Problem: Converting Deck To Floor - Insulating

Dadx4

Having an issue deciding how to best insulate a second storey 12 x 12 deck floor that will be converted to additional living space. We need to insulate the floor system in the best way possible as we live in a cold climate and the area under is unheated/outside.
The floor will not have heating ducts running through it as we can use alternate (electric bb ) for that area or a gas f/p .
Best methods?????

greg24k

You should visit DIY chat room, this site is for proffessional contractors only.

Good luck.

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naptown CR

how about installing insulation?

Dadx4

haha . Thanks , but that was a given. My issue is not wether to insulate - but proper ammount and method , placement of vapour barrier etc.
Since the deck joists are 2x10, my understanding is that if I use a spray foam and completely fill the joist cavity, it also acts as the vapour barrier - but how about cost?? It should be warm enough.
Alternately, If i use batt insulation and fill the void completely, should I then install a rigid polystyrene to the underside ? This puts the Vapour barrier on the cold side which is not recommended????

naptown CR

Check with the IRC and leeds. Then go back to the diy room The last post proves you are not a pro

greg24k

I would use a GOOSE DOWN COMFORTER Blanket to get that warm and cozy feeling in the winter time, I wouldn't worry about anything else.

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