Insulation, Radiant and Vapor Barriers - Condensing Insulation

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electric1
09-28-05, 06:25 PM
If we have insulation that is designed for 2 x 6's that is R19 in value....is it okay to snug it in place (condensing the insulation) to fit in 2 x 4's? I realize that if you squish insulation in a tight space the R-value is lowered. Thanks!

em69
09-29-05, 05:50 AM
For the insulation to function efficiently, it cannot be condensed. If you compress it, or if the drywall compresses it, then it will no longer function as it was designed.

You are better off installing R-13 which is designed for 2x4s.
electric1
10-02-05, 08:35 AM
Okay thanks, we'll get the right kind.

Also does the ceiling really require a huge R-value compared to the rest of the walls?

Cerestes
10-02-05, 10:53 AM
Depends entirely on where you live.
Search this forum for similar questions.

You'll see the recommended ceiling insulation ranges from R13 to R40 depending on climate.
twelvepole
10-02-05, 08:17 PM
Go to http://www.owenscorning.com/worldwide/canada/HowTo.asp?HowToID=1&Language=1 to learn about insulation. Click the Insulation Calculator and type in your ZIP for recommended amount of insulation in your area.