USG Manufactured Housing Handbook User Manual

Page 12

Tips
For best result apply medium
pressure and hold knife at a 45°
angle to panel.

To apply joint compound neatly,
dip the knife and strike excess
compound from the sides of the
knife to keep the material cen-
tered.

Keep the blade clean, especially
of dried bits of compound, to
avoid leaving scratches in the wet
joint compound as you draw the
knife over it. Discard any com-
pound containing dried bits of
material. Clean blade by drawing
it over edge of pan.

While embedding tape, draw the
knife slowly along the length of
the tape to provide an even distri-
bution of joint compound. If addi-
tional coats of compound will be
applied, small scratches and
streaks need not be smoothed
out. Do not crown the joints.

Setting compounds (except for
T

-S

Lite and E

ASY

AND

) are

extremely hard after curing and
cannot be sanded.

13 First Coat, Inside Corners

Using Fiberglass Tape

Fold the tape in half lengthwise
and push the tape into the corner;
unfold against the drywall and
press in place using an inside-
corner trowel. Apply compound
with a joint knife using sufficient
pressure to force the compound
through the tape into firm contact
with the board.

CAUTION: It is difficult to fold
fiberglass tape to achieve a
straight interior corner. In addi-
tion, the use of fiberglass tape
can cause a buildup of compound
in the corner that will result in
cracking later on. Therefore, the
use of paper tape in corners is
recommended. As an alternative,
paper-faced metal bead can also
be used for corner reinforcement.

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Using Paper Tape

Use a 6

Љ joint finishing knife to

apply a thin layer of S

HEETROCK

Brand Setting-Type Joint Com-
pound on both sides of corner.
Extend compound slightly beyond
area to be covered by tape.

Fold tape along center crease and
lightly press into position with
your fingers.

Tightly embed tape as with other
joints.

Tip
When you are finishing an inside
corner with tape, it is helpful to
identify the closed and open sides
of the corner, and to treat them
differently. At an inside corner, the
edge of one board butts up
against the face of the other
board, leaving a narrow opening.
When you run your taping knife
down the butted board, the blade
can be aligned firmly against the
face of the other panel. That

makes this closed side easier to
finish. On the open side, in con-
trast, your knife will tend to slip
into the crack between the two
boards. This means that there is a
danger of cutting through the
tape and compound on the open
side during finishing. For this rea-
son, it helps to follow a special
sequence of steps for finishing
the two sides of an inside corner.

Once you have applied the tape to
an inside corner and embedded it
firmly, go back and apply a coat of
compound only over the closed
side of the joint. Remember that
you are using a nonsandable
compound, so that it is important
to finish the closed side of the
corner as smoothly as possible.
(Applying a coat of compound to
the closed side at this point gives
it time to set before you return to
work on the open side. This will
help prevent the marring of tape
and compound that can occur at
the gap between the two boards.)

14 First Coat, Fasteners

For each fastener depression,
apply S

HEETROCK

MH Brand

Setting-Type Joint Compound
with 6

Љ knife. Holding the blade

almost flush with the panel, draw
the joint compound across a fas-
tener head and the dimple sur-
rounding it.

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