Recent Q&A

• Combining spray foam and interior rigid foam in roof

  I’m in climate zone 2, hot and humid. My home addition has a flat roof, 2x6 construction with plywood sheathing and EPDM. Unfortunately no exterior insulation and too late to…

• Caulk for framing members, windows

  What caulk do y’all recommend to seal the gaps between double studs (before attaching drywall), bottom plate to concrete foundation and around windows (in combination with backer rod)?I’m a big…

• Too much insulation

  Is there such a thing as having too much insulation? My recent home addition has a 2x6 wall construction with 1.5“ polyiso on the exterior. So that’s already R10. Code…

• Tyvek window detail not air tight?

  I can’t wrap my head around the Tyvek window detail. I think it allows air to enter the building or maybe I’m just overthinking this.Regular 2x4 stud wall with ply…

• Caulking studs in spray foamed wall

  I have a question about air sealing. I taped the seams in my exterior sheathing with Siga tape. Stud bays are insulated with open cell spray foam. Do I still…

• Sandwiching Exterior Rigid Foam Between Two Layers of Ply Sheathing

  I plan on installing thin stone veneer on the first story of my house. Regular 2x4 wall construction with 1/2 plywood sheathing and 1.5” polyiso on the exterior of the…

• Epdm roof with double vapor barrier

  I’m in climate zone 2, hot and humid.I have an EPDM flat roof on part of my house. The EPDM is glued directly to the plywood deck. There’s no exterior…

• ERV Ventilation System for Hot-Humid Climate

  My old 3500 sf house is slowly getting renovated and retrofitted with spray foam to make it air tight. I need a complete new AC system and the hvac contractor…

• Concrete slab moisture issue

  I have a shed with concrete slab on foundation. They never put any poly down before pouring the concrete. Now every time we get a lot of rain (I’m in…

• Unvented roof design in hot/humid climate

  I’ve been doing a lot of research but still have some questions. Hopefully some of the experts can chime in.Im in climate zone 2. Hot and humid. A few years…