How to Apply an Insulating Window Film

By Gene and Katie Hamilton

Tools Required
  • Spray bottle
  • Squeegee
  • Break-away utility knife
  • Single-edged razor blade
  • Tape measure
  • Soft, lint-free cloth or paper coffee filters
  • Transparent tape
Materials Required
  • GILA® Film
  • GILA® Film Aid application concentrate
  • Bottled (not tap) water

Before You Begin

Measure the windows of the rooms where you are going to apply window film to determine how much film you will need. Measure the inside exposed-glass dimensions of each window pane and buy up to 15% more than you think you need. In case of a mistake, it will save you a return trip to the store.

Plan to apply the film in the evening or morning, when the glass is cooler and not facing the sun. The warmer the glass, the faster the film adheres. Be sure you have everything you need to properly apply the film.

These are instructions for applying residential GILA window films, which are compatible with standard 1/8-in. clear residential windows. Follow the manufacturer's directions to prepare the concentrate solution. And protect the floor beneath the window with a drop cloth.

Don't want to do the job? Click here to get to Home Advisor and it will open in a new tab and you’ll have to answer some basic questions about your job followed by Handyman Contractors in your area.

  • Step 1 : Measure the window

    Measure the window

    Measure the dimensions of your window carefully before unrolling and cutting the film. Film may be applied from side to side, or top to bottom from the kit roll.

  • Step 2 : Clean the window

    Clean the window Generously spray the window with the concentrate solution. Then use a squeegee to clean the windows thoroughly. Respray the glass, then use a razor blade to remove any caked dirt or paint. Use special care cleaning the corners.

    Clean the window Re-wet the window, then squeegee downward. Wipe off accumulated dirt from the window gasket with a soft cloth or paper coffee filters.

    Page 1 of 3
    Go To Page 2