining of their iconic Colonia bottle. Drawing inspiration from the architecture of Milan and London, Ross’s designs featured a scaffolding-like window frame, a nod to the two cities’ post-WWII architectural dialogue. The result is a captivating reinterpretation that has bridged history and modernity in a way that celebrates both equally.


Marco Costanzi Architects x Fendi

Fendi HQ by Marco Costanzi Architects, Rome, Italy Photograph by Andrea Jemolo

While retail design is often the catalyst for cross-discipline collaboration in recent years, there has been a marked increase in fashion brands entering the realm of hospitality design — notably Fendi. The Italian luxury fashion house found an architectural soulmate in Marco Costanzi Architects when they embarked on a journey to reimagine their flagship store in Rome.

Fendi HQ by Marco Costanzi Architects, Rome, Italy Photograph by Andrea Jemolo

Located in the historic Palazzo della Civiltà Italiana, the store’s interior design is an ode to Fendi’s rich heritage while showcasing the forward-thinking ethos of Marco Costanzi Architects. The result is a sumptuous blend of materials, textures, and colors that pay tribute to both the brand’s history and the building’s architectural significance.

Above the store sits the Fendi Private Suites. Each suite is a celebration of the classic Fendi aesthetic – rich, neutral colors, crisp lines and hardwood floors. Walls are paneled in grey, polished wood and inset with Karl Lagerfeld’s black and white photos of Rome’s fountains, an ideal backdrop that brings out the subtle playfulness of custom Fendi Casa furniture. The building, store and suites are a haven for design and architecture enthusiasts.


Issey Miyake x David Chipperfield x Toshiko Mori x Frank Gehry and more

Reality Lab. Issey Miyake by TOKUJIN YOSHIOKA DESIGN, Tokyo, Japan Photograph by Masaya Yoshimura

Of the many fashion designers who have impacted architecture and interior design, the late Issey Miyake was the pinnacle. He was often referred to as a center of contemporary design culture and found a way to combine space and showcase into one unified experience by using his showrooms to further present his design thinking to the world. The iconic mastermind worked with a broad cross-section of architects to create unique, captivating environments. Over the years, their showrooms became a textbook example of retail design becoming an extension of a fashion brand’s vision and identity.

Issey Miyake Marunouchi by TOKUJIN YOSHIOKA DESIGN, Tokyo, Japan Photograph by Masaya Yoshimura

From as early as 1976 and his collaboration with a young Shiro Kuramata on the From First building in Aoyama, Japan, Miyake worked with many notable architects, providing younger or less experienced architects a global platform on which to showcase their talents.

David Chipperfield and Kenneth Armstrong designed his London showroom in 1985 with the architects using natural materials to evoke the spirit of Japanese architecture. Miyake then worked with Toshiko Mori on his first freestanding showroom at 77th Street and Madison Avenue in New York. Mori also designed a New York location for Pleats Please in 1998; another New York showroom for Miyake on 79th Street was finished in 2005.

Issey Miyake London by TOKUJIN YOSHIOKA DESIGN, London, UK Photograph by Masaya Yoshimura

Later, Miyake would enlist the skills of people like Ronan and Erwan Bouroullec, Ito Masaru Design Project and, of course, long-time friends Frank Gehry and Gordon Kipping. Together, they brought the iconic Issey Miyake Tribeca store to life. The store’s interior is a harmonious blend of Kipping’s urban sensibilities and Miyake’s signature folds, creating a space that is both a tribute to New York City’s architectural heritage and a glimpse into the future of design. With its dynamic, origami-inspired aesthetic, the store serves as a reminder of the potential unleashed when fashion and architecture intertwine.

With each collaboration, the importance of creative exploration and pushing boundaries is evident. By merging their respective disciplines, designers and architects can break new ground, challenge conventions, and redefine our understanding of design and style. The results of these partnerships are spaces that are not only functional but equally inspiring and transformative, demonstrating the limitless possibilities that arise from interdisciplinary collaboration.

The winners of this year’s A+Product Awards have been announced. Stay tuned for the year’s edition of the A+Product Awards ebook in the coming months.



