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Exterior Painting Tips
Exterior Primer
New Wood:
-
Should first be coated with a suitable primer before the finish
paint is applied.
-
Oil\Alkyd resins will penetrate into the wood surface better than
the fast drying latex.
- Latex
paint will mix with water, some moisture content in the wood will
not resist the latex primer.
-
Another property of latex is that allows moisture to penetrate (Breaths)
much more so than oil .
-
Another benefit of latex is its flexibility, as the siding
will expand and contract with temperature and
humidity changes.
- Oil
based primer for wood siding also makes a good metal primer that
will seal nail heads protecting
them
from rust.
-
Oil-based /Alkyd does not raise wood grain.
- We do
not recommend using a latex primer to be coated with an oil finish.
- An
oil/alkyd primer under latex finish paint is a good method.
-
Whatever type of primer you chose, check the manufacturers label to
be sure it is suitable for the
materials you will be using it on.
Previously Painted Wood:
-
Previously painted wood will not need to be primed, however spot
priming all bare wood and rusted
nail
heads is important.
- If
you will be using oil finish paint, then you should use oil based
primer.
- If
there are a lot of rusted nail heads showing through, you may choose
to use the oil primer as it will
usually seal metal better than latex.
Finish Paint
Wood Trim ,Wood Siding:
-
Latex is the more practical choice.
-
Houses previously painted with oil based house paint may have
developed a chalky surface.
- Latex
paint would not develop as good a bond to the surface as the oil
based paint.
- Chalking paint was a way of having a self cleaning building.
Exterior Doors:
- Oil
/Alkyd is often the better choice for this is because often the
latex paint, even completely dry will form
a
bond to certain rubber-like
materials in which the doors weather stripping is made of. This will
lead to pealing paint wherever the
weather strip contacts the door.
Window sash:
- Easier to paint with oil, than with latex. If widows are being
re-glazed with oil based glazing
compound (Window Putty), they will need to
be painted or at least primed with oil paint.
Vinyl Siding:
- Latex
is generally preferred for vinyl siding. With a good quality latex
paint, no primer will be necessary,
but
a latex bonding primer is a good
idea on glossy siding.
- Individual siding manufacturers often have there own painting
recommendations. Some
manufacturers recommend not to paint it.
Aluminum Siding:
- Latex finish paint gives nice long lasting results no primer is
usually required.
- Bare spots can be spot primed prior to painting with the finish
paint.
Window sash:
- Is often easier to paint w/oil/alkyd, than with latex. If widows
are being re-glazed with oil based
glazing compound (Window Putty), they will need to be
painted or at least primed with oil paint.
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Call Toll Free!
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1-888-524-3464 |
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1-888-5-BIDING |
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