How to Weatherstrip your Windows

Referenced from: Energy.gov

This easy project will result in 5-10% in energy savings! Once you have the materials, all you need is  a spare hour to do this project! Before you start, add up the perimeters of all your windows and add about 10% extra to that number. Besides V-channel weatherstripping, you will need self-adhesive foam insulation, a utility knife, measuring tape, soap & water, finishing nails, and a hammer. 

Follow these steps:

  1. Clean the inside edges that will be weatherstripped with soap and water. Wait until it' s all dry before going to step 2. 
  2. Measure each side of the window again and then cut the material, giving yourself an extra inch for each side. 
  3. Open the window all the way.
  4. Peel the backing off the V-strip BUT leave the extra 2 inches from the end) Press the adhesive side of the strip to the inside of the window frame (into the groove that the sash fits into). Fold the material over and stick the extra inch (with the backing on) up under the sash. Drive the finish nails through the weather stripping into the jamb to hold it securely. Test the sash to make sure that it won't catch on the nails
  5. Repeat step 4 on the opposite side of the jamb. Then close the window. 
  6. Remove the backing from the extra inch of weatherstripping and press the adhesive in place. 
  7. Lower the outer sash as far as it will go. Install the weatherstripping the same was as you did for the inside (on both sides of the window). Also apply the weatherstripping to the top of the outer sash.
  8. Put the outer sash back in place. Open the lower sash once more, and install the weatherstripping on the bottom edge.  The V should be open facing upwards so the material condenses when the window is closed.
  9. Congratulate yourself on a job well done!
New York Energy Audit