Basement Window Leaking Under Deck

Here s what you can do to keep as much water away from your house as possible.

Basement window leaking under deck.

Likewise the problem probably isn t due to the age or installation of your windows. Water wicks inside on those bolts or tubing. It doesn t look like the builder did anything to seal this window. It is a regular water highway.

There is a slight gap between that ledger board the one you are looking at bolted against the house and the house itself. 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. The water level that night was about half way up the window. 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.

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. Under the deck there is plastic and then gravel about an inch. During the winter months blowing snow sits on top of the porch then on slightly warmer days it melts and leaks into the basement. Looking from the inside it looked like an aquarium.

Someone noticed that water had been getting inside and caulked things up. The water leaking down saturates the wood between the tongue and groove. Not sure how it pooled up that quickly under the deck but it did. The first things to are your gutters and window well.