USG SHEETROCK Gypsum Panels - Manual (Page 14)

10 Corners
a. Method 1—D
UR
-A-B
EAD
Corner
Reinforcement
Using D
UR
-A-B
EAD
Corner
Reinforcement, apply it to all
exterior corners of walls, soffits
and window returns. Hold bead
firmly against corner and nail
bead through small holes every
9
Љ on each flange. Make sure
that nails penetrate framing
members. Drive all nails below
nose of corner bead and tightly
into flange so that joint com-
pound will cover smoothly and
evenly. Be careful not to dent
the metal. Screw attachment is
not recommended.
Install USG Metal Trim where
gypsum panels butt windows or
concrete block. Nail trim every
9
Љ through small holes in flange.
Make sure that nails penetrate
framing members.
Tips
The easiest way to trim a corner
bead to the correct length is to
cut through the flanges with tin
snips one flange at a time, bend
and snap.
Force bead onto corner being
careful that the flanges don’t
spread beyond 90° angle,
making it hard to cover them
with joint compound.
b. Method 2—S
HEETROCK
Brand
Paper Faced Metal Bead and Trim
Measure length of corner and
cut trim to length with metal
snips. For vertical wall installa-
tions, cut the corner trim 1/2
Љ
(12.7 mm) shorter than the wall
height.
Using a 4
Љ taping knife, apply
ready-mixed S
HEETROCK
Brand
Joint Compound (Taping,
All-Purpose, or Lightweight
All-Purpose) or Setting-Type
S
HEETROCK
Brand Joint
Compound (D
URABOND
™ or E
ASY
S
AND
) to drywall slightly beyond
where the edge of the trim will
be. Helpful Hint: For this step,
application of the compound
often works best if the com-
pound is thinned slightly with
water. Add water in small incre-
ments (for one gallon of com-
pound, add water in 2 oz. incre-
ments) and mix with compound.
Attaching The Panels
14