Replies

1. Expert Member
   MALCOLM TAYLOR | Jan 10, 2020 11:52pm | #1

   https://www.greenbuildingadvisor.com/article/return-to-the-backyard-tape-test

2. 
   DCContrarian | Jan 11, 2020 05:44pm | #2

   Thanks.

   For the curious, here's the money quote from the article:
   "Foil-faced polyisocyanurate. Foil-faced polyiso is very easy to tape; almost any decent tape will work."

   Tyvek tape it is for me.

3. Expert Member
   Michael Maines | Jan 12, 2020 12:40pm | #3

   For situations where the insulation will be hidden, such as continuous exterior insulation, I like using plastic tape with acrylic adhesive--it sticks well and can stretch; polyiso tends to shrink as it ages and plastic tape will stretch, while foil tape does not. I have not seen any studies on this, it's just a hunch that it could be a problem.

   For basement interior insulation, I often spec white foil-faced Thermax with all-white foil tape, for a neat finished appearance. I have not found an all-white plastic tape.

1. 
   DCContrarian | Jan 12, 2020 09:50pm | #4

   Here is an all-white plastic tape that I like:
   https://www.amazon.com/gp/product/B000SPTS82

4. Expert Member
   Michael Maines | Jan 13, 2020 08:54am | #5

   Thanks DC! I have spent a lot of time looking for a tape like this, even on 3M's website.