How to Install Styrofoam Insulation for Garage Doors

Garage doors can be a serious source of heat loss. Even if you don't keep your garage heated, if the garage is connected to the house you can improve your home's efficiency by insulating the garage door and turning the garage into a buffer between the cold outside and your home's interior. If you do heat your garage, it's even more important to insulate the door. Otherwise, you'll be spending money to heat your driveway.

Measuring tape
Utility knife
Construction adhesive
2-inch-by-4-inch lumber
Cinder blocks

Instructions

- 1
  Measure the length and width of one garage door panel.
- 2
  Measure a piece of rigid foam insulating board to fit the measurements you took in Step 1. Cut the panel to these dimensions using a sharp utility knife.
- 3
  Spread construction adhesive onto the face of the rigid foam board, using a zigzag pattern to get consistent coverage.
- 4
  Press the foam board against the surface of the door panel so the adhesive makes solid contact with the door.
- 5
  Maintain the pressure of the foam board against the door by extending several 2-inch-by-4-inch boards at a diagonal from the foam board to the garage floor. Brace the bottoms of the boards with cement blocks so they can't move. Leave them in place overnight to give the adhesive a chance to dry thoroughly.

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