I replaced a chunk of siding on my house and now I need to prime and paint
Question in my mind is, should I go with a latex or oil primer? I only ask
because while I KNOW the paint on my house now is latex, when I get the
siding painted again I'm not sure if at that point I should go with an oil
or latex paint.
I have heard that oil paints are increasingly not used anymore. So I'm
wondering if I go with latex now, am I stuck using latex in the future or if
I go with an oil now, will I have to reprime with latex later.
I'm just wondering what would be the best route to go given that 1) the
current paint job is bad quality 2) I will repaint the house in the future.
Also, when painting cedar trim INSIDE the house (window trim and the like)
and you want to keep the natural cedar color - would a normal polyeurethane
coat do the job or is there something specific to cedar?
Oil paint is getting more difficult to find because of government
restrictions for air quality. Some regions are not allowed to sell oil
based paint because of hte VOC content. You may as well get used to using
ABSOLUTELY!! We should all do our part and stop using oil paint.
That way, we'll be able to have more cars :)
We should also stop putting in lawns...watering them reduces the
number of golf courses (or is it vice versa, I forget). We could also
flush just once a day.
Any way we can pass a law against congress?
Note: above comments not directed toward any poster, just the idjits
in DC, state capitols, cities and towns.
Latex dominates the marketplace and is fine for most siturations
including yours. Oils can still be found at a real paint store and
are still good for problem surfaces or surfaces that are expected to
get wet like bathrooms.
You say that you are replacing the siding. This suggest a problem
with water damage? This would be the type of situation where an oil
might be used. Ultimately it's your call. I rountinely use an oil
primer on a surface that is expected to get wet.
No, you will not be stuck. It is good practice and quite common to
put latex over an oil primer. It is considered not so good to do the
reverse. Before anyone disagrees, of course it can be done just not
It is unusual to use cedar inside the house but Poly is OK. There is
no finish specific to cedar. A penetrating stain is often used on
cedar in an outdoor situation but I haven't seen it used indoors.
Latex paint over oil-based primer has been standard practice in house
painting. The only thing about it is that you have to paint over the
primer within about 24 hours of application, because if it dries too
much before the paint is applied, it won't adhere properly. But I'd
make a quick phone call to a paint shop (not HD or Lowe's) to verify
anything you read here.
It looks like you are asking me.
1. I don't know that they do have different expansions rates but
maybe you do? My claims are based upon experience with paint not with
the chemistry or physics of paint. I leave such matters to the the
paint manufacturers. Any paint will fail "eventually" regardless of
the particulars. That's the downside of all paint.
2. The siding itself is not supposed to breath although accomodation
is often made for ventilation beneath the siding with weep holes and
such. It is suppose to be an impenetrable barrier against the
moisture, ideally excluding it entirely.
Alright, thank for the tip and thanks to the rest of the responders.
Actually all my window trim is done in cedar, it contrasts nicely with my
interior paint, but my cat drools on it and so I get these water stains
where he sits and plots his schemes against the birds.
Depends on what wood the siding is made from.
If you have cedar or redwood, you need to use an oil primer to seal the wood.
Otherwise, you'll have red-brown stains bleeding through the primer, and
eventually through the topcoat as well.
Anything else, you can take your choice of latex or oil; I'd recommend latex
due to easy cleanup, lower price, easy cleanup, faster drying, easy cleanup,
better for the environment, and easy cleanup.
The topcoat can, and probably should, be latex regardless of which type of
primer you use.
Doug Miller (alphageek at milmac dot com)
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