Repair 1: Weather seal your garage door
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Photo 1: Remove the old garage door seal
Lift the garage door to about 6 ft. high and pull the old weather seal out through
the gap behind the door track.
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Photo 2: Clean the track
Scrape dirt and corrosion out of the garage door
weather seal track with a screwdriver
and a stiff brush.
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Photo 3: Install the new seal
Lubricate the rubber with a few drops of dish soap, then push and pull the new
garage door weather seal into the track.
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Photo 4: Fasten a new bottom seal to a wood garage door
Push the track into wet caulk and tight against the door
bottom. Clamp it into place. Then drill and screw the track to
the back of the door using 1-in. screws.
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Photo 5: Apply weather stripping between door sections
Cut the weather stripping into strips the width of the door.
Then fold along the crease so the “V” faces the outside.
Insert the strip between the door sections, remove the
adhesive backing and press it into place.
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Photo 6: Glue down a new threshold
Squirt out a bead of threshold adhesive according to
label directions. Then move the threshold into place and align
it with the chalk line you made earlier. Close the garage door
and let the weight hold it in position until the adhesive sets
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Photo 7: Nail on self-sealing door stop
Slide the door stop against the garage door so the vinyl
seal bends at about a 45-degree angle. Then nail the stop
into place with galvanized (or aluminum) 1-1/2-in. nails.
If you want to keep the heat in your
garage this winter or retain the cooled air
next summer, you’ll have to do more
than just install an insulated door. Most
of the conditioned air escapes around
and through all the cracks. Here are four
simple ways to seal your garage door as much
as possible. You can do the whole job in
an afternoon for as little as $100, depending
on the size of the door.
Measure the garage door for the seal
Start by measuring the width, height and
thickness of your garage door. You’ll need
those measurements to buy garage door stop
with a built-in sealing lip and a new
bottom seal. While you’re at the home
center, buy V-strip weather stripping, a
tube of exterior caulk and a small can of
wood sealer (if you have a wooden door).
And for extra sealing power, buy a rubber
threshold (one choice is the Storm Shield
Garage Door Threshold; about $53 for 10 ft. 6 in.
Some garage doors come with a metal
track that holds a replaceable rubber
seal. Over time, the seal flattens and
cracks. If that’s what you have, replace it
with a “cold weather” silicone-type seal,
which remains flexible in cold weather
and lasts longer. If your home center
doesn’t stock them, you can find one
online; see one source above. Lubricate
the silicone seal with dishwashing detergent
and slide it into the track slots.
Remove the old garage door seal
Lift the door just enough that the garage
door track doesn’t get in the way of the
weather seal, then slide out the old rubber
bulb (Photo 1). You may need to pry the
track ends open with a flat screwdriver if
they’ve been crimped. If it’s especially stubborn,
cut it and remove it in pieces.
Clean the door bottom (Photo 2), then
cut the new rubber seal to length with a
razor knife. Thread the T-shaped edges into
the weather seal track, then slide the seal
across the door. Be patient—it takes a lot of
pushing and pulling even with a helper.
If you have a wooden garage door, rip off
the nailed rubber seal. Then seal the
wood with wood sealer. While the sealer
dries, prepare the new aluminum track
by cutting it to length and notching the
ends so it fits around the bottom roller.
Next, lay down a thick bead of caulk
along the leading edge of the door and
attach the track setup (Photo 4).
Prepare the areas between the door
sections by cleaning them with a rag and
household cleaner (be careful not to
pinch any fingers). Then install the pressure-sensitive V-strip weather stripping
(Photo 5). Repeat for each section.
Install the threshold
Now move on to the threshold. Start by
cleaning the concrete with degreaser and
water. Rinse and let dry. Then roll the
threshold into place with the hump on
the inside of the garage door and cut to
the width of the opening. Gently close
the door onto the threshold and square
up the hump to meet the door seal. Mark
the edge of the threshold on the floor at
each end and snap a chalk line along
your marks. Next, glue the threshold into
place. Close the door firmly against the
threshold and leave it closed until the
adhesive dries (Photo 6).
