Water Under Vinyl Siding

Since water runs downward unless it s being driven by strong winds the standard method for.

Water under vinyl siding.

Vinyl is the rare siding product that remains completely unaffected by water behind it. Check to be sure weep holes are open along bottom of window openings. Before the vinyl siding is installed on the house a waterproof underlayment called house wrap must be placed on the osb to prevent water from seeping through the siding and reaching the osb where. Vinyl siding may permit moisture below the surface the main purpose of cladding like roofing is to keep water out of your house.

It is a misconception that vinyl siding doesn t need a water. Inspect the area above the leak including both indoors and out. Before installing vinyl siding over existing wood siding or wall sheathing the wood must be dry and in good condition. Water vapor may move through the wall construction but it can escape during colder weather.

Wood siding and other traditional cladding materials allow the wall to breathe. Rainwater from missing or improperly placed gutters can end up. If the builder failed to install a weather barrier this sort of staining is more likely. In reality although the vinyl material itself is waterproof the numerous seams and gaps that occur during installation aren t.

Tracking down the leaks in a vinyl sided building. Some contractors that favor vinyl may go so far as to say it s borderline waterproof. See water barriers exterior. How to prevent water from flowing under vinyl siding gravity and shedding water.

Vinyl siding itself is waterproof and directs most water flow away from the exterior but even a small gap can allow water through. That can be a virtue and a vice. Lack of gutters installed on the top roof of the home. Installing insulation over moisture or existing rot can create larger headaches later.

Use a caulking gun to apply a continuous bead of silicone sealant along the vertical seams between the vinyl. Flashing or caulking if installed which is rare would be of no. Vinyl siding requires special inside and outside corner units in addition to the trim that. The most common causes of water damage behind vinyl siding include the following.