0 Helpful?

Air sealing penetrations

My new house is designed to limit penetrations through the building envelope to as few as possible. Nevertheless, sillcocks, outside electrical receptacles, outside lights, HRV intake/ exhaust, etc. need to be sealed.
Are there methods or products that are more effective than others? How about ease of installation? I've seen photos of tape covering holes and that seems like a pretty clunky solution. I'm probably going to either do much of the airsealing myself, or at least supervise it.
Thanks for any advice.

Asked by stephen sheehy
Posted Aug 29, 2014 8:24 AM ET
Edited Aug 29, 2014 10:06 AM ET


3 Answers

Select your preferred way to display the comments and click "Save settings" to activate your changes.

There is no single answer to your question. Most builders use a combination of rubber boots, European tape, peel-and-stick flashing, and caulk. In some cases, canned spray foam is useful, although it doesn't always provide a foolproof seal.

If these products are new to you, you can survey the offerings of two online suppliers, 475 High Performance Building Supply and Small Planet Workshop.

Answered by Martin Holladay, GBA Advisor
Posted Aug 29, 2014 10:07 AM ET
Edited Aug 29, 2014 10:09 AM ET.


How a brief description of what a cross section through a wall and roof looks like and how you air sealed them?

Answered by Terry Lee
Posted Aug 29, 2014 2:37 PM ET


Also look up Grace Vycors new spray on air sealing methods. It looks very promising.


Answered by Richard Beyer
Posted Aug 29, 2014 11:24 PM ET

Other Questions in Energy efficiency and durability

Anyone familiar with Insultex house wrap?

In Green products and materials | Asked by Marcus Sheffer | Jul 31, 15

Double Stud Wall sheathing and vapor barrier

In Plans Review | Asked by Jimmy Nguyen | Sep 30, 15

Insulation advice

In Energy efficiency and durability | Asked by Quinton | Oct 4, 15

Sure ext foam when blowing wall cavities might be good idea, but is it NECESSARY?

In Energy efficiency and durability | Asked by Mark Baker | Oct 5, 15

Sight-built Sips detail--leave the middle foil face?

In GBA Pro help | Asked by Brian McDonald | Oct 5, 15
Register for a free account and join the conversation

Get a free account and join the conversation!
Become a GBA PRO!