0 Helpful?

Tremco ExoAir Trio substitute

Is there a less expensive but just as effective way to insulate, air and water seal window installations? I like the Tremco product but cannot justify paying >$300 per roll on my larger windows applications. Does low expanding foam sealant in a can work just as well? Thanks.

Asked by Matthew Michaud
Posted Jan 7, 2013 9:35 PM ET

Tags:

2 Answers

Select your preferred way to display the comments and click "Save settings" to activate your changes.
1.

Matthew,
I don't have any direct experience using ExoAir Trio, but I imagine that you will be interested in the following blog post that addresses your question: A Trio of Window Air Sealing Details.

Answered by Martin Holladay, GBA Advisor
Posted Jan 8, 2013 6:55 AM ET

2.

Are you looking for a weather resistant seal? Or just an airseal? Flanged or unflanged windows?

Instead of a trio, you might consider a tandem . . .

Install an oversize closed cell foam backer rod---then reinforce with can foam. The expanding foam locks the backer rod into place, helps seal any imperfections in your application, and provides additional insulation. An alternative is to use a permanently flexible sealant over the backer rod. Here is a good source for bulk backer rod:

http://www.demandproducts.com/eifs-items/item.php?l2=3,44,49&sku=GROUPSR

Alternately, you can install the can foam first, then tape the interior. This is the method shown by Jesse Thompson, in the latest Fine Homebuilding mag. See energysmartdetails on p. 88 of the January 2013 issue. His editorial also addresses your question on expanding foam performance.

Answered by Daniel Ernst
Posted Jan 8, 2013 10:46 AM ET

Other Questions in Green products and materials

Slow rise foam or dense pack cellulose in roof slope?

In Webinar Follow-up Q&A | Asked by elizabeth hilder | May 17, 15

Is there a standard factor General Contractors use when calculating their fee to construct

In General questions | Asked by scott schroeder | May 22, 15

Attached garage with steps leading into basement

In General questions | Asked by Dirk Denzin | May 26, 15

Best backfill material for frost protected shallow foundation?

In General questions | Asked by Brian P | May 26, 15

Add exterior foam -- but paper-faced batts?

In Green building techniques | Asked by Kyle Hollasch | May 26, 15
Register for a free account and join the conversation


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