Window Replacement

Help Around the House : Episode ARH-151 -- More Projects »
Home repair expert Henry Harrison helps a homeowner with the difficult task of putting in a new window. On his elbow grease scale of one to four, Harrison gives this task a full-scale four.

Tools:

measuring tape
pencil
chalk line
circular saw
chisel
hammer
pry bars
utility knife
combination square
putty knife
power drill
level
metal straightedge
miter box
hacksaw
nail set
caulking gun
safety glasses
replacement window and assorted materials

PHOTO

Figure A
PHOTO

Figure B
PHOTO

Figure C
Steps:

1. Mark a border two inches out from the existing window by marking points with a pencil, then connecting the dots using the straightedge and chalk line (figure A).

2. Set the circular saw so the blade cuts just through the siding boards without cutting into the frame of the house and cut along the border (figure B). Be sure to wear safety glasses when using power tools.

3. Cut through the caulk seam around the window with a utility knife, then use the chisels and pry bars to remove sections of siding (figure C).

PHOTO

Figure D
PHOTO

Figure E
4. Remove the nails holding the window in place using a pry bar and hammer (figure D). Have an assistant help you remove the window from the frame (figure E).
PHOTO

Figure F
PHOTO

Figure G
5. Check the new window's fit and cut any excess drywall to allow a good fit. Apply a moisture barrier around the frame to protect the wood (figure F).

6. Position the new window and check that it is level and plumb. Once it's in place drill pilot holes for the attachment screws (figure G).

PHOTO

Figure H
PHOTO

Figure I
7. Drive all the screws and take measurements for your trim. Cut trim pieces to the right size using the hacksaw and miter box. Drill pilot holes (figure H) and attach the trim with nails. Use a nail set to sink the nails below the surface.

8. Apply a bead of caulk around the outside of the trim (figure I).