Adding more insulation under post supported addition

I had an addition put onto the house last year, which is on posts (the rest of the house has a basement). The addition was spray foamed between the joists, and then sealed up with plywood. I’m still finding the floor pretty cold during winter (-20°C/-4°F), and wonder if I can add any additional insulation and a vapour barrier? Could I attach rigid panels directly to the plywood, and spray expanding foam between the panels (intentionally leaving a small gap to fill?) What’s a good way to go about this? submitted by /u/GivinItTheCollegeTry [link] [comments]

Feb 16, 2025 - 13:53
 0

I had an addition put onto the house last year, which is on posts (the rest of the house has a basement).

The addition was spray foamed between the joists, and then sealed up with plywood. I’m still finding the floor pretty cold during winter (-20°C/-4°F), and wonder if I can add any additional insulation and a vapour barrier?

Could I attach rigid panels directly to the plywood, and spray expanding foam between the panels (intentionally leaving a small gap to fill?) What’s a good way to go about this?

submitted by /u/GivinItTheCollegeTry
[link] [comments]