It is possible for moisture and air leaks to enter through these fine lines and seams wreaking havoc behind the siding that you may not even notice until significant damage has already occurred.
Water leak behind vinyl siding.
Inspect the area above the leak including both indoors and out.
Leaks in other areas of the home besides windows and doors are not as common as they may be for homes with wood siding but they still may happen.
In this video this old house general contractor tom silva shows how to prevent water from leaking in behind vinyl siding.
Wind blown rain entering the siding bottom edge vent drain openings present on most aluminum or vinyl siding can pass behind the siding through those openings.
It s virtually impossible to completely seal any siding without additional materials.
Vinyl siding is designed to allow the material underneath it to breathe.
Siding leak diagnosis and repair.
If you do find such an area remove the siding and inspect the walls behind it to determine how the water is getting in.
If an installer uses a material such as incorrectly this only exacerbates the problem.
How to prevent water from flowing under vinyl siding.
In terms of siding this means layering sheeting flashing house wrap caulking siding and trim.
This article describes the causes of all types of leaks in building siding and wall coverings.
When siding is put back behind the gutter the lowest piece of flashing running down the pitch of the roof above must be fashioned to divert water into the gutter not behind the siding.
Vinyl siding itself is waterproof and directs most water flow away from the exterior but even a small gap can allow water through.
Therefore it is not a watertight covering.
Because of its design and application it provides a supplemental rain screen that enhances the water resistive barrier system by reducing the amount of water that reaches the underlying water resistive barrier.
This is a normal condition of these siding products not present on hardboard fibercement board shingle type siding nor plywood sheet siding and is a reason that these siding.
Using detailed examples and photos of leaky building siding siding stains ice or other leak clues for vinyl siding we illustrate the installation mistakes or subsequent siding damage that can cause troublesome even dangerous leaks into a building wall or wall.
Although vinyl is impervious to water when installed as directed by the manufacturer vinyl siding as a whole is not completely watertight.
Despite the good qualities of vinyl it does pay to have extra insurance in the form of house wrap.
