What does R-13 mean for my walls?

R-13 is the thermal resistance rating, suited to 2x4 wall cavities. It is not enough for 2x6 walls, attics or very cold climates, where higher R-values are used.

Does the kraft facing need a separate vapor barrier?

The facing is a vapor retarder, so it replaces a separate sheet in many wall assemblies. Check local code, since some areas require a specific retarder class or a different approach.

How much area does one roll cover?

At 15 inches wide and 32 feet long, one roll covers about 40 square feet. Divide your wall area by that to estimate rolls, then add extra for cuts and waste.

Is it safe to handle without special gear?

It is formaldehyde free, but it is still fiberglass. Wear gloves, long sleeves, eye protection and a mask, and keep it away from skin and eyes during installation.

Can it be used in ceilings or attics?

It can be installed there, but R-13 is low for attic floors and ceilings in most climates. Use a higher R-value product for those areas.

How does it compare with unfaced rolls?

The kraft facing adds a vapor retarder and a staple flange, which unfaced rolls lack. Unfaced rolls are better where you add insulation over existing layers or where no retarder is wanted.

Knauf Performance+ R-13 Kraft-Faced Fiberglass Insulation Roll 3-1/2" x 15" x 32'

Q: Where is the Knauf Performance+ R-13 Kraft-Faced Fiberglass Insulation Roll 3-1/2" x 15" x 32' cheapest?

At Arbor, for $27.97, 24% under what the other stores charge, as of our latest check.

Q: Where can I buy the Knauf Performance+ R-13 Kraft-Faced Fiberglass Insulation Roll 3-1/2" x 15" x 32'?

12 stores we checked sell it, including Arbor, Woodson Lumber, Family Hardware, Do it Best, Carr Hardware.

Best price now

$27.97at ArborChecked 17 h ago

24% under what the other stores charge

Compared across 12 stores. Prices are checked against each store and labelled with when.

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Knauf Performance+ R-13 Kraft-Faced Fiberglass Insulation Roll 3-1/2" x 15" x 32'

Best price now

Knauf Performance+ R-13 Kraft-Faced Fiberglass Insulation Roll 3-1/2" x 15" x 32'

Best price now

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