I have just finished sanding and staining the interior of an exterior
door. Should I use interior or exterior polyeurethane on it? I'd
prefer to use the interior variety because I happen to have it, but I'm
not sure if I should use that or the exterior version, presumably since
this is an exterior door and even the inside of the door will be
subject to more hot/cold swings than an interior door would. Other
than that I can't think of any compelling reason to use the exterior
variety.

wrote
I have just finished sanding and staining the interior of an exterior
door. Should I use interior or exterior polyeurethane on it? I'd
prefer to use the interior variety because I happen to have it, but I'm
not sure if I should use that or the exterior version, presumably since
this is an exterior door and even the inside of the door will be
subject to more hot/cold swings than an interior door would. Other
than that I can't think of any compelling reason to use the exterior
variety.

I have 5 doors that lead to the exterior and were protected with exterior
spar varnish (marine grade) on the exterior and interior poly on the
interior.
The finish was applied about ten years ago and is still in very good
condition. I have one exterior door on a storeroom that was finished with
the same latex trim paint as the house trim; applied less than a year ago. I
can tell it will not last.

Max
--
Want change? Vote out the incumbents.

wrote in message
ups.com...
I have just finished sanding and staining the interior of an exterior
door. Should I use interior or exterior polyeurethane on it? I'd
prefer to use the interior variety because I happen to have it, but I'm
not sure if I should use that or the exterior version, presumably since
this is an exterior door and even the inside of the door will be
subject to more hot/cold swings than an interior door would. Other
than that I can't think of any compelling reason to use the exterior
variety.


Interior for the inside, exterior for the outside. Temperature and moisture
are not as much of a concern as direct sunlight. Exterior finishes hold up
well with the absence of sun light. With sun light, exterior finishes
typically have to be reapplied every 2 to 4 years. The outer side of my
exterior door does not get direct sun light and the finish is 25 years old.

You can use any exterior paint/stain/varnish/poly inside. Not the
other way around, no interior outside. Some may argue but hey, I've
done this for over 25 years without any problems. Saves on material as
well.
john

You can use any exterior paint/stain/varnish/poly inside. Not the
other way around, no interior outside. Some may argue but hey, I've
done this for over 25 years without any problems. Saves on material as
well.
john

You can use any exterior paint/stain/varnish/poly inside. Not the
other way around, no interior outside. Some may argue but hey, I've
done this for over 25 years without any problems. Saves on material as
well.
john

jk wrote:
You can use any exterior paint/stain/varnish/poly inside. Not the
other way around, no interior outside. Some may argue but hey, I've
done this for over 25 years without any problems. Saves on material as
well.
john


some exterior finishing materials are not suitable for interior use.
toxic off-gassing is one issue, flexible curing films is another.

"jk" wrote in message
oups.com...

You can use any exterior paint/stain/varnish/poly inside. Not the
other way around, no interior outside. Some may argue but hey, I've
done this for over 25 years without any problems. Saves on material as
well.
john


Was that different from what I said. One exception to using an exterior on
the inside. If you use an exterior spar varnish it may always feel sticky.

wrote in message
ups.com...

jk wrote:
You can use any exterior paint/stain/varnish/poly inside. Not the
other way around, no interior outside. Some may argue but hey, I've
done this for over 25 years without any problems. Saves on material as
well.
john


some exterior finishing materials are not suitable for interior use.
toxic off-gassing is one issue, flexible curing films is another.


Could you repeat that 3 times... :~)

OK, I would agree that the VOC's in many exterior finishes are not
something that one would want in the house, particularly a closed
house. OTH, if its spring/summer/fall and nice outside and the windows
can be opened, I say paint away. I have used spar varnish, boat grade
oil finishes, high gloss paints, exterior primer on nasty bathroom
walls, on and on. All however were used with lots of ventilation,
fan(s), windows open, etc. If you can't ventilate don't use the stuff
in the house. Call me dumb if you'd like, that's OK.
john