Resealing the Glass in a Sunroom

Examine the windows for any sign of breakage or damage. This inspection should also include a look at the existing frames. You need to ensure that no wood rot has taken place. Also, if any of the surrounding material appears to have deteriorated, replace it before proceeding with any attempts to reseal the window. In older sunrooms, where wood rot may occur, use an expanding foam sealant in the existing window frame anywhere you find gaps or any indication of deterioration.

Clean the windows around the window frame. This should be done on both the inside and outside of the window to ensure that any sealants that are used will adhere. Use a putty knife or a utility knife with a razor blade to scrape the window free of any existing debris, especially any old caulk around the edge of the window. Clean the glass with a high-quality window cleaning agent, as well.

Apply caulk around the edges of each window pane. This should be done around all edges of each window where the edge contacts the window frame. Caulk will come in a variety of colors. White is the most common, but you can choose one that matches your home's color scheme and decor if necessary. Caulk is usually applied with a caulk gun -- although you can buy it in squeeze tubes, as well. Ideally, you should purchase a silicone caulk sealant to waterproof the windows. Allow the caulk to dry. Silicone and other modified versions of silicone caulk can dry overnight, but some can take one or two full days to dry. Polyurethane-based sealants need about three to 10 days to fully dry and cure.

Add foam weatherstripping during the winter if you live in a cold weather climate. Foam weatherstripping is nothing more than a soft foam material that serves as an insulating barrier that can be attached around the edges of windows and doors to cut down on any air loss or flow into the home. Most weatherstripping has a self-adhesive backing that can be directly applied to the window.