0 Helpful?

Flat roof venting

I am building a house in WV with a 3 FT height flat roof attic. The 18" trusses are up and had them put an "attic foil" below the roof sheating. My HVAC and water pipes will be below the trusses. There is a 3 Ft. roof hangover surrounding the house. WHAT IS THE BEST WAY TO INSULATE THIS ATTIC.
My contractor is planning to put the fiberglass insulation in the trusses. Can he do that ?

Asked by Cherry Lobaton
Posted Nov 19, 2012 7:44 PM ET

Tags:

1 Answer

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

Cherry,
Q. "What is the best way to insulate this roof?"

A. The best way to insulate a flat roof is to install a thick layer of rigid foam insulation on top of the roof sheathing. Then install roofing on top of the rigid foam.

Fiberglass batts between the trusses will not perform very well, and may lead to moisture problems.

Answered by Martin Holladay, GBA Advisor
Posted Nov 20, 2012 7:21 AM ET

Other Questions in General questions

Insulation and mechanical upgrades

In Mechanicals | Asked by Jeffrey S | May 29, 15

Spaceloft my only option?

In GBA Pro help | Asked by Jan Verschuren | May 29, 15

Minisplit in tandem with a conventional heat pump?

In Mechanicals | Asked by Dean Wiley | May 27, 15

How to air seal from interior with pine siding?

In Green building techniques | Asked by christian routh | May 29, 15

Skylights that sit flush but don't leak! Do these exist?

In General questions | Asked by Nathalie Jordi | May 27, 15
Register for a free account and join the conversation


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