Recent Q&A

• Butyl or Rubberized Asphalt Window Flashing

  Hello everyone,I have window installers coming to install vinyl replacement windows in my existing 1940's house with brick veneer, over tar paper over wood fiberboard sheathing. Climate zone 6. The…

• How to Find Studs Through Exterior Insulation

  Hi everyone, I have 2 questions about installing vertical furring strips for siding over 3" of exterior Roxul Comfortboad insulation (over a peel and stick WRB/exterior air barrier). I plan…

• Metal Box Over Recessed Lights

  I went exploring in my attic this morning to find my pot lights and see what I can do about air sealing them. I found they are covered with steel…

• Staggering seams of stone wool insulation

  Hi everyone,I have seen advice the stagger the seams of layers of exterior foam insulation. Is this necessary/helpful for Rockwool Comfortboard 80? Or is the insulation so air permeable it…

• Air sealing an old, leaky wall

  My mother-in-law is renovating her kitchen and the contractor just opened up the exterior wall today. Her house is about 100 years old, in Climate Zone 6. The wall assembly…

• 6毫升保利和外部绝缘泡沫

  Polyethylene vapour barrier and exterior foam insulation?! I know, I know... trapped moisture, don't do it. BUT... I see tons of walls built this way everywhere in Canada! Typically: drywall,…