air barrier

A New Take on Insulating a Roof

For vaulted ceilings, this vented and vapor-open approach is durable and energy-smart, and a good option for houses in mixed and cold climates.
Installing New Siding on Top of Old Siding

When covering existing finishes with new ones, consider how trapped moisture will dry, and how to create an affective air barrier.
Cold-Climate Attic Air-Sealing

A Minnesota builder shares his method for ensuring a continuous air/vapor control layer.
Detailing the Wall-to-Roof Transitions

Watch how the 2020 FHB House team creates a tighter building envelope by installing roof overhangs after the WRB.
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Create Airtight Drywall With Great Stuff Flexible Drywall Gasket

This water-based foam gasket offers a clean and simple way to get a consistent, reliable air-seal between your framing and drywall.
Installing ZIP System Sheathing: Sheathing-to-Foundation Connection

Builder Ben Bogie presents three methods for making an airtight connection at the bottom of your walls using sealants or tapes that will adhere to concrete.
Better Vented-Roof Baffles

Reduce the amount of moisture that gets into insulation baffles by installing a variable-permeance membrane.
7 Common Fireblocking Locations

Builder Mike Guertin outlines fire-safety code requirements and suggests acceptable fireblocking and draftstopping methods and materials.
Getting Interior Air-Barrier Details Right

Installation of the Intello Plus membrane on the inside of the third floor of the 2020 FHB House happens in conjunction with additional wall framing to get a good air-seal and to make room for lots of cellulose insulation.
An Alternative Way to Install Roof Overhangs

While eave overhangs are typically built as part of the main roof framing, installing them as separate pieces offers better air-sealing opportunities.

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