Summer is the perfect season to check windows to make sure they are airtight. While the weather is still warm, conduct a window review and seal all gaps so the windows are prepared for the cooler upcoming temperatures. You will be happy you did this when you are warm and snug inside the house during a blizzard rather than outdoors sealing windows so the howling wind and blowing snow do not enter.
You will need:
Step 1: Determine whether a draft of air is flowing through closed windows. Light the candle and hold it close to the seams in the window. A bending flame may indicate the presence of a draft.
Step 2: Look at the caulk present on the outside frame of the window. Summer heat frequently dries out exterior caulk. If there are numerous cracks and gaps, re-caulking is recommended.
Step 3: Use the caulk softener to assist with removal of existing caulking. Apply it two hours or more in advance of working on the area. Once the existing caulk has softened enough, a five-in-one tool or putty knife should easily remove it. Remove as much caulk as you can so the new caulk can adhere directly to the window and provide a nice seal.
Step 4: A single tube of polyurethane caulk should be able to handle small gaps as well as large ones on an entire window. Use scissors, knife, or the designated area on the caulk gun to cut a 45-degree angled tip off the caulk tube. Load the caulk tube into the caulk gun.
Step 7: Use the wet rag to clean the surface and the towel to dry it. Ensure that no old caulk remains. Push the caulk gun along the seam of the window frame, using a smooth motion. Move slower to fill large gaps with caulk. Run a wet finger along the area to smooth the newly applied caulk and make the job look clean and finished. Excess caulk can be removed with the towel.
Step 8: Follow these steps for each window. Allow 12 to 15 hours for the caulk to dry and set. Review your work and apply additional caulk to any gaps or cracks that remain.