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

Metal roof over unvented cathedral ceiling

Birdie L | Posted in Energy Efficiency and Durability on

Seeking advice on this application.

Center of home is Unvented Cathedral Ceiling with Closed Cell (possibly flash and batt to reach R value). On top of the sheathing will be asphalt felt, then metal roof. We purchased the Classic Rib from Metal Sales.

Sides of the home are Vented Attics with fiberglass insulation. Also to have asphalt felt on top of the sheathing, then metal roof.

I called Metal Sales, and they stated the metal roof can be installed directly to the underlayment.
Does anyone see any possible condensation issues?

Climate Zone 5.

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

    Bridget,
    The representative from Metal Sales is correct. As long as you have installed a layer of asphalt felt underlayment, you don't have to worry about condensation.

    -- Martin Holladay

    .

Log in or create an account to post an answer.

Community

Recent Questions and Replies

  • |
  • |
  • |
  • |