This is especially true during wind driven rain when high air pressure forces water to flow through small openings at siding joints overlaps nail holes and other gaps see photo.
Water behind wood siding.
The siding made from portland cement sand cellulose and other additives is available with smooth or simulated wood grain finishes.
Inspect the area above the leak including both indoors and out.
As water flows off the roof it is important that it is channeled away from the headers using flashing.
Rainwater from missing or improperly placed gutters can end up behind siding.
How to prevent water from flowing under vinyl siding.
Lack of gutters installed on the top roof of the home.
So if this happens you will need to remove or replace the siding quickly before rot sets in.
It easily hides beneath siding materials and often shows no obvious signs to untrained eyes.
Here the biggest danger is water seeping in behind your siding and causing permanent damage to more vulnerable materials.
Water can also seep in behind faux stone and other external walls around your home.
Although vinyl is impervious to water when installed as directed by the manufacturer vinyl siding as a whole is not completely watertight.
While wood siding brick vinyl and other exterior finishes may appear watertight in fact all residential cladding systems allow some water to penetrate.
Water passing over wood and other building materials but behind the vinyl siding can easily pick up pigments that stain the foundation wall outside.
At yanish we find water damage behind the siding of roughly 1 in 6 homes.
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.
It is a misconception that vinyl siding doesn t need a water resistant barrier system.
Not all have wood rot but the damage would progress to rot in time.
Water damage is risky business.
The damage can compromise a building s structural integrity.
Tracking down the leaks in a vinyl sided building.
Check to be sure weep holes are open along bottom of window openings.
However if the flashing is broke or not properly attached water can seep behind the siding allowing mold to grow.
See water barriers exterior.
If the builder failed to install a weather barrier this sort of staining is more likely.
Planks are 12 feet long x 5 16 inches thick and they come in a half dozen widths which means weather exposures can vary from 4 inches to 10 3 4 inches.