Now that our new windows are installed, we plan to use a clear finish for
the interior pine, such as a satin water-based Urethane.
Is it best to use an exterior grade finish, or is an interior grade fine?
I think some rain will eventually wet the surfaces, since we'll probably
forget to close a window, or will be hit by a surprise rain storm.
To prevent staining the wood, the contractor said to first apply one coat of
finish before filling nail holes with a pine filler.
Any other advice is welcome, too.
It does help, thanks. I'll have lots of ventilation, the fumes would be bad.
So for the best, you would use exterior grade, and also an oil based
To clarify: Why not Urethane? and why oil, rather than water, based?
Not trying to be fussy. Would like to understand. :-)
With the high gloss finish urethane/polyurethane, after about two coats,
it'll look good - after three, like a polished piece of glass.
It will take many (6 or more from my own experience) to get a decent finish
with the water based stuff. The low odour and easy clean up is nice but it
tends to soak into the wood without doing much.
Agree with gord about the water vs oil.
And just want to add that the only usual difference between interior and
exterior finishes is perhaps a bit of extra UV protection, usually at about
double the price.
"Interior" will be fine, but if price is the same (or cheaper), use the
(it can't hurt)
My main concern is having a finish which will resist accidental rain water,
and also resist fading from sunlight. How long ago did you do the job?
Oh, and filling the nail holes too: did you use commercial filler, or make
your own filler?
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