GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

Flat roof venting

Cherry Lobaton | Posted in General Questions on

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 ?

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.

Replies

  1. GBA Editor
    Martin Holladay | | #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.

Log in or create an account to post an answer.

Community

Recent Questions and Replies

  • |
  • |
  • |
  • |