retrofit window

Old 06-24-07, 08:47 PM
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retrofit window

I am trying to install a vinyl sliding window in my partially finished shed. There are no windows frames in the shed, which has OSB up for sheating, but no siding. I know I will have to build a new frame and then cut the OSB, but my question is, do I cut the OSB to the size of the frame, and then nail the window to the OSB, or do I cut the OSB large enough to account for the nailing fin, then nail the window to the frame and re-install the OSB pieces? The second way seems like a lot more work. Once installed, I'm going to use flashing tape and housewrap, so it seems to me that it would be OK to nail it directly to the sheating, but I wanted to ask an expert or two. Also, when I create the frame, am I better to center it so I have to cut three studs, or use one stud as a side of the frame and only cut two studs?
Old 06-25-07, 03:58 AM
Join Date: Oct 2006
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Frame in for the window making the inside dimensions of the framing about 1/4-1/2" larger that the window frame. The nailing fin gets nailed to the sheathing. How you do the framing depends and where it goes in the wall. If location is not critical, you can use one stud as a side. Don't forget your flashing before the siding goes on.

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