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Question DetailsAsked on 11/18/2013

Who sells and installs Window Well extensions

My window wells need to be higher on my house and I don't want to replace them. Does anyone install extensions that could be attached to the existing window wells?

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3 Answers


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Thanks so much!

Answered 6 years ago by KielH


Your best bet would probably be to contact or stop by a local Masonry Supply to see what is available and possibly get a referal for a contractor to install it. You could also possibly get a landscape contractor to build a well that is slightly biger than the existing one out of the different concrete wall sytems out there now.


Answered 6 years ago by ContractorDon


My recommendation - find a landscaper or window installer who does window wells, and have them look at it. My appraoch, assuming you only mean a few inches higher, would be one of the following:

1) buy a new matching well and cut into pieces to attach (with bolting and gasket, welding, or bitumastic and screws/rivets as applicable) to the top of the existing well as an extension. Just be sure any sharp edges are specified to be ground smooth.

2) dig down about 4 inches, and install a concrete lip or curb all around the well, to the height you need

3) raise a berm of clayey soil or soil-cement mixture just in front of and around the well to act as a levee for the few inches additional height you need

4) build a levee wall right in front to the height you need, using mortared-in block wall blocks or bricks or pavers (depending on height you need), making sure to bitumastic seal the window well/"levee" interface well before placing mortar. To avoid cracks that can leak, mortar should be reinforced with galvanized wire mesh or chicken wire.

5) using a piece of heavy, stiff pond liner material (Hypalon or HDPE or equal) bitumastic seal it to the face of the existing well for 6 inches or so below the top (using a couple of flexible metal or wood strips as a firring strip to attach with sheet metal screws through the well), leaving it sticking up as far as you need for adequate freeboard. Sort of like a giant doorsweep mounted upside down. Bitumastic seal to foundation same way, using metal firring strips and concrete anchors.

Answered 6 years ago by LCD

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