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Replacing Exterior Windows
If quick-fix repairs to your windows
aren't doing the job, it's time to consider putting in replacements.
If the frame on one of your exterior
windows is warped or severely weather damaged, replace it.
Even if the frames aren't warped or damaged, windows that
seem to constantly need repair or adjustment should be replaced.
A new, efficient window keeps cold drafts out of your manufactured
home and saves you energy dollars in the long run.
Before you buy a replacement for an
old window, think about the style and size of the new window
you'd like. Things to consider are the window's location,
whether you want a smaller or larger replacement, and the
way the original window was mounted on your home. Don't assume
that you must replace your old window with an exact duplicate.
Many new energy-efficient windows, in a variety of styles,
are made for manufactured homes.
Before you go shopping, determine the
size of your existing window and check if the window is flush-mounted
or mounted for lap siding. A flush-mounted window frame screws
on over the siding. If the window has a lap-siding mount,
the siding covers the window frame screws. Your new window
should have the same type of mount as your current window,
for appearance and ease of installation.
Before you order a new window, you may
want to remove your old window and check that the opening
is square. To do that, remove your window, and measure the
opening diagonals corner to corner or use a framing square
to measure the opening.
If the window opening is slightly off-square,
you can use shims to fit in a new window. If the opening is
significantly off-square, you can reduce the window opening
by roughing a new, square frame for a smaller window or you
can enlarge the opening for a larger window. It's usually
easier to reduce the opening and install a smaller window.
If you are replacing a bedroom window,
and it's the only exit from the bedroom to the outside, you
probably won't be able to make the opening smaller. Bedroom
windows that serve as egress windows in case of fire must
meet minimum code requirements.
 To
replace your window, you'll need screws, putty tape, silicone
sealant, and a screwdriver and/or replaceable drill with screwhead
bits. When you purchase your new window, check with the window
supplier about any special tools or screwhead bits you'll
need.
STEP 1: Remove siding
You can skip this step if your frame is mounted over vertical
siding. If your frame is mounted under lap siding, remove
the siding around the window. Be careful - if you bend aluminum
siding, you will not be able to get rid of the resulting crease.
 STEP
2: Remove window
Using a reversible drill and proper screwhead bit, remove
the screws around the edges of the frame. Note the size and
type of screw. It's best not to reuse these screws. Instead,
use new screws the same diameter and slightly longer than
the originals. Once all the screws are out, remove the old
window and frame.
 STEP
3: Apply putty
Scrape off all the old putty tape from the opening and frame.
Apply new putty tape around the window frame. For extra moisture
protection, apply two thicknesses of putty tape at the top
of the opening. Applying putty tape is very important, especially
if you have vertical siding. The tape fills any gaps between
the window frame and the siding.
STEP 4: Replace window
Start by inserting one screw in the middle of all four sides.
Be sure the screws go in straight. Do not tighten screws.
Check to make sure the window is square before inserting more
screws. After you have used about half the screws, open and
close the window a few times to see that it is square and
does not bind. Put in the remaining screws and tighten.
STEP 5: Seal
Run a bead of clear silicone sealant along the top of the
window where it meets the siding. Replace any siding that
was removed.
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