I purchased my home a couple of years ago and this year I am going to replace the deck and build a fence. The deck was in terrible condition so I completely took it down. To my surprise I found 2 below grade windows under my deck that had been dry walled over on the inside. In fact the previous owner even left the glass panes in the windows. I want to fix this permanently and fill it in so it won't ever be a problem again. What is the best way to do this?
Jeff, you didn't say what material the windows were in. poured concrete foundation wall, framed wall?? Is there siding around the windows? A concrete wall could be filled with bricks and mortar. If it is a framed wall, build a framed box, shiething, then some flashing, lots of silicon caulk and match the siding. A picture would be a great help on this one.
In a similar situation, I cut a piece of flashing to the size of the window opening, then used metal screws to attach it to the (also metal) window frame. I then sealed around the opening and the screw heads using Lexel caulk.
I thought about filling in the opening with concrete afterwards but never bothered.
If you want something relatively quick and easy, you could fill it up with a 2-part Polyurethane Foam (info). It's really easy to apply, is airtight as long as you apply it properly and you're going to be covering it up anyway, right? A few months ago I had a home energy audit done on my house and the technician recommended this stuff to improve temperature retention and seal the house up. I've re-insulated a fair amount of my house with this stuff and it's great.