insulation on outside wall of bathroom
rp1137
| Posted in Energy, Heating & Insulation on
I have an insulation question. The bathroom on the main floor of my house actually extends out into the garage. The bathroom is always cold in the winter. The outer wall of the bathroom is concrete block. As it is in the garage I could easily put a styrofoam type insulation on the outside wall. Will it help? What type of insulation should I use?
Thanks
Replies
Dow and I believe Owens Corning (pink) makes............
rabbited out 1-1/2" styrofoam that is set to receive 1x3 furring strips (the rabbit so there's 3/4" styrofoam behind the furring. 2' wide x 8' panels. You could still go ahead and use 1/2'' board, there's styro to back it (you could spot glue with the right adhesive if you wish).
Works well if you can afford the extra 3/4" more than furring will take up.
Edit: And welcome to breaktime. I'll hunt up a link and post in a bit.
http://building.dow.com/na/en/products/insulation/wallmate.htm
http://insulation.owenscorning.com/professionals/insulation-products/insulpink.aspx
These are not high R-value, but divorces the cold block wall from the interior space. If it were winter and you were sitting at a football game on cold concrete (or aluminum bleachers)-you could do this test. Take a 3/4" pc of styroboard and sit on that. It holds the heat on your butt. Not scientific, but something to use the scrap for.
It's worth a shot, with some sort of foam insulation.
Note that the foam would have to be covered with a fireproof barrier at a bare minimum (5/8 drywall, taped), and the local code guys may have other concerns.
covered with a fireproof barrierat a bare minimum 5/8 drywall
Dan, are you sure on the 5/8 and firecode board?
I know the foam needs covered, but am unsure on the 5/8's. The block gives it separation from the garage, so that part of the code requirements are met.
Not 100% sure, but I wouldn't be surprised. Having a flammable material against the block likely negates some of its fire rating, plus there's a danger that flames from the foam would rise up through the roof and get sucked into the attic of the house.
Covered yes, but 5/8's firecode?
And I'm thinking that with his lid already on that room, the flame/smoke spread is already taken care of. Compromised block by the foam? If that was the case they'd block foamboard inside, outside, against the foundation, in the coolers stacked in the garage.
Probably eliminate most carpet, furniture, drapes, vinyl siding, asphalt shingles........................
If someone can confidently answer the thickness of covering over foam according to the latest accepted codes in their jurisdiction, I'd appreciate it so the guy can catch a good nites sleep.