Recent Q&A

• Standing-Seam Metal Roof Over Mineral Wool Board Insulation

  I am planning a metal standing seam roof over 2 1/2" of mineral wool insulation above an unvented roof assembly with batts between rafters. At one of the builder shows…

• Roof insulation for unvented rafter space

  I was granted a building permit for a workshop, with metal roof / 1 1/2" mineral wool board / WPB / plywood sheathing / 2x8 joists with Rockwool batts/plywood ceiling;…

• Is stucco finish practical on advanced framing?

  Is there a way to make 1" stucco over 1/2" plywood a good assembly over 24" c-c 2x6 framing?

• What level of heat is recommended in an unvented crawlspace?

  My project has 2200 sf crawlspace, 2/3 of which is 18" minimum and the rest on a down slope having a height up to 12' and which will house a…

• What is the best flash-and-batt approach for a low-pitch unvented cathedral assembly?

  New 2600 sf house is a low-pitch 1 1/2 : 12 shed standing seam metal over plywood sheathing on 1 3/4x14 LVL's 24" o.c., drywall ceiling. Zone 3 SF bay…

• Retrofitting loose-fit batts in cathedral ceilings

  What is the best method to retrofit loose batts that don't fill rafter cavities? Should we slice pieces of unfaced fiberglass, or blow in loose fiberglass fill? I am concerned…