Replies

1. 
   finefinish | Jan 09, 2019 08:11pm | #1

   Hey there Steve, I think the PL formulated for foam has pretty fast grab.  Are you installing on top of the roof deck before finishing with shingles, or are you cutting to fit between the rafters on the underside of the roof deck?  

1. 
   Sawdust_Steve | Jan 10, 2019 08:23am | #2

   I'm cutting it to fit between rafters. Have already finished two of the walls and am now moving onto the roof. I'm worried that the stuff formulated for foam doesnt have a quick enough grab and will let go and fall down. I guess that the best test is just to try.

1. 
   DanH | Jan 10, 2019 08:45am | #3

   Used to be, back in the stone age, you held up pieces of batt insulation with lengths of stiff steel wire, cut to length so they would jam between the joists.

1. 
   Sawdust_Steve | Jan 10, 2019 09:53am | #4

   Well I'm not doing that if I dont have to. Way too much work

1. 
   DanH | Jan 10, 2019 12:44pm | #5

   Too much worki???  You pre-cut the wire pieces about half an inch "too long".  It takes all of about 10 seconds to jam one into place.

2. 
   finefinish | Jan 12, 2019 06:21pm | #6

   Hey Steve, we usually rip the foam on the table saw for a friction fit.  If the panels don't stay up by themselves a half sunk hand nail into the side of the rafter on either side works too.  We can foam the panels' edges too after which helps hold them up.  

1. 
   Sawdust_Steve | Jan 14, 2019 10:34am | #7

   Thanks finefinish. I've been ripping on the table saw for the walls and it's working fairly well there. The roof is wider and the friction thing wont work.