• Chris Engelman

How to Insulate Your Windows and Doors Yourself.

Updated: Oct 29, 2018

What you will need:

  • Great Stuff Window and Door Insulation ( one can for every two doors or 4 windows)

  • Window and Door Caulk  ( I recommend buying two just to have an extra)

  • Razor blade and caulk tool

  • Small prybar

  • Hammer

  • Nails

  • Nail punch


  • Rags

  • Gloves

Now we have what we need, we can get started!

I remember my dad doing this with me when I was about 10 years old and we just had moved to a different home. We went through the house and made sure every window and door was insulated correctly. Hope this blog helps you. Enjoy.

Remove molding

Using your knife, cut the old caulking to break the seal and use the small prybar to slowly and carefully remove the molding around the door ( it is important not to break the molding because you will use it). Hammer in any old nails and scrape off any old caulking that is left.

Insulate door or window

Using uour great stuff spray foam, spray this between the door and the wall to close off any cracks or crevices air can get into your home. Let this dry for a few minutes then move on to the next step. (one tip is after the can has been used, it is only good for about an hour.Make sure to have all doors and windows prepped and you can spray them all at one time).

Replace Molding

Now you are ready to replace the door molding back where it was. Using your trim nails and hammer, starting with the sides first, put the nails into the molding and hammer them in. Using the nail punch, make sure to hit the nails in a little deeper than the surface of the molding. After the nails are in, put a little bit of caulk over the hole so you cant see the nails anymore.

Caulk Around the Molding.

Using your bottle of caulking, make a nice bead along the seams on both sides of the molding. Wet the rag and make sure to remove any extra caulk from the sides or on the molding before it dries.


Now that you are finished, you can relax in your home and have no more drafts or outside air coming into your heated or cooled living space.

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By Chris Engelman



2 Merry Ln, East Hanover, NJ 07936, USA