Things You'll Need
Fiberglass insulation batting
Staple gun
Utility knife
Straightedge
Plastic sheeting
Power drill
Insulation blower
Blown insulation
Tube of window caulk
Caulk gun
How to Insulate a Garage. Many people want to convert their garages into workshops or an extra living space. However, unlike houses, garages are rarely insulated. Follow these steps to prepare your garage for year-round use in any climate.
Insulate Exposed Walls
Step 1
Place insulation in between 2" x 4" wall studs. The insulation should be attached to the 2" x 4" studs with the insulation facing away and the paper side visible.
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Step 2
Staple paper edges to the 2" x 4" studs every 12 inches.
Step 3
Cut insulation to fit, using a sharp utility knife and a straightedge. Make sure there are no gaps in the insulation.
Step 4
Repeat for each gap.
Step 5
Pull vapor seal plastic film tight and staple at least every 12 inches. Start at the top of one corner of the garage.
Step 6
Overlap the sheets by one complete cavity, working around the entire room.
Step 7
Trim out the plastic from over windows, doors and electrical boxes using utility knife.
Step 8
Staple around the windows, doors and electrical boxes to ensure a tight vapor seal.
Insulate Walls That Have Been Drywalled
Step 1
Drill a small hole in the drywall between the studs at the top of the wall.
Step 2
Blow insulation into gap, using slow-curing foam or fiberglass insulation. There are many makes and models of insulation blowers. Follow the manufacturer's directions at all times.
Step 3
Repeat for each gap, moving around the room.
Seal Windows and Doors
Step 1
Insert caulk tube into caulk gun.
Step 2
Snip off tip of caulk tube with a utility knife.
Step 3
Gently squeeze caulk gun handle as you move along the seam of each area. Apply caulk around all window and door frames.
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