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How to Insulate Windows? - part 2

Time : 2022-09-28 Hits : 3

STEP 2.Window- Sealing the Seams

1.Use foam rubber weather sealing. Trim down self-adhesive weather sealing strips to match the dimensions of your window, then simply stick the strips directly to the inner frame to seal off any spaces along the edges.

l This option is fairly inexpensive and easy to apply, but you'll need to replace the strips periodically. When you peel them away, they may leave a residue or cause chips in your paint, so be prepared to touch up the area if you don't plan on immediately applying another strip.

l The surfaces must be very clean and very dry or the strips won't stick long. On a cold day, these surfaces will be slightly wet from condensation, so dry them with a hair drier. To clean them, use fine sand paper or steel wool.

2.Try rope caulk. Rope caulk comes in the form of packaged strips. Use a knife to cut the strips down to match the length of each window seam, then press each strip into its respective seam to seal the area. Manipulate and press the putty in place using your fingers. If you need to remove the caulk, you can peel it away with your fingers, as well.


3.Apply high-performance sealant. For something a little more durable than rope caulk, use high-performance caulk sealant or low-expansion foam. You can squeeze caulk into the gaps along the exterior side of your window seam using a caulk gun or apply expansion foam to the same seams using a shooter foam gun.

l Apply an even, continuous bead of caulk along the entire exterior seam. You should be able to use it on most building materials. When cured, the sealant should block drafts and moisture, making it resistant to mildew and other fungi. Cured caulk can also be painted.

l When applying expansion foam, test its expanded volume with a small drop placed in the corner of the window. Once you've determined how much it expands, use that knowledge to apply the necessary bead amount around the entire seam.

4.Make a draft snake for sliding windows and steel casement windows. Sew a simple fabric tube to match the width of the window. Fill it with dried rice or polyester stuffing, then place it along the bottom of your window inside your home.

You can also purchase draft snakes or draft snake kits online and at some superstores or department stores. Foam-and-fabric draft snake kits will allow you to customize the snake to fit the length of your windowsill; simply cut the enclosed foam tube down to size and insert it into the washable cover.

When making your own draft snake, note that heavier materials (denim, corduroy, etc.) tend to work better than lighter materials (linen, knits, etc.).

Note that this will only insulate the seam along your windowsill. You won't be able to use a draft snake to seal the top and side seams.

5.Seal the gap between the upper and lower sashes on wooden double hung windows. This is often the main source of air leakage. Large paint drops on either surface create a gap.

l If any thumb latches are missing or broken, replace them. They pull the sashes together to close the gap.

l Scrape off drops of paint on the contacting surfaces of the upper and lower sashes. Lower the upper sash and raise the lower sash as far as they can go. This will expose both surfaces so you can scrape off the paint. If the upper sash can't be lowered, try cutting off the drops of paint by sliding a hack saw blade between the sashes.

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