Conflctinng Advice on Painting House
Sam
I have an older home Boston area wood shingles and wood trim. Multiple
layers
of oil paint. Trim peeling badly. Shingles on the south side peeling.
Not too bad on ther
other sides.
I am getting conflicting advice from painters and paint stores.
Painter #1 recommends:
Prime ENTIRE house oil based primer
Shingles oil or latex topcoat (my choice)
Trim oil topcoat (NEVER latex)
Painter #2
Spot prime shingles and trim oil based primer
Oil Topcoat
Paint Store reccomends
Spot prime shingles and trim oil based primer
acryllic latex topcoat (says latex topcoats are now better than
oil)
What's the story ? Is the paint store correct ? Can I put the acrylic
latex
topcoat on the shingles and trim with only spot priming the bare spots,
even though there are multiple layers of oil paint ??
Timothy Lasby
Go with tha acrylic. It won't dry and crack like oil.
PBroussard
While they claim it can be done, I would prefer to prime the whole house with a
quality long oil primer after extensive prepping. This will provide a good base
for many years for subsequent topcoats of latex. It will, as Jim noted, give
you two coats instead of one, and will last longer. Once primed, latex will not
need priming in the future, except in spots where the old alkyd finish cracks
and peels. Once again, prep work is essential to a quality paint job. Go with
painter 1, although I wouldn't hesitate to use an acyrlic on trim, unless
there's heavy use, kids, etc.
Paul Broussard, Broussard Painting Contractors
pres., chief bottlewasher, Baton Rouge Dart Assn.
"Careful. We don't want to learn from this." -- Calvin
Sam
OK I guess I can believe that acryllic latex would be ok on top of the oil primer.
However if one is going to just SPOT prime, then are you better off with
an acryllic latex topcoat or an oil topcoat , keeping in mind that there are
multiple layers of oil pant on the house ????
dick_...@juno.com
In article <3557648B...@no.junk.mail>,
Sam <s...@no.junk.mail> wrote:
>
> I have an older home Boston area wood shingles and wood trim. Multiple
> layers of oil paint. Trim peeling badly. Shingles on the south side
>
> I am getting conflicting advice from painters and paint stores.
>
> Painter #1 recommends:
> Prime ENTIRE house oil based primer
> Shingles oil or latex topcoat (my choice)
> Trim oil topcoat (NEVER latex)
>
> Painter #2
> Spot prime shingles and trim oil based primer
> Oil Topcoat
>
> Paint Store reccomends
> Spot prime shingles and trim oil based primer
Latex works fine over oil, but oil over latex, whether it's primer or top
coat, is bad because the oil forms a vapor barrier while the latex doesn't,
leading to water getting trapped under the oil and the oil peeling off.
All oil paint sticks well to chaulked old paint, but not all latex paints do.
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PBroussard
>Latex works fine over oil, but oil over latex, whether it's primer or top
>coat, is bad because the oil forms a vapor barrier while the latex doesn't,
>leading to water getting trapped under the oil and the oil peeling off.
>All oil paint sticks well to chaulked old paint, but not all latex paints do.
I beg to differ, latex does NOT work fine over oil. It will not adhere nearly
as well as an alkyd primer. Sorry, but for a coating to last any length of time
and hold up to a guarantee that a good contractor will provide, it should pass
the "scratch test". Apply your coating, allow it to cure, then TRY to scratch
it off with a fingernail. Latex will scratch right off an old alkyd finish. It
does however work very well over an alkyd primer.
John Alonzo Breen
In article <199805131331...@ladder03.news.aol.com>,
PBroussard <pbrou...@aol.com> wrote:
>I beg to differ, latex does NOT work fine over oil. It will not adhere nearly
>as well as an alkyd primer.
This is interesting. As near as I can tell, my house (35+ years old)
has oil primer, one layer of green oil, one layer of green oil or
latex (can't tell), one layer of blue latex, and one layer of beige
latex (which I put on 12 years ago, plus spot touch-ups over the
years). I've noticed places where it appears that the paint separated
between the two green layers. Could it be that there's only one layer
of green, and the blue latex is peeling off with some of the green oil
coming with it, giving the appearance of two green layers?
As a sidenote, the biggest problem I've had is places where the primer
appears to be failing: it peels right down to the wood, and the only
sign of primer is a white chalk. The places where the primer is still
holding is doing very well though, making scraping very difficult.
--
John A. Breen | I teleported home one night with Ron & Sid & Meg.
ja...@cec.wustl.edu | Ron stole Meggie's heart away, and I got Sidney's leg.
| - Douglas Adams