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polyiso insulation

  1. Insulation
    I've just stripped a vaulted ceiling down to 11" rafters and roof deck. Because of a venting limitation I am considering a hot roof which I have read would require an airtight insulation assembly I'm considering stacked and sealed 2 or 3" polyiso for this reason and wondering how stacked solid...
  2. Insulation
    I have researched all over the internet various methods of insulating and encapsulating my crawl space, but have not found an exact situation like mine and would appreciate feedback from those who have a lot of experience with crawl space insulation and encapsulation. My house has a crawl space...
  3. Roofing/Siding
    I am re-roofing a flat roof which currently has ponding water in two areas. I have a proposal from a roofing contractor I like to use a tapered PolyISO insulation with a PVC membrane on top. The PolyISO is a standard Firestone ISO product with 20 psi compression strength. My concern is that...
  4. Roofing/Siding
    i am going to replace my rubber flat roof and i am trying to decide between 1) white vs. black 0.60 mil epdm membane, and 2) 1" or 2" of polyiso insulation underneath the epdm. I live in a 100y.o house and the 3rd floor (top) is HOT and stifling in the summer. I thought maybe adding...
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