Use and Care Guide

16
Conditions
JOINT PROBLEMS
Tape Photographing
S
tarved Joint
High Joint
Beading/Ridging
NAIL PROBLEMS
Nail Pops
Depressed Nails
Probable Cause
Slow drying of finishing coats. Too
much compound under tape. Joint
compound too thin.
Compound applied too thin in
viscosity and thickness. Too little
compound over joint. Excessive
sanding.
Excess joint compound under the
tape. Excess joint compound over
the tape and improper feathering.
Poor framing. Improper wallboard
application. Improper sanding. Use
of compound too heavy.
Lumber expansion and contraction.
Improper heating and ventilation.
Cold weather with high humidity.
Improper application of wallboard.
Excess compound over joints and
needless wide joints. Rough or
poorly cut butt joint.
Framing out of alignment. Lumber
shrinkage. Improper wallboard
application. Improper heating and
ventilation.
Framing out of alignment.
Lumber expansion due to moisture
absorption. Improper wallboard
application. Too few nails, improper
furring, structural movement.
Nails dimpled too deeply.
Preventive Action
Correct drying conditions. Embed
tape properly. Use joint compound
thicker. Use ProForm
BRAND Joint
Tape.
Use finishing compound at heavier
viscosity and proper thickness of
coats. Do not over-sand.
Proper thickness of compounds
for taping and finishing. Feather
finishing coats wider than previous
coats. Correct poor framing and
improper wallboard application to
ensure proper alignment. Sand
properly.
Use Quick Set System to
minimize beading or ridging.
Alternatives include: double-layer
lamination system.
Provide heat and ventilation to dry
framing lumber. Align framing
lumber. Nail center of wallboard
first. Hold wallboard firm to nailing
member when nailing. Use proper
nails. Check all nails before nail
spotting. Systems recommended to
reduce or eliminate nail pops
include: double-layer lamination,
double nailing system, floating
angle system, adhesive nail-on
system and screw application.
Align framing lumber. Allow dry
lumber to become acclimated.
Correct wallboard application as
described for nail pops. Use proper
nail spacing. When furring, use no
less than 2" x 2". Use systems
recommended to reduce or elimi-
nate nail pops. Avoid fracturing
paper when driving nails.
Corrective Action
Sand down the tape outline and
seal. Refloat if necessary before
decoration. Prevent finish coat
moisture from re-wetting the tape
by applying a thinner coat for fast
drying.
Allow to thoroughly dry, then apply
an additional coat of topping or
joint compound.
Sand joint to near flush without
sanding into tape. Apply a wider
finishing coat properly feathered, if
necessary. Apply a second finishing
coat or skim coat.
Allow one full heating cycle -- six
months to one year -- before
repairing, then sand ridge flush
and apply one or more finishing
coats of joint or topping com-
pound. Use critical lighting to
determine if bead is eliminated
prior to decoration.
When nail pops occur before deco-
ration, repair immediately. If problem
occurs after decoration, repair after
framing lumber is dry (usually one
heating cycle). To repair, drive a
GWB-54 nail 1-1/2" from each
side of popped nail while holding
wallboard firm to the nailing
member. Countersink popped nail,
remove loose joint compound,
then apply finishing coats of joint
or topping compound.
Repair as described for nail pops,
unless most nails are depressed
and wallboard is loose (usually
ceilings). Re-nail entire surface
using proper spacing. Dimple
depressed nails and apply finishing
coats of joint or topping com-
pound.
Problems and Solutions