2007-10-06 15:45:05 · 9 answers · asked by jurassicbeaver 2 in Home & Garden ➔ Do It Yourself (DIY)
You would have to put r-14 in the walls and then 1'' foil face 4 x 8 sheets on the exterior wall, that would get you to 20.5 R. Thats the only way to get you there that I know of, if you put more standard fiberglass insulation in a 3.5'' wall it would just be a waste, the effectiveness of it comes from the thickness.
2007-10-06 19:14:27 · answer #1 · answered by Jerry 1 · 0⤊ 0⤋
R-21 Insulation
2016-12-16 06:08:20 · answer #2 · answered by blacker 4 · 0⤊ 0⤋
In NJ R-13 are required on 2X4 exterior walls.
2007-10-06 17:46:17 · answer #3 · answered by alaraconstruction 1 · 0⤊ 0⤋
R21 Insulation
2016-10-06 07:10:00 · answer #4 · answered by ? 4 · 0⤊ 0⤋
For a 2 X 4 wall you can use either R12 or R14 batts of insulaion. If you use any thicker you can bulge out the drywall and make the screws/nails pop into the wall. What I'm saying is you can make your wall look like a balloon if you pit in too much insulation and when insulation is packed tight it no longer insulates properly.
2007-10-06 17:28:37 · answer #5 · answered by albertaguy7 3 · 0⤊ 1⤋
Insulating the interior walls will cut down on the amount of noise that is transmitted between rooms in your house. Great idea if you have kids. You can also insulate the floors if you have a 2 story and or a basement.
2016-05-17 22:33:28 · answer #6 · answered by rosie 3 · 0⤊ 0⤋
R-21 in walls. Must get cold where you live. Thought about foam in place urethane? There are other options, use the other guy's link.
2007-10-07 05:41:11 · answer #7 · answered by Charles C 7 · 0⤊ 0⤋
Below is a link that took me just seconds to locate. No offense; but I wonder why so many who come here don't use the WWW for it's best purpose.
2007-10-06 16:06:43 · answer #8 · answered by DIY Doc 7 · 0⤊ 0⤋
Yes, the fiberglass blankets will just compress.
2007-10-06 16:06:10 · answer #9 · answered by Anonymous · 0⤊ 0⤋