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Default wood/glass transition



On 11/10/2010 12:17 PM, RicodJour wrote:
On Nov 10, 11:56 am, wrote:

For large thermal expansions, such as an outside door you would want
something that isn't cracked all the time. The glass needs to move against
the wood and they have different thermal coefficients. Use a flexible clear
caulking after you are done finishing.


Large thermal expansions? Where? It's a panel and frame door with "a
large glass panel". The thermal coefficient of expansion of glass is
5, wood is about half that @10-6 in/in per degree F. So what's that
add up to? In a 100F swing it's a couple or three thousandths. Not
exactly a large amount.

You are so wrong. You are talking strictly heat. The real culprit is
woods naturaul expansion and contraction. I had my bay windows blow the
seals because of the lack of enough growth area. Use a flexible caulk.
And yes the blue painters tape or frog tape are good to protect stains
and finishes.

Caulking? How? Where? The door is assembled - you want him to do
what, exactly? Force the caulk into a non-existent gap, or run it up
on the edge of the wood? Both poor choices.

Yes, just use lots of tape. You will have a hard time getting the urethane
off the frosted glass. You may want to cleanup with solvents before the
urethane gets too hardened (a day or two, at most)


Lots of tape...are you assuming he has some palsy or something? He
needs exactly one strip of tape running around the glass perimeter if
he's refinishing while it's laying flat. If he's doing it while it's
standing, then he'll mask off the all of the glass with plastic.

R