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Drywall
Finishing Tips
Realistically
considered, some level of skill is needed to finish out
drywall. Having
done work along similar lines is of benefit. Watching
experienced drywall finishers in action can give an accurate
concept
of what is needed. Mechanics that are certified normally
provide a worthy demonstration. As many do-it-yourselfer's
could
attest, after the fact.
Some of the tools you will need are drywall knives,
ladders or a form of scaffold, and a mixing tray. Some
of the needed materials are fiberglass or paper tape,
corner bead material and nails, plenty of water and a
sanding pole with paper to finalize the job.
Before beginning take a close look at the installed sheets
all around. Inspect to see if any cuts or tears
exist,
and if so they shoud be cut out
for removal and/or countersunk just below surface-level.
A drywall compound pre-mix is popular although
make sure it is to the right consistency. By adding
water and
stirring, to a smooth batter-like substance, take
care not to overthin.
Tip #1: While hot mud is in popular
use (also known as 15 or 20 minute quick or speed dry)
verify that the powder mix will have the
right
flexural properties for your application. If applying hot mud, tend toward a leaner application since you will find sanding a bit harder than for normal compound -- the main tradoff between them.
Tip #2:
a stir paddle on a 1/2" drill can cut down on much
of the grunt
work in stirring. But do not spin too rapidly. This can
beat air into the mix, turning later into air bubbles
dried in the form of many little concaves on your
wall.
Tip #3: while
many finshers now prefer lighweight compound even for bedding,
the manufacturer may recommend a drywall compound
that is
more suitable for bedding, and a seperate topping
compound. Whether this appeals to the marketing of a prodcut
or not, the topping is easier to sand, and makes for easier
cleanup.
You will then want to nail the outer corner beads in place
(if metal). Making sure they are adequately snug to the
wall surface to prevent lifting of the applied mud. See
how
to install drywall corner beads for more detail.
Next, ready your tape for applying -
either paper or fiberglass mesh tape.
If you have many boards to finish, a drywall banjo can
come in handy here and help automate the process. If
you have a smaller area for taping, handheld strips may
suffice. Choose
the right broad knife - 3" or 4" for
taping, and scaling wider for finishing.
(Older knives have a tendency to collect fine grain rust,
that is notably quick to bleed out onto the mud. A very
fine grain sandpaper can easily remove this with a gentle
buff
and
rinse)
Dampen
your mud trough with water, to later add for ease of cleanup,
before filling the tray with your compund mix.
Many finishers seperate out the finishing of corners
with flat surfaces. But don't worry, you will come
to realize which is the natural sequence most suited
for you. But most screwhead sinks should be done
all at once.
Next, you will want to apply the mud
onto the seams at a rate at least a several foot lead,
ahead of your
taping.
Feeding the tape onto the mudded seam by way of contact
with the flat knife edge alone and pressing with a firm
and continuous motion, stopping only for cleaning excess
from the edges as you
go, and
taking
no
new
debris
of
any form back
into the tray. It is recommended that the fist
layer with tape be dry before
applying the second coat. But the more experienced
you become, a second layer may be done in the same step
but
pay heed with this technique! Seasoned drywallers
at times dip their blades in water to maintain a moist
edge
that can go
toward a smooth layer.
The pre- taped inside corners must be cut with metal
snips. There can be no outward
burrs from cuts.
Lightly
sand to smooth. Float a top layer at least once. Each
application layer must exceed the underlying
widths applied. The topping
mixture last.
Lastly,
sand the ceiling and walls,
concentrating on areas of high visibility. If the ceilings
are to be stomped, they can normally pass with less sading.
But when sanding more vigorously with coarser papers
(80 grit or 100 grit sandpapers or screens)
be attentive and do
spot checks to prevent a roughening of the paper. Frayed
paper is accentuated by a paint finish, especially
those with any gloss.
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