Time: 16 hours over two days.
Difficulty Rating: This project rates a 4 out of 5 on the Weekend Handyman difficulty scale.Materials:
For Removing Window and Frame --
Safety glasses
Ladder
Utility knife
Pry bar
Hammer
Safety goggles
Gloves
Reciprocating saw
For Framing Rough Opening --
Safety glasses
Ladder
Tape measure
2" x 4" pieces
Safety glasses
Impulse framing nailer
1" x 4" pieces
Miter saw
For Installing the New Window --
Safety glasses
Ladder
Utility knife
Pan flashing
Flashing tape
Self-adhesive sealing tape
House wrap
Caulk gun
100-percent silicone caulk
Minimal expanding foam insulation
Hammer stapler
1-1/2" galvanized roofing nails
Shims
Aluminum drip cap
For Installing the Window Insert --
Safety glasses
Ladder
Pry bar
Shims
2' and 4' levels
Tape measure
2-1/2" screws
Silicone
Insulating foam
1x material
Impulse nailer
Paint
Paintbrush
Installing the New WindowNote: Before the new window can be installed, the rough opening must be sealed properly.
- Seal the window by laying flexible flashing tape over the sill and extend it up the sides of the frame. Tuck the tape behind the siding, creating an impervious seal that will prevent water from seeping down under the window (figure A).
- Apply a layer of house wrap all the way around the opening and attach it with a hammer stapler. Overlap the opening and tuck it behind the siding.
- Apply a bead of silicone along the backsides of the flanges on the window (figure B). Do this on the top and sides but not the bottom. If water does get in it will be have room to escape. Use about half a tube per window.
- Place the window in the opening. Level the bottom first using shims. Lift the window up off the sill so you have room to get insulation in.
- Nail the flange in place using 1-1/2" galvanized roofing nails. Don't nail them tight just yet because you "may" still have to do some adjusting.
- Check the square by measuring corner to corner, and then nail the corners into place.
- Before doing the final nailing, put the window sashes back in (figure C).
- Shim the sides of the frame out, then finish nailing in the side flanges.
- Center the self-adhesive sealing tape over the flange.
- Shoot minimal expanding foam around the inside frame. (Be sure to look for the proper foam for sealing windows and frames.)
- Put the aluminum drip cap (figure D) around the outside of the window and cover with house wrap -- tucked under the siding. Seal it up with the sealing tape.
- Finish it off with exterior trim.
Twelve hours on the job and this new window has been installed. For a simple window-replacement solution, our host shows you how to install a window insert in the final segment.