Reference

Mass timber buildings can have high carbon emissions says Amy Leedham
CategoriesSustainable News

Mass timber buildings can have high carbon emissions says Amy Leedham

Mass timber’s reputation as the go-to low-carbon construction material is a problematic oversimplification that is leading to greenwashing, says carbon expert Amy Leedham in this Timber Revolution interview.

“We’re seeing a little bit of oversimplification and glorification of mass timber,” said Leedham, who is carbon lead at engineering consultancy Atelier Ten.

“The main thing that you see in the media, and one of the reasons it’s becoming such a popular building material, is that it can have a significantly lower embodied carbon than steel or concrete,” she told Dezeen. “I say ‘can’ because it’s not always the case.”

Wooden interior of John W Olver Design Building at the University of Massachusetts
Amy Leedham (top image) is carbon expert at Atelier Ten, an engineering firm behind buildings including the mass-timber John W Olver Design Building in Massachusetts (above). Photo by Albert Vecerka/Esto

Mass timber is a term for engineered-wood products – strong structural components that typically consist of layers of wood bonded together.

It is increasing in popularity in the construction industry due to wood’s ability to sequester carbon, which means timber generally has a lower embodied carbon when compared to materials such as concrete and steel.

However, according to Leedham, this has caused mass timber to become synonymous with carbon neutrality, leading to the fallacy that all “mass-timber buildings are carbon neutral” due to the stored carbon offsetting the emissions expended by them.

“Critical factors that need to be considered”

“Mass timber construction can definitely be an important pathway toward carbon neutrality, but there are other critical factors that need to be considered,” she told Dezeen.

“If it’s not done well, mass timber buildings can have very high carbon emissions, whereas concrete buildings can have quite low carbon emissions,” she said.

“We’ve worked on concrete projects with certain concrete suppliers where they’re really focusing on reducing emissions associated with the concrete mixes and those can have quite low carbon emissions. There’s no black and white, it’s all hues of grey.”

Render of the Portland Museum of Art extension
Atelier Ten has designed the mass-timber extension of the Portland Museum of Art with Lever Architecture. Image by Darcstudio 

Carbon neutrality is achieved when no additional carbon dioxide is added to the atmosphere in the creation and operation of an entity, such as a building. This can either involve eliminating emissions in the first place, negating emissions through offsetting, or a combination of both.

Assuming that using mass timber achieves this through its sequestered carbon alone can overlook several factors, such as the carbon footprint of other materials used to construct wooden buildings, including the interior finishes.

“Mass timber buildings have a lot of other material in them, especially in places where the code is challenging, especially for taller mass timber,” Leedham said.

Additionally, the carbon footprint of mass timber can also be impacted by how and from where the wood was sourced and transported, and what happens to it at the end of its useful life.

If the wood used in a building’s construction ends up in a landfill, it is likely to be incinerated or left to decompose, with its sequestered carbon released back into the atmosphere – cancelling out the carbon benefits.

“We can only control up to the point that the building is built”

“Forestry practices are super important to the overall carbon impact of mass timber, as well as end-of-life treatment,” explained Leedham.

“As designers and engineers, we can only control up to the point that the building is built. We can design in certain aspects so that it can be treated well at the end of its life in 100 years, but we don’t know what’s going to happen.”

The overlooking of these “critical factors” recently prompted Leedham to write a series of myth-busting essays on engineered wood, co-authored and published with US studio Lever Architecture.

The essays shine a light on the main misconceptions about mass timber that are circulating in the industry, in an effort to expose the truth behind them and promote the responsible use of the material in architecture.

“Mass timber is super important to the future of low-carbon construction,” she said.

“But it’s also really important that it’s done right. If it’s done incorrectly, then it’s just another form of greenwashing.”

Alongside the misunderstandings about mass timber and carbon neutrality, the essays also debunk beliefs that “all wood is good wood”, that it is always more sustainable than concrete, and that mass-timber buildings actually absorb carbon.

