Creating Energy Efficient Windows
This DIY Basic will provide tips on creating energy efficient windows.
Measure your existing window to determine what size window to order. First, measure the width of the inside of your window jamb at the top, middle and bottom (Image 1); then measure the height at the center and the right and left sides (Image 2). Take the smallest reading in each set and use those numbers when ordering your windows. Most suppliers will order to the closest 1/8", so give exact measurements when ordering. It's better to err on the small side than on the large side when ordering windows.
Once your storm window has arrived, test-fit it to make sure it's the right size (Image 3). It's also a good idea to wash the regular window before installing the storm window.
Apply a thin bead of caulk to the outer edges of the window stop at the top and sides (Image 1), distributing the caulk as evenly as possible. Do not caulk the bottom of the storm window -- you'll need to allow room for rain and moisture to run off the sill (Image 2).
Insert the window into the opening and be sure to center the window between the side stops. It's best to set the window tight against the sill so that the window has ample support.
Most windows are predrilled; if this is not the case, drill holes 12" apart and centered over the window stops. Then, starting at the top, fasten the window using #4 (1") sheet-metal screws along each side of the window.
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