How To Seal Windows With Vinyl Siding

This prevents any air leakage.

How to seal windows with vinyl siding.

In this case the objects are the perimeter of the new exterior wall and the perimeter of the old open space. Caulk is used to seal spaces between two objects. Many vinyl siding installers do not realize the importance of the house wrap and its job as the sole water barrier because many people incorrectly. If the window is surrounded by wood trim use a high grade polyurethane caulk to seal all gaps between the trim and the siding and the trim and the window.

Caulking windows to give them a finished look inside and out and seal out leaks and drafts is a fairly common diy task. Vinyl siding installs in pieces so gaps and overlaps are normal. Vinyl siding by itself does not create a waterproof seal and care must be. In this video this old house general contractor tom silva shows how to prevent water from leaking in behind vinyl siding.

Inspect the area above the leak including both indoors and out. Sealing these spots with caulking is not possible because the siding must expand and contract freely to prevent warping. To prevent leaks caulk the window where it meets the exterior siding. Remove the pieces of vinyl siding from around the window area.

Check to be sure weep holes are open along bottom of window openings. One of the somewhat more complex steps in the vinyl siding process however is installing it properly around windows. Often water leaks at a window result from a breakdown in the connection between the window frame and the wall.