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How To

Wall Stud Insulation

Preventing Cold Floors

Insulating Wall Cavities

Metal Building Insulation

How To: Insulate between wall studs in New Construction

Insulation on wall studsIf you want the tightest, most efficient and comfortable house possible then you need Handi-Foam Two-Component Foam Spray Insulation in your walls. Consider that heating oil is priced at nearly 2.00 /gallon and the slight extra cost of adding foam to your renovation or new home project becomes insignificant. Unlike fiberglas batts, sprayed foam between the wall studs provides a complete air barrier plus R-7 per every inch of cured foam. Handi-Foam is a closed cell product that repels moisture. This feature prevents mold and mildews from taking hold in your walls. For the slight additional cost of foaming your walls you receive a tight, draft free home that is much more economical to heat or cool and also provides a barrier to moisture, insects and exterior noise. For insulating existing closed wall cavities please see our product description for Handi-Foam SR Slow Rise foam.

The ultimate insulation job would be to completely fill the space between the studs. A more economical approach would be to spray 1” of Handi-Foam between the wall studs then finish with a 3-1/2” fiberglass batt. By using an initial layer of foam you can greatly improve the efficiency of your insulation by blocking the passage of air through your walls. This 2 step approach will yield a minimum R-18 in a 2x4 wall and in a 2 x 6 wall you can go with an R-19 batt for an R-26 rating. To calculate the number of kits needed to do your job, divide the total square feet to be sprayed by the board feet capacity of the Handi Foam kit.

Example: 16” (1.25 ft) wide a 9 ft tall between the joists. Total area between the wall studs = 11.25 square feet. You have to insulate between 50 studs for a total of 563 square feet. ( Divide 563 S.F. by our II-605 Kit (605 board foot kit) = less than 1 kit needed with a little left over for touch ups if required. This calculation is based on achieving a consistent 1” depth of cured foam. Please see this video for an illustration of the proper spraying technique for insulating between wall studs using a Handi-Foam kit.

Watch the video.

  

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