Co-author Jonathan Heppme, who is a principal at Lever Architecture, said the authors have heard these myths in discussions about their own projects, but also at industry events.

“These myths emerge very frequently”

“Variations on these myths emerge very frequently where architectural and engineering professionals meet to discuss construction and procurement with project owners, builders, manufacturers and trade representatives,” Heppme told Dezeen.

“These myths surface at symposiums, trade shows, conferences, lectures, or in conference rooms where decisions around the incorporation and advancement of mass-timber systems are being discussed,” he continued.

Both he and Leedham hope their publication will contribute to “more nuanced narratives from the mass timber industry” and advocate “healthy innovation” in this space.

In the essays, the authors outline how the industry can combat these myths – such as by encouraging architects to make conscientious sourcing decisions, which can, in turn, incentivise the timber industry to manage forests sustainably, and by improving understanding of carbon neutrality and how it can be achieved.

Timber-steel structure inside John W Olver Design Building in Massachusetts
Leedham believes timber, steel and concrete all have roles in the future of architecture. Photo is of John W Olver Design Building in Massachusetts by Albert Vecerka/Esto

Leedham told Dezeen that these solutions could also all be supported by the roll-out of worldwide carbon taxes for construction projects, which would require payments for the greenhouse gas emissions emitted by building components.

Not only would this lead to the more responsible use of mass timber, she said, but it would also encourage more sustainable practices when it comes to using materials such as concrete and steel.

“Carbon taxes would definitely speed up the adoption of any type of more sustainable construction practice,” said Leedham.

“If you had to pay for all the carbon emissions before you got your building permit, I think that would encourage the use of mass timber, it would encourage sustainable forestry practices, and it would actually encourage both the concrete and steel industry to reduce their emissions.”

Mass timber will not “dominate the industry”

This last point is particularly important as she believes that concrete and steel will remain vital materials in the future of architecture.

“The reality is that we need everything. Mass timber is one of a kit of parts,” said Leedham.

“I don’t think mass timber is going to ever dominate the industry, just because of the sheer volume of construction that’s happening, and I don’t think it wants to.”

“We absolutely need steel and concrete industries to also focus on reducing their emissions because we’re going to need all three primary structural materials,” she added.

This echoes the views of construction material expert Benjamin Kromoser, who told Dezeen in an interview that mass timber will not become a mainstream building material because it uses too much wood

“Wood is a limited resource,” he said. “It always has to be a balance between what we take from the forest to use for building construction and how much grows again.”


Timber Revolution logo
Illustration by Yo Hosoyamada

Timber Revolution
This article is part of Dezeen’s Timber Revolution series, which explores the potential of mass timber and asks whether going back to wood as our primary construction material can lead the world to a more sustainable future.

Reference

Double Stud Wall Simplified – Low Cost, High Performance
CategoriesSustainable News Zero Energy Homes

Double Stud Wall Simplified – Low Cost, High Performance

Simplify

The double-stud wall is a well-established method for creating a very economical, durable, and high R-value assembly in new construction – and is one reason it’s included as one of the basic 475 Smart Enclosure System assembly types. We know pushing standard code-minimum construction toward high performance is complicated. So we’re always looking for ways to simplify – to simultaneously reduce cost while optimizing efficiency and occupant comfort. Integrated with Pro Clima air sealing and moisture control components, the double-stud wall provides unmatched economic value, safety from moisture damage, and long-lasting performance.

Go Sheathingless

With Pro Clima component integration, we’re taking it one step further. Below we illustrate a sheathingless double-stud wall (that’s right: no structural sheathing) that provides the following characteristics:

  • Minimized material costs
  • Maximized moisture drying potential
  • Removal of formaldehyde, VOC’s and other toxic chemicals commonly found in SPF, rigid foams, OSB, and plywood
  • Easily adjustable wall thickness to meet your design R-value
  • Space between walls for continuous insulation
  • Utilization of dense-pack insulation (Gutex wood THERMOFIBER, cellulose, fiberglass, mineral wool, or Havelock Wool).
  • No special materials or connections needed for the framing components
  • Fits with the typical platform framing method

You can still frame your walls on the deck and raise them into place,  but without all that sheathing they’ll be a lot lighter. With this system, you build a house out of 2x4s, fibrous insulation, SOLITEX MENTO Plus weather-resistive barrier outboard, INTELLO Plus smart vapor retarder inboard, and not much else.