Install the stop
Pry off the old door stop and install new door stop that has a sealing lip (Photo 7).
Slide a section of retainer and gasket onto the bottom
edge of the garage door. Tilt it until the rubber gasket
touches the concrete floor. Then screw the
retainer in place.
Seal a garage door gap, Part 2
Here's how to deal with gaps caused by an uneven bottom door panel or sunken concrete.
The easiest, but least elegant, method is to install several pieces of bottom seal retainer and rubber gasket in the gap areas. Just measure the thickness of your bottom panel and buy sections of seal retainer and gasket from a garage parts supplier (garagedoorpartsusa.com is one online source). Mount the retainer to the bottom panel wherever there's a gap. Finish the job by sealing the top edge of the retainer with caulk and then paint to match the door. This fix works on wood and metal doors.
If you have a wood door and want a cleaner look, remove the existing bottom seal and scribe/cut the bottom panel to match the contour of the concrete floor. Seal the freshly cut wood with wood sealer. Then remount the bottom seal.
Repair 2: Replace rotting trim
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Photo 1: Remove the old trim
Cut through any caulk lines with a
utility knife, then pry off the old
garage doorstop, brick mold and jamb.
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Photo 2: Install the new jamb
Use a clamp to hold up one end of the top jamb, then nail the jamb to the
framing with 8d galvanized casing nails.
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Photo 3: Glue and nail brick mold
Spread PVC cement on both sides of
the mitered corners, then hold them
together until they bond.
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Photo 4: Add stop molding
Mark the width of the trim piece at
several points on the jamb, then
nail. Trim the overlapping rubber seal at
Wood garage doorjambs and trim often
rot near the bottom or get crunched by
A good, long-lasting solution is to
replace the wood jamb, brick mold trim
and doorstop with paintable solid vinyl
pieces that won’t crack or decay. Available
at home centers and lumberyards, the
three pieces cost a total of about $4 per
ft.—comparable to clear wood. The vinyl
can be cut, nailed and painted just like
wood. It’s available in white, but you can
order brown, bronze and tan. Fill nail
holes with white caulk or exterior wood
filler, then if desired prime and paint with
acrylic latex. Use a light paint color over
white vinyl to keep it from overheating.
Remove the old jamb and trim (Photo
1), then nail the vinyl jamb to the frame,
beginning with the top piece (Photo 2).
Fasten every 12 to 16 in. with 8d galvanized
nails or stainless steel trim screws.
Precut the miters on the top piece of brick
mold trim and nail it to the framing every
12 in. with 10d galvanized casing nails. Use
6d casing nails for the stop molding, nailing
it at the premarked points on the trim.
If the temperature is below 40 degrees
F during installation, predrill nail holes
and leave a 1/8-in. gap at the ends of the
jamb for expansion.
Glue the brick mold corners with PVC
cement (Photo 3), then nail them into
place after the glue sets. To avoid breaking
the joint, wait at least an hour for the glue
to fully cure before nailing within a foot of
the corner. Splice long runs with glued
The edge of the vinyl stop molding
should be 2-1/2 in. back from the garage
door so the rubber seal fits loosely against
the door (Photo 4).
Repair 3: Clean up a rusty door track
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Photo 1: Trim the rusty end
Mark the bottom of the track, then cut the metal with a reciprocating saw
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Photo 2: Clean and paint
Clean the bottom of the track with mineral spirits, wire-brush the rust,
and then paint the area.
Garage door tracks often rest directly
on damp concrete floors, where they
eventually rust. However, there's no
reason they can't be slightly above the
floor and stay dry: The garage rafters
carry the weight of the track and the
angle brackets hold the track in place.
Clean up the tracks and prevent
rusting by simply cutting off the bottom
1/2 in. First make sure all the
angle bracket bolts are tight, then cut
the track bottoms off (Photo 1). Use a
rag dipped in thinner to remove any
lubricant on the first 6 in. of track,
then scrape and brush off as much
rust as you can. Finally, paint the bottom
with a metal spray paint that's
formulated to bond to rusted areas
(Photo 2). Rust-Oleum Rust Reformer
is one choice.