Wood
Siding
and Trim/Painted/Flaking or Peeling/To Be Painted
a.
Surface Preparation:
NOTE‚
If lead is suspected in the paint, do not attempt to scrape, sand,
power wash, use heat gun, etc., which might put lead into the environment,
but rather contact a contractor qualified for lead assessment and
abatement
- remove all
loose or poorly adhering paint by scraping, or by careful hand
wire brushing using a stiff metal wire brush going with the grain
of the wood; wear eye protection, work gloves and a dust mask
- for wood
shakes, use hand wire brushing with vertical strokes; note that
with a steel wire brush on cedar, all bits of steel wire must
be removed or discoloration can result
- feather sand
rough edges of remaining paint; refresh surface of exposed, weathered
wood by sanding with medium grit (#120) garnet paper; if gloss
or semigloss paint will be used, follow by sanding with fine grit
(#220) garnet paper; wear eye protection, work gloves and a dust
mask
- dull any
glossy paint by sanding with fine (#220) grit garnet paper; wear
eye protection, dust mask and work gloves
- treat any
mildew with a 3:1 water:household bleach mixture, leaving it on
for 20 minutes and adding more as it dries; wear eye and skin
protection; rinse thoroughly
- remove dirt,
chalk, dust, residual particles of paint, treated mildew, etc.
by scrubbing with detergent and water, rinse thoroughly
b. Priming:
- prime areas
where old paint has come off
- for best
results, prime entire job
- use quality
exterior stain blocking latex or oil-based wood primer
- do not leave
a primer unpainted
c. Painting:
- use top-of-the-line
exterior 100% acrylic latex house paint in flat, satin, semigloss
or gloss finish, depending on appearance desired
- a flat finish
will provide a more uniform appearance; quality satin and semigloss
finishes will resist mildew more than a flat
- use quality
oil-based primer and paint if surface has build-up of old oil-based
paint
- do not apply
oil-based paint over latex paint
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