Replies

1. 
   Erik Haugsjaa | Dec 22, 2017 01:04pm | #1

   How about fasteners instead of adhesive... like Marc Rosenbaum did here: http://blog.energysmiths.com/2011/08/basement-insulation-part-3.html

2. Expert Member
   Dana Dorsett | Dec 22, 2017 01:36pm | #2

   If it's not too late, change the rigid foam to polyisocyanurate (fiber or foil faced), which has a much lower environmental impact, and a comparable or higher R/inch. XPS will eventually fall to R4.2/inch (same as EPS) as it loses it's HFC blowing agents (powerful greenhouse gases with greater than 1000x CO2 potential at 100 years. Polyiso is blown with pentane (~7x CO2). Polyiso also won't melt into a flaming puddle in the event of a fire the way XPS does.

   If your basement walls are measuring under 40F, raising the temperature of the basement with space heaters can usually take care of that.

   (Erik- is J. racing in the WaWa night league again this year? Sure beats bowling! :-) )

3. GBA Editor
   Martin Holladay | Dec 23, 2017 05:18am | #3

   Mike,
   I'll echo the previous suggestions: either use heaters to raise the temperature of the space, or switch to mechanical fasteners.

4. 
   gusfhb | Dec 27, 2017 09:34am | #4

   I recently used Sikaflex and PL Plus polyurethane construction adhesive in the 30's with no apparent problems. Neither melts XPS

5. 
   gusfhb | Dec 27, 2017 09:37am | #5

   Oh, and I used a 'T nailer' to hold the foam up while the adhesive set. Not fit for a finished look like the fasteners Marc used, but I was covering it anyway