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BDR
Insulating 2x4 walls

I am remodeling my dinning room and have removed the old wallboard. It is 2x4 construction which does not allow for very much insulation. Would it be a good idea to install 1 inch thick rigid foam insulation between the studs and then add faced R13 fiberglass over the foam?

JLMCDANIEL
Re: Insulating 2x4 walls
BDR wrote:

I am remodeling my dinning room and have removed the old wallboard. It is 2x4 construction which does not allow for very much insulation. Would it be a good idea to install 1 inch thick rigid foam insulation between the studs and then add faced R13 fiberglass over the foam?

R13 fiberglass is made to be installed in 3½"space, the more you compress it the less effective it is. Have you considered spray foam insulation, I believe it would be a better choice.
Jack

Re: Insulating 2x4 walls

If you have 2lb closed cell foam installed into the cavities that you have opened, you will get about a R-21. This will become one of most comfortable rooms in your home. The foam will also add structural integrity to your structure.

Go with the 2lb Closed Cell Foam - you will be glad you did.

ed21
Re: Insulating 2x4 walls

Another option is to put back 3 1/2" batt insulation in the wall, 1/2" or 3/4" rigid foam on the studs, then drywall directly over the rigid insulation.

BDR
Re: Insulating 2x4 walls

Thanks for the info.

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