February 14, 2017 airtight gap

Top Ten *NO* Eleven Air Barrier Failures

1. It’s not continuous! The mother of all failures. You don’t have an air barrier if it’s not continuous – it won’t be air tight. Many of the items that follow below are all causes of discontinuity. Like a balloon or a submarine – the continuity of the airtight layer must be sacrosanct. While discontinuity can […]

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January 23, 2017 IMG_1267

Vented High Performance Standing Seam Metal Roof

SOLITEX UM Project Spotlight in Waltham MA SOLITEX UM from Pro Clima is  a 4-layer, vapor open and waterproof membrane with integrated 3-D mesh.  Like other SOLITEX membranes, it has an actively vapor open, monolithic layer of TEEE film that is extremely waterproof (see The SOLITEX MENTO Difference)– and outperforms vapor closed underlayments both in outward drying potential as well […]

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January 23, 2017 Vana_Moving

How to Stay Airtight When Buildings Move

Buildings move. Ensuring that your air barrier is resilient to movement is crucial to ensuring the longevity and performance of your building. Unless you’re building a structure using just one material (like superadobe), your building will consist of an array of different materials. In response to fluctuations in temperature and humidity, different materials expand and contract at […]

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September 9, 2016 ridge-vent

Vapor Venting An Unvented Roof: In Praise of Belts and Suspenders

Planes can fly safely with one engine. And you can keep your pants up with just a belt. But if you’re looking to be protected from fools, then adding suspenders to the belt might be what sets you free. So while we’ve previously outlined the essential importance of inboard airtightness and vapor control and have specifically written […]

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June 28, 2016

SOLITEX Resource Library

Pro Clima SOLITEX exterior membranes are leading the way to higher performance and better energy efficiency in North American construction. SOLITEX products offer unmatched waterproofing, airtightness and outward drying potential for all types of projects. Their exceptional strength and durability make them suitable not only as housewraps or weather resistant barriers (WRBs) – but also as “sarking” membranes for vapor open […]

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June 24, 2016 Profect


A Pre-Folded Tape That Makes Perfect Corners   Based on Pro Clima’s proven tape technologies, TESCON PROFECT gives architects and contractors a new important tool to make airtight connections at inside corners, quickly and precisely.  TESCON PROFECT is delivered pre-folded in the roll of tape – with only one leg of release paper.  This allows for fast application, […]

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May 23, 2016 double_stud

The Double-Stud Wall Simplified: Low Cost, High Performance

Simplify. 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. [See our recent post on Breaking The “Upfront Cost Barrier”.] The double-stud wall is a well established method for creating a very economical, durable and […]

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April 5, 2016 CoverShot

Best of Off-Label Uses part 2

Because you love sending us examples of the many creative and improvisational ways you end up using our handy high performance materials, this has become a series of sorts. See part 1 of The Best of Off-Label Uses, and keep your images coming through twitter, facebook, or instagram. … and remember: don’t try this at home, […]

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February 11, 2016 intello

INTELLO & DB+ Approved by DIBt for Use in Unvented Hot Roof Assemblies

The highly respected Federal Agency Deutsches Institut für Bautechnik (DIBt)* has certified INTELLO PLUS and DB+,  per German testing standard DIN68800-2, for use in unvented assemblies with vapor closed exteriors.  Such assemblies include unvented metal roofs, green roofs and gravel roof flat roofs, as well as vapor closed pitched roofs with asphalt shingles, EPDM, TPO etc.  With this certification these materials […]

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January 29, 2016 IntegratedService

INTELLO PLUS Resource Library

INTELLO PLUS is revolutionizing the North American construction industry. No other product provides the same level of vapor control, airtightness and resilience for your high performance projects. We also know that many builders and architects out there are looking to increase their understanding of INTELLO PLUS – from how it works to how to install it. (more…)

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October 8, 2015

Yes, Unvented Roof Assemblies Can Be Insulated With Fiberglass – A WUFI Post

And Not Just In Climate Zones 2B & 3B: Cold Climates Too A post on August 21st, 2015 on GreenBuildingAdvisor.com, Martin Holladay asked the question, Can Unvented Roof Assemlies Be Insulated With Fiberglass?  Martin’s post focuses on the marketing of Owens Corning’s ProPink Unvented Attic Insulation System.   The Owens Corning system is only allowed by code in zones 2B […]

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September 28, 2015 CO Rockies PH

inhabitat.com highlights a DIY Passive House project

How to Build a Passive House Off-grid, and Without Foam by Andrew Michler, offers some creative solutions to a DIY project. The author, along with “an unseasoned team”, went on a building adventure to create a place to live in the Colorado Rockies that would be warm enough in the winter without working heat. He […]

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August 10, 2015 intellomashpee

INTELLO Plus transforms assisted living facility in Mashpee, MA

  475 High Performance Building Supply is proud to be the supplier of INTELLO Plus intelligent vapor retarder membrane and other Pro Clima products for an Assisted Living Facility in Mashpee, MA. According to their website, “Bridges® by EPOCH at Mashpee continues our commitment to providing the highest-quality senior living experience and care exclusively for those with Alzheimer’s disease […]

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August 6, 2015 profilcorner

Pre-make Window Corners With TESCON Profil

One of the hardest parts to properly make a house airtight is making the air control layer absolutely continuous: to go around the drawing and through every detail without picking up the red pen.  This is especially true at the 3 dimensional connections of inside corners, which don’t necessarily announce themselves in 2 dimensional drawings. At […]

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July 14, 2015 IntellovsOSBvsPlywood2

