Description

Greater understanding of how to incorporate air seals in openings and penetrations in the exterior envelope of a building is necessary to prevent wind-driven water from entering.

It’s more than 30 years since E2/AS1, the Acceptable Solution for proving compliance with Building Code clause E2 External moisture, was introduced and widely adopted by the industry.

Scope

This article includes:

• Increased understanding of weathertightness
• Air pressure
• Pressure moderation
• E2/AS1 air seals to exterior joinery/meter boxes
• E2/AS1 air seals to pipe penetrations
• Building envelope airtightness