Insulating a floor

Issue 7

In “Truss Frame Construction” (FHB #5), Mark White describes a way of holding up insulation with twine so it can easily be installed from above. Here’s an alternative method we used to support 10-in. friction-fit batts in the floor of an addition with a 2-ft. crawl space. First we stapled light-gauge chicken wire to the underside of the floor joists, using 9/16-in. staples. We then dropped in the batts, installed a plywood subfloor and continued framing. The insulation process is fast and easy, with little discomfort to the worker. And the insulation “breathes” well with standard venting.

Doug Jackson, Mission, None

Fine Homebuilding Recommended Products

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Disposable Suit

This suit provides full body protection to help you stay clean from head to toe when installing insulation. We recommend wearing sweats underneath for additional coverage.

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Nitrile Work Gloves

Do yourself a favor and protect your hands while you work. These lightweight, breathable work gloves will keep your hands safe while cutting and fitting.

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Great Stuff Foam Cleaner

It’s important to clean and maintain a professional foam-dispensing gun, and this product fits the bill. It has a spray applicator for general cleaning, plus it screws onto the dispensing gun so you can clean the inside.

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Insulating a floor

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