Repairing Old Wood Windows
Part 2: Glazing and Painting
to: Part 1: Repairing
and Removing Glazing and Paint »
There are different types of glazing
can be used to glaze windows. I am using Sarco Seal putty as it glazes over much faster than Dap33 and is recommended by professionals. Glazing video
Average time to glaze
a six pane window is about one and one half hours.
Dap 33 is easily found but takes about four
or more weeks before it has a skin tough enough to be
painted. It is also not recommended by professionals. Sarco
Seal Dual Glaze or Sarco Mutiglaze Type M) is the putty
of choice for many sash
makers and window restorers. It can now be purchased in
small quantities from
Smith Restoration Sash.
I have been told that glazing putty shouldn't be kept for
more than two years.
Expect that the glaze can take up to two weeks before
it can be primed and painted. The reason being is that
glazing hardens through oxidation, a slow process. More
about glazing hardening
the epoxy consolidant (see previous
dried for a least two days, it is time to reset the glass.
Be sure to clean each glass pane with a glass cleaner before
Apply a thin bead of putty to the frame.
One method is to roll out a thin bead and place it on the
frame. Make sure the bead is large enough so that the glaze
squeezes out for a good seal.
If the glazing is cold, you can
heat the glazing putty for about 20 seconds with a heat
gun on low. Then press the glass
into it. The idea is to seal the glass against the front
of the frame. You should see the putty squeeze between
the glass and the frame. Some will squeeze out of the back
and can be cleaned up later.
Once the glass is tight against the glaze, insert the
points. We had to cut down some of the points we bought
as they stuck out too high and pushed through the
panes up to 12" can
use 1 or 2 points per side, evenly spaced, adding 1 point
for every 6 -8 inches. To insert the points,
put one against the glass with the point down into the
wood. Use your putty knife to wiggle-push the point down
until it is seated at a height below the final height
of the putty.
Trim the putty off the frame that has squeezed out the
Click to enlarge
Roll a small bead for the pane's
Clipping a glazing point so it
will fit the old window
Be sure to use a small putty knife made for glazing, and
make sure it is always clean.
Remove a golf ball sized piece and warm it by rolling
it in your hands. Then, press it into the frame against
the glass, so that the groove is overfilled. Neatness doesn't
count here. Once you have done all four sides, pick up
your putty knife and, starting in any corner, glide the
knife over the putty, pressing it firmly into the frame
and cutting off the excess putty at the same time. Move
slowly, with the knife at a deep angle to the frame. Use
your fingers for smoothing.
Click to enlarge
Place rolled glazing around the
Press the glazing in with your
The glazing removed with a putty
The final job.
The glazing must set a skin for at least 7 -14 days before
you can prime and paint. The glass should be cleaned so
that all of the putty oils are removed. It is important
that in painting the glazing, the paint flows onto a small
part of the glass to make a weather tight seal.
Painting the window
From the alt.home.repair web site
It takes a LOT longer for the DAP 33
to skin over enough to prime
and paint. If you call DAP about it, they'll tell you that
it takes a
minimum of two weeks for it to skin over enough. My personal
experience is that 2 weeks *outdoors* will form an adequate
glazed some new windows around Christmas time (the sashes
are in my
basement), and 3 months later they still hadn't skinned
When I primed/painted one of them, the paint developed
cracks a day
later. What I normally do is to prime/paint everything
glazing, rehang the sashes, then wait a few weeks for them
to skin over
and then prime/paint the glazing with an artist's brush.
Click to enlarge
The final product
If you used the epoxy consolidant to coat your window,
sand it to remove the gloss, and then paint with a good
acrylic. A primer is not needed.
Since the primer and paint need to overlap the glass for
a good seal, one method is to paint as close as possible on
the glass and immediately wipe with a paper towel.
Use a good small brush to paint the glazing. I fond
that the $10 brush was worht the cost.
Wiping primer off window
After painting, add bronze weatherstripping. Be sure
to use brass nails. This stripping will hold up well for
hundreds of years.
Cut bronze strips to just fit the sides of the window frame
and the bottom of the window. The stripping should be
positioned so the flange faces the outside of the widow
(the fasteners are on the inside of the frame and widow
Using either brass nails, stainless
steel nails, or stainless steel staples, put a fastener
1/3 away from each edge to align the weatherstrip. Then
fasten with a nail or stable every two inches. You may
need to punch nail holes with an awl if the strip does
not come with pre punched holes.
Don't set the nails with the hammer.
Drive nails in with a nail set. When the strip in fastened,
run a putty knife or paint scraper down the strip's score
line to push out the strip edge.
Weather stripping is available from Kilian
Hardware or the HardwareHut.
You may have to buy the brass nails (brads) separately if
the nails shipped with the weatherstripping are brass plated steel
which will rust. You can also attach the
weather stripping with stainless steel staples.
|Click to enlarge
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1: Repairing and Removing Glazing and Paint »
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