Why The Vapor Curve Matters

How vapor variable materials stack up when it comes to mileage and protection Intelligent membranes, or smart vapor retarders, can help prevent condensation in enclosure assemblies (walls and roofs) in winter, while allowing inward diffusion in summer. This transformation is important to assure the safety of an insulated assembly, by increasing its drying reserves so it can cope with (unforeseen) moisture — both into […]

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July 5, 2015 TESCON VANA

6 Reasons Pro Clima Airtight Tapes are Best

You have a choice of air sealing tapes, so why choose Pro Clima?  With six solid reasons making the case, it’s easy to say Pro Clima tape is the best: Reason #1: Pro Clima Tapes Have The Best Stick The pressure activated adhesion of Pro Clima’s solid acrylic tapes are second to none, as proven by […]

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May 7, 2015 ReportFromGermany2

475 Goes to Germany

One of the great treats of being a partner at 475 High Performance Building Supply is the annual trip to the International Passive House conference – this year in Leipzig, Germany,  April 17th and 18th. We have the opportunity to see customers from across North America, visit our leading product suppliers and stay up-to-date on […]

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April 14, 2015

Applying Extoseal Encors

Window sills see a lot of water. This is largely because glass is very waterproof, so all the rain that hits a window will end up on the sill. All that water needs to be directed outwards. For that to happen, first sills need to be proper pitched, especially if windows are set deeper into […]

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March 6, 2015 QuestionsAnswered

This is my first time here…where do I start?

You’ve just stumbled upon 475’s website. You know you want to build high performance / Passive House / low-energy and you don’t know where to even begin. Don’t worry – you’re not alone. We often receive calls, emails, chats, etc. asking questions about what we offer, what sets our products apart from currently available materials, and where […]

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March 2, 2015 profilbeforeafter

Tescon Profil’s New Look

Thanks to your feedback, our best-selling window tape, Tescon Profil, has a new look. Customers tell us they love using Tescon Profil to easily make airtight connections to window frames, door openings, wood framing (joist, beams,studs) and steel profiles. We also heard that, on the building sites, it was easy to confuse this tape with our flat-seam-sealing standard: Tescon […]

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February 12, 2015 solitex um grey 3

Project Spotlight: Lincoln, VT Shows Off SOLITEX UM

  Vented rainscreens for walls and roofs are are an important part of high performance construction. In our blog post Vented rainscreen: what a high performance building wants, we argue that a rainscreen is a good idea pretty much across the entire USA (and Canada), for the following reasons: It keeps the sun and the majority of rain […]

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February 9, 2015 Screen Shot 2014-12-15 at 9.34.16 AM

The Best of Off-Label Uses

We love getting images of the ways our customers use Pro Clima when duct tape won’t cut it. It’s time we share our favorites. Please keep them coming!   Now go check out PART 2 of Best Off-Label Uses. This has become a series!

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January 16, 2015 IMG_6359

Hanover, NH: Dartmouth College Dormitory Retrofit

Countless historic masonry buildings dot the American landscape, a large number of them falling under some form of aesthetic scrutiny prohibiting exterior insulation. The only option to make these buildings energy efficient is to insulate them on the interior. 475 High Performance Building Supply works with architects and builders to insulate these walls safely from the interior – considering moisture drive, bulk rain water […]

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January 13, 2015 BrickTest

Insulating Historic Masonry Buildings Safely: How WUFI Can Help

With the rising popularity of Passive House and EnerPHit renovation in brownstone and brick masonry renovations in the US and Canada, the question comes up time and time again: What insulation levels are needed to create an efficient structure and how far should and can we push interior insulation levels without running into issues? One […]

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December 30, 2014 proclimaCANADA

Press Release: 475 Granted Exclusive Pro Clima Distribution in Canada

FOR IMMEDIATE RELEASE Building Airtightness Specialists Offer New Solutions to Canadian Builders German Airtight Building Leader Grants Exclusive Canadian Distribution to 475 High Performance Building Supply New York City – December 30, 2014 475 High Performance Building Supply (475), a building materials company based in New York City, is offering a new solution for building […]

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December 11, 2014 Times Sq New Years

475’s 2014 Year in Review

2014 has been a great year of activity and growth at 475.  Let’s take a quick tour: Enhanced Customer Service is first and foremost in our minds and we hit important milestones growing our capabilities, including: A new distribution warehouse located in Oregon for speedy west coast delivery. Regional Product Consultant Kent Lessly in the Mid-Atlantic states. […]

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December 10, 2014 HistMasonryEbook

Get your FREE 475 eBook: High Performance Historic Masonry Retrofits

475 is proud to now offer a free beta version of our first eBook. High Performance Historic Masonry Retrofits is a comprehensive look at the materials and details required to make masonry building transformations a success. We lay out all the details necessary for optimizing building airtightness, vapor control, and continuous insulation. There are detailed chapters on the walls, roofs, cellars […]

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December 9, 2014 proclimaCANADA

Oh, Canada!

With the 2014 conference and trade show season drawing to a close, the team at 475 caught a glimpse of new horizons while fraternizing with our neighbors to the north last week at the 2014 Construct International trade show in Toronto, Ontario. Loaded with models, samples, and enthusiasm to show off our Pro Clima products […]

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November 5, 2014 Lothar in Vancouver

West Coast Pro Clima Tour Recap

Pro Clima founder, building scientist, and INTELLO inventor Lothar Moll along with Jens Lüder Herms, head of Pro Clima R&D, toured the west coast in mid-October with me (Floris) to present information, see common construction practices, and analyze how to improve the quality of construction. This trip also coincided with 475 opening of our west coast warehouse, which will […]

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