Recent Q&A

• Insulating a Sill Plate

  We are redoing an older home in zone 4, dirt crawl space, vented, without insulation. The sill is untreated, and without sill seal. The plan is to air seal with…

• Double Foil-Faced EPS for Exterior Insulation

  I have an opportunity to get 50 sheets of 2 inch 4x8 foil on both side insulation boards really cheap. Doing a total remodel on a 60 year old home…

• Is there an average size for dedicated fresh air duct.?

  Doing a retrofit of a older home, plan to install and ERV and was wondering if there was an average/standard size of duct work. I know manufactures instructions should be…

• retro waterproof and insulate basement

  We are doing a energy retrofit of a 40 year old addition on a 70 year old home. The addition had a partial basement (pond) that had poor grade externally.…

• EPDM insulation protector for sill plate seal?

  In the article "Getting Slab Insulation Right," a possible protection for external slab insulation was an EPDM covering for the foam. Can this EPDM cover be continued up and over…

• Air sealing

  Building a new house in zone 6 will use an edpm gasket seal on sill plate what is a general good product to seal remainder of frame prior to install…

• Cold climate wall options

  Getting ready to do first home build in zone 6a mid 2021 so researching as much as possible to prepare. GBA and other fine sources as data base but not…