How to Guide

20 21
FINISHING THE PANELS
17 SECOND COAT,
OUTSIDE CORNERS
AND METAL TRIM
Allow fi rst coat to dry
overnight (drying time
may vary, depending on
temperature, humidity and
jobsite conditions). Apply
second coat with 8" knife,
feathering slightly beyond
fi r s t c o a t .
18 THIRD COAT,
FLAT JOINTS AND
FASTENERS
Allow second coat to dry
overnight (drying time
may vary, depending on
temperature, humidity
and jobsite conditions).
If necessary, remove
imperfections with knife
or sandpaper. Apply a thin
fi nishing coat with a 10"
knife to the fl at joints and
a 5" knife to the fastener
heads. Press knife fi rmly
so joint compound fi lls
depressions but does
not signifi cantly add to
thickness. Feather edges at
least 2" beyond second coat.
TIPS
Do not sand unless it is
necessary. If you do sand,
use fi ne-grit sandpaper
and be careful not to scu
the gypsum panel paper to
minimize surface touch-up
requirements. Use dust
collection with HEPA fi lter
with power sanding. Wear a
dust mask if excessive dust
is produced and the area
cannot be ventilated.
Before applying the fi nal
coat,
check to see if tapered
joints are level with surface.
Hold the 10" blade across
the joint, straight out from
the wall. If the blade can
be rocked across the joint,
the joint is crowned. It must
be hidden by feathering
the fi nal coat out as far as
possible.
When applying earlier coats,
minor depressions and
grooves were not a problem.
However, do not leave any
during the application of this
fi nal coat or they will mar
the fi nished surface.
19 THIRD COAT, OUTSIDE
CORNERS AND METAL
TRIM
Allow second coat to dry
overnight (drying time
may vary, depending on
temperature, humidity and
jobsite conditions). Sand
lightly if necessary. Apply
third coat with 10" knife,
feathering slightly beyond
second coat. A third coat
is typically not required if
USG Sheetrock® Brand Plus
3® Lightweight All Purpose
Joint Compound is used.
20 SANDING
Allow third coat to dry
overnight (drying time
may vary, depending on
temperature, humidity
and jobsite conditions).
Lightly sand imperfections
in fi nished joints, corners
and over fastener heads.
Carefully remove sanding
dust with damp sponge.
Use a dust collection with
a HEPA fi lter with power
sanding. Wear a dust mask
if excessive dust is produced
and the area cannot be
ventilated.
TIP
Use a fi ne-grit sandpaper
wrapped around a block of
wood so you don’t dig into
the joint compound. Avoid
roughening the surface
paper when sanding. If you
do roughen it by
accident,
repair the damage by
applying a little joint
compound with a 5" knife.
PANEL 49
PANEL 51
PANEL 12 PGS 20 &.21
PANEL 13 PG. 21
PANEL 52
PANEL 12 PGS 20 &.21
PANEL 13 PG. 21
PANEL 50
PANEL 54
PANEL 53