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5 Reasons Why Airtight Drywall Is Obsolete

5 Reasons Why Airtight Drywall Is Obsolete

5 Reasons Why Airtight Drywall Is Obsolete After keeping the rain out, airtightness is the most important thing we can do to make our buildings energy efficient and comfortable - that's a building science fact. A fully functional air barrier is fundamentally important to the proper functioning of the building. Consequently we should t … read more

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An Interior Air Barrier Does It Better

An Interior Air Barrier Does It Better

An Interior Air Barrier Does It Better Ever tempted to wear your underwear over your pants? Neither are we! But when it comes to buildings, we’re seeing a lot of common practices that are equally backwards. It turns out that air barriers, like underwear, perform their job much better on the inside. To be more specific, that means inb … read more

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The Ten Golden Rules for Foam-Free Flat Roofs

The Ten Golden Rules for Foam-Free Flat Roofs

Ten Golden Rules for Foam-Free Flat Roofs When insulating a flat roof wood structure, 475's goal, as always, is to do it in the most healthy, structurally sound, durable, and ecologically friendly way - achieving truly high performance. This means we try to generally avoid using foam above or below the roof deck (for more on that, see … read more

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INTELLO Airtight System Aces Laboratory Assembly Tests

INTELLO Airtight System Aces Laboratory Assembly Tests

INTELLO Airtight System Aces Laboratory Assembly Tests First interior air barrier system to be successfully tested to ASTM E2357 and compliant with IECC, IRC 2015 and ASHRAE 90.1 Selecting appropriate materials and systems to form an inboard air barrier is a critical step in designing and building foam free, high-performance enclosur … read more

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Adhesive Bonds and Failures: What's Going On?

Adhesive Bonds and Failures: What's Going On?

Adhesive Bonds and Failures What's Going On? We use adhesives to form airtight and watertight enclosures. It is essential that the adhesive bonds are strong and lasting.... 50 years, 100 years, and longer. How do we know when we have the right kind of adhesion? What are the different ways a tape's adhesion will be able to provide us … read more

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The Value of Air and Vapor Control

The Value of Air and Vapor Control

The Value of Air and Vapor Control Foundational Elements Of High Performance Enclosures We’ve heard the chorus of misinformation throughout years of speaking to builders across North America: “Buildings need to breathe – you’ll destroy them if you make them airtight”. “In a cold climate, if you don’t put a vapor barrier on the inside o … read more

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