I cant even imagine what construction/decking/sealing would be used for a situation like that which must be why it's been leaking for all these years, not to mention the noise of someone walking around on the deck.
Foam would be the best but might be cost ineffective for just a small area. Blown in cellulose would be next option followed by batts.
If you did that you would use one layer of R19 and one layer of R11 so that its not overly compressed. You lose replies value when you compress insulation.
The bigger concern is how that deck is going to be waterproofed! That's got to be someone's retarded idea of a bonus room. (Should never have been done)
To fill 7 1/2 inches deep you will need 4 packages of the spray foam costing roughly $1500. Are you the one responsible to insulate or is it a shared cost thing with the neighbor?
I have built a gym in my garage in the past year. I didn't want to paint the walls in the garage because why? I am lazy and don't like priming & painting. Drywall is still bare in the garage. I have bought Insulating Foam Board and placed it on the walls, with the reflective side facing me. Plus, this is a cheaper solution than to buy primer and paint.
In general, insulation in the attic can cause health issues to the lungs, especially the fiberglass strands. Will these foam boards be hazardous containing some type of cancer agent that I may not know about? Just checking to make sure.
[url]https://www.homedepot.com/p/R-Tech-1-2-in-x-4-ft-x-8-ft-R-1-93-Insulating-Sheathing-320810/202533656[/url]Read More
Our home was built in 2008. The attic has about 14" of insulation. It looks like it was blown-in. The insulation is fluffy like cotton or sheep's wool. Just wondering what type of insulation this is? One of the pictures is a close-up of a small piece of the insulation. Thanks
[img]https://cimg2.ibsrv.net/gimg/www.doityourselft.com-vbulletin/620x465/attic_a_27d24940748ae0fe3dc938b18fb80aa1bfc8abfd.jpg[/img]
[img]https://cimg5.ibsrv.net/gimg/www.doityourselft.com-vbulletin/620x712/attic_fluff_0c3ebac26b57b0cbb9d5f8e3f48c4d1a84c2c785.jpg[/img]
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09-05-21, 12:06 AM
Ceiling/Deck insulation
