How to Repair a BFS Window
- 1). Measure the length and width of your window opening and record the figures. Use these measurements to order your window from a local window specialist center or your favorite DIY center.
- 2). Use a putty knife to scrape the window buck area (opening) free of any debris and/or old caulking. Use a utility knife to cut away any caulking material that you can't remove with just the putty knife.
- 3). Lay the new window sash down on a workbench. Bend the metal flange that is around the window sash's outer edges by hand or lightly tap it with a hammer. This will allow for the new window sash to be nailed into the window's framing.
- 4). Lay a bead of caulking around the metal flange you just bent in. This will help seal the new BFS window into place against the frame.
- 5). Mount the window into the buck area. Use wood shims to level the window; make sure that the window is in place and plumb. Tap the wooden shims into place gently with a hammer to avoid splitting the wood shims.
- 6). Verify that you have installed the new BFS window sash evenly with a level as well as the window itself.
- 7). Hammer the metal flange to the window frame with nails spaced every 4 to 6 inches evenly.
- 8). Seal the edges of the new BFS window with a smooth, un-broken line or several beads of caulking. Use a stir stick to smooth the caulking out and a damp rag to clean up around the window's outer edges. Allow the caulk to dry 48 hours before using the window.