The Framing

The wall consists of an inner load-bearing wall and an outer exterior finishing wall. The floor and roof loads are stacked on top of the inner wall studs. This method can allow the use 24″ o.c. advanced framing assembly if your floor and roof loads meet the design criteria. The inner wall is framed like any other stick-built wall, with the exception that the shear load is carried by 2x lumber nailed, or metal strapping mechanically fastened, diagonally, to the outside face of the inner stud wall – in the insulation cavity.

It’s important to note that each structure will have very different shear and uplift retention requirements due to variables in building height, the number of windows, local codes, shape of building, seismic requirements, etc. The outer wall is connected to the decks as outriggers, there to support the insulation and finished facade elements, and consequently, it requires minimal framing material and opening headers. In taller walls, it’s important to connect the inner and outer studs for additional strength as well as partition the bays every second bay – to make dense-packing of the double stud cavities easier to reach proper density and maintain quality control.

The Integrated Service Cavity

With this approach, the inner wall studs act as the service cavity without the need for additional strapping to support the interior finish – making it an integrated service cavity. This approach takes planning but allows for fewer steps and less material. An excellent example of this approach is demonstrated in our Project Spotlight: Vermont Integrated Architecture. Leicester, VT.

Two Air Barriers Too

To optimize the insulating value of the dense-pack insulation – airtight membranes are placed on both sides of the fibrous insulation, thereby preventing thermal bypass, as well as optimizing the drying reserves of this highly insulated wall. At the interior side is the INTELLO PLUS membrane, airtight with intelligent vapor control, making it vapor open in the summer to facilitate inward drying and vapor retarding in the winter to prevent vapor accumulation into the insulation. The INTELLO Plus is reinforced so that it substitutes for the typical mesh used in a dense-pack installation. At the exterior side is SOLITEX MENTO PLUS: airtight, waterproof, reinforced and vapor open, allowing for maximum drying potential to the outside without being restricted by an exterior sheathing, like plywood or OSB, which are Class II or low Class III vapor retarders.

Windows & Penetrations

The window is installed into a plywood box that ties together the inner and outer walls. We offer a wide selection of window air sealing tapes, but to keep it simple you need only TESCON PROFIL, or the even faster TESCON PROFECT, for the airtight connections at the interior and exterior of the window. (And don’t forget to pre-make your window corners!). At the sill heavy-duty self-sealing waterproofing is provided by EXTOSEAL ENCORS. There are multiple ways to create a thermal bridge free window installation – there are many variables depending on the window type and brand.

The most important thing is to make sure that the window is precisely connected to your interior and exterior airtight and moisture control layers. This will ensure that your installation will not have condensation due to air movement at this thermally weak intersection. Small air leakage at this connection will allow the interior winter humidity to enter the insulated cavity. Making an air-tight connection at all openings is the best way to prevent future structural damage.

Learn More

For more details and variations on this concept, download  475’s free CAD details and ebook for 475 Smart Enclosure Double-Stud Assemblies.

By 475 Building Supply

This guest blog was originally published on the 475 Building Supply blog.

Reference

The Double Stud Wall Simplified – Low Cost, High Performance
CategoriesSustainable News Zero Energy Homes

The Double Stud Wall Simplified – Low Cost, High Performance

Simplify

The double-stud wall is a well-established method for creating a very economical, durable, and high R-value assembly in new construction – and is one reason it’s included as one of the basic 475 Smart Enclosure System assembly types. We know pushing standard code-minimum construction toward high performance is complicated. So we’re always looking for ways to simplify – to simultaneously reduce cost while optimizing efficiency and occupant comfort. Integrated with Pro Clima air sealing and moisture control components, the double-stud wall provides unmatched economic value, safety from moisture damage, and long-lasting performance.

