DIY Hurricane Foam Adhesive

Evaluate your attic. You'll need to get all the foam adhesive down in one session to avoid the adhesive drying in the tubes of any extensions you use. To minimize cleanup, plan the job. Find out if you will need extra long air gun extensions to reach the corners of your attic where the roof meets the floor, or long planks to stand on while performing the job. Check if the nails that hold down any shingles are poking through the sheathing. If so, you may need a helmet. If you will need extensions, place them in a place where they will be easily accessible.

Set up the compressor. Attach any air tubes to the caulk gun and the compressor. Read the specifications for the adhesive when using it with a compressor, and adjust the compressor to match the recommended pounds per square inch. Do a dry run to ensure that the adhesive gun can reach all recesses of your roof.

Seal your roof. Cut the tube of adhesive so that you can apply a 1/4-inch bead. Apply the adhesive to all places where the sheathing -- the plywood that the shingles are attached to -- meets the trusses and rafters. Coat all areas where the sheathing meets other sheathing. Then, using the extension, apply adhesive to the area where the sheathing meets the floor of the attic.