Basement Window Leaking Under Deck

Under the deck there is plastic and then gravel about an inch.

Basement window leaking under deck.

Water wicks inside on those bolts or tubing. Here s what you can do to keep as much water away from your house as possible. Looking from the inside it looked like an aquarium. Poor drainage around your home can allow water from rainfall melting snow or the ground to fill your window wells and enter into your basement.

Don t blame basement window leaks on the amount of rain. If it does solve the problem your choices are to leave the plywood in place or replace it with a plastic window well cover if there is enough room below the deck. During the winter months blowing snow sits on top of the porch then on slightly warmer days it melts and leaks into the basement. But because the window is under a deck and can t serve much purpose the best approach would be to have it bricked in and waterproofed from the outside and have the well removed.

The tight space blocks air flow and keeps the wood damp leading to rot and decay. Likewise the problem probably isn t due to the age or installation of your windows. It is a regular water highway. The water leaking down saturates the wood between the tongue and groove.

Wellduct drains water from the window well before it can leak through the basement window. It doesn t look like the builder did anything to seal this window. The water level that night was about half way up the window. The first things to are your gutters and window well.