DIY: How to Weatherproof Windows

The approach of colder weather signals the need for weatherproofing windows. A large amount of heating energy is lost through insufficiently-sealed windows and drafts that come in from the outside. This is a step-by-step method of how to weatherproof windows.

Items needed to weatherproof windows:

Tape measure

Plastic sheeting, preferably wide enough to cover window plus extra for mounting, approximately ¼ to ½ inches extra on each side.

(Thinner mil sizes are acceptable for inside installation; thicker mils may be needed on outside installation; clear plastic is preferable)

Double-sided tape

(various types available; double-sided carpet tape is better in many cases)

Duct tape

(Optional: for securing outside installation for weatherproofing windows)

Scissors, utility knife or other cutting tool for plastic

Staple gun or hammer and small nails, thin wood or furring strips

(Optional: for securing outside installation for weatherproofing windows)

Hair dryer

Ladder

How to weatherproof windows indoors:

Step One:

Clean dirt and/or debris from window trim when weatherproofing windows. Do one window at a time.

Step Two:

Measure window size, allowing for mounting of tape to window trim or exterior surface. Cut length of plastic to size to weatherproof windows.

Step Three:

Cut length of double-sided tape for top of window. Remove backing of on one side only, apply double-sided tape to window trim as straight as possible. Lift corners of tape backing and apply plastic to exposed tape surface, stretching plastic slightly for secure fit. Remove remaining tape backing and press plastic into place.

Step Four:

Repeat step 3 for each side of window to weatherproof windows, stretching and fitting for an even surface. (Note: final fitting of plastic with hair dryer can take care of looseness; do not over-stretch plastic to prevent tearing).

Step Five:

Repeat step 3 for bottom of window. Trim off any excess plastic using cutting tool. Use hair dryer at medium setting to shrink-fit plastic. Keep hair dryer 2 to 3 inches from plastic surface and use a brushing motion to avoid burning and melting of plastic.

How to weatherproof windows outdoors:

Repeat steps 1 through 5 above to weatherproof windows outdoors. Heavier mil plastic can be used, if desired. Further weatherproofing to protect against wind and rain/snow damage can be accomplished by adding duct tape or wood or furring strips on top of edges of plastic.

Optional steps for weatherproofing windows:

Plastic can be attached on outside windows using staple gun, if desired.

Wood or furring strips can be attached using hammer and small nails. Headed nails are best, but finish nails can be used by bending heads over with hammer.