Getting the Details Right for an Unvented Roof - Fine Homebuilding

previous
  • 7 Trim Carpentry Secrets
    7 Trim Carpentry Secrets
  • Tips & Techniques for Painting
    Tips & Techniques for Painting
  • Custom Flooring Inspiration
    Custom Flooring Inspiration
  • Master Carpenter Videos
    Master Carpenter Videos
  • Remodeling Articles
    Remodeling Articles
  • Magazine Departments
    Magazine Departments
  • Radiant Heat Comparison
    Radiant Heat Comparison
  • 9 Concrete Countertops Ideas
    9 Concrete Countertops Ideas
  • Energy-Smart Details
    Energy-Smart Details
  • Design Inspiration
    Design Inspiration
  • Basement Remodeling Tips
    Basement Remodeling Tips
  • 7 Small Bathroom Layouts
    7 Small Bathroom Layouts
  • Video Series: Tile a Bathroom
    Video Series: Tile a Bathroom
  • Clever daily tip in your inbox
    Clever daily tip in your inbox
  • Read FHB on Your iPad
    Read FHB on Your iPad
  • All about Roofing
    All about Roofing
  • 7 Smart Kitchen Solutions
    7 Smart Kitchen Solutions
  • Video: Install a Fence
    Video: Install a Fence
next

Editor's Notepad

Editor's Notepad


Getting the Details Right for an Unvented Roof

comments (0) May 24th, 2011 in Blogs
ScottG Scott Gibson, contributing writer


How do you know when insulating your attic with spray foam is a good idea?

Writing in a Q&A post at GreenBuildingAdvisor, Storm is having second thoughts about his decision not to vent the roof. With the standing seam metal roofing already applied, it's too late to add a layer of rigid foam insulation on top of the sheathing, but he wonders whether there are other steps he should consider?


Further Resources


How to Air-Seal an Attic

Airtight Attic Access

Does Fiberglass Still Make Sense?


Then there's the question of the insulation itself. The three contractors he's spoken with all agree that 6 in. of open-cell foam will be enough for this house in Climate Zone 4. Trouble is, that's well below the amount of insulation required by code, and the plan raises questions about the risk of condensation on the bottom of the sheathing.

Those issues are at the heart of this week's Q&A Spotlight.

 

Read the whole article at Green Building Advisor.

 

 



posted in: Blogs, energy efficiency, insulation, roofs, attic

Comments (0)

Log in or create a free account to post a comment.