Go Sheathingless

With Pro Clima component integration, we’re taking it one step further. Below we illustrate a sheathingless double-stud wall (that’s right: no structural sheathing) that provides the following characteristics:

  • Minimized material costs
  • Maximized moisture drying potential
  • Removal of formaldehyde, VOC’s and other toxic chemicals commonly found in SPF, rigid foams, OSB, and plywood
  • Easily adjustable wall thickness to meet your design R-value
  • Space between walls for continuous insulation
  • Utilization of dense-pack insulation (Gutex wood THERMOFIBER, cellulose, fiberglass, mineral wool, or Havelock Wool).
  • No special materials or connections needed for the framing components
  • Fits with the typical platform framing method

You can still frame your walls on the deck and raise them into place,  but without all that sheathing they’ll be a lot lighter. With this system, you build a house out of 2x4s, fibrous insulation, SOLITEX MENTO Plus weather-resistive barrier outboard, INTELLO Plus smart vapor retarder inboard, and not much else.

The Framing

The wall consists of an inner load-bearing wall and an outer exterior finishing wall. The floor and roof loads are stacked on top of the inner wall studs. This method can allow the use 24″ o.c. advanced framing assembly if your floor and roof loads meet the design criteria. The inner wall is framed like any other stick-built wall, with the exception that the shear load is carried by 2x lumber nailed, or metal strapping mechanically fastened, diagonally, to the outside face of the inner stud wall – in the insulation cavity.

It’s important to note that each structure will have very different shear and uplift retention requirements due to variables in building height, the number of windows, local codes, shape of building, seismic requirements, etc. The outer wall is connected to the decks as outriggers, there to support the insulation and finished facade elements, and consequently, it requires minimal framing material and opening headers. In taller walls, it’s important to connect the inner and outer studs for additional strength as well as partition the bays every second bay – to make dense-packing of the double stud cavities easier to reach proper density and maintain quality control.

The Integrated Service Cavity

With this approach, the inner wall studs act as the service cavity without the need for additional strapping to support the interior finish – making it an integrated service cavity. This approach takes planning but allows for fewer steps and less material. An excellent example of this approach is demonstrated in our Project Spotlight: Vermont Integrated Architecture. Leicester, VT.

Two Air Barriers Too

To optimize the insulating value of the dense-pack insulation – airtight membranes are placed on both sides of the fibrous insulation, thereby preventing thermal bypass, as well as optimizing the drying reserves of this highly insulated wall. At the interior side is the INTELLO PLUS membrane, airtight with intelligent vapor control, making it vapor open in the summer to facilitate inward drying and vapor retarding in the winter to prevent vapor accumulation into the insulation. The INTELLO Plus is reinforced so that it substitutes for the typical mesh used in a dense-pack installation. At the exterior side is SOLITEX MENTO PLUS: airtight, waterproof, reinforced and vapor open, allowing for maximum drying potential to the outside without being restricted by an exterior sheathing, like plywood or OSB, which are Class II or low Class III vapor retarders.

Windows & Penetrations

The window is installed into a plywood box that ties together the inner and outer walls. We offer a wide selection of window air sealing tapes, but to keep it simple you need only TESCON PROFIL, or the even faster TESCON PROFECT, for the airtight connections at the interior and exterior of the window. (And don’t forget to pre-make your window corners!). At the sill heavy-duty self-sealing waterproofing is provided by EXTOSEAL ENCORS. There are multiple ways to create a thermal bridge free window installation – there are many variables depending on the window type and brand.

The most important thing is to make sure that the window is precisely connected to your interior and exterior airtight and moisture control layers. This will ensure that your installation will not have condensation due to air movement at this thermally weak intersection. Small air leakage at this connection will allow the interior winter humidity to enter the insulated cavity. Making an air-tight connection at all openings is the best way to prevent future structural damage.

Learn More

For more details and variations on this concept, download  475’s free CAD details and ebook for 475 Smart Enclosure Double-Stud Assemblies.

By 475 Building Supply

This guest blog was originally published on the 475 Building Supply blog.

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