Use And Care Manual

Construction Guide | 21
Problems and Solutions
JOINT PROBLEMS
Conditions Probable Cause Preventive Action Corrective Action
Tape
Photographing
Slow drying of finishing coats.
Too much compound under
tape. Joint compound too thin.
Correct drying conditions.
Embed tape properly. Use joint
compound thicker. Use ProForm
Paper Joint Tape
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.
Starved Joint Compound applied too thin in
viscosity and thickness. Too
little compound over joint.
Excessive sanding.
Use finishing compound
at heavier viscosity and
proper thickness of coats.
Do not over-sand.
Allow to thoroughly dry, then apply
an additional coat of topping or
joint compound.
High Joint Excess joint compound under
the tape. Excess joint compound
over the tape and improper
feathering. Poor framing.
Improper gypsum board
application. Improper sanding.
Use of compound too heavy.
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.
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.
Beading/Ridging Lumber expansion and
contraction. Improper heating
and ventilation. Cold weather
with high humidity. Improper
application of gypsum board.
Excess compound over joints
and needless wide joints. Rough
or poorly cut butt joint.
Use Quick Set
™
or Quick Set
Lite
™
setting compounds to
minimize beading or ridging.
Alternatives include: double-
layer lamination system.
Allow one full heating cycle —
6 months to 1 year — before
repairing, then sand ridge flush and
apply one or more finishing coats
of joint or topping compound. Use
critical lighting to determine if bead
is eliminated prior to decoration.
NAIL PROBLEMS
Conditions Probable Cause Preventive Action Corrective Action
Nail Pops Framing out of alignment.
Lumber shrinkage. Improper
gypsum board application.
Improper heating and ventilation.
Provide heat and ventilation
to dry framing lumber. Align
framing lumber. Nail center of
wallboard first. Hold gypsum
board 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.
When nail pops occur before
decoration, 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
gypsum board firm to the nailing
member. Countersink popped nail,
remove loose joint compound, then
apply finishing coats of joint or topping
compound.
Depressed Nails Framing out of alignment.
Lumber expansion due to
moisture absorption. Improper
gypsum board application. Too
few nails, improper furring,
structural movement. Nails
dimpled too deeply.
Align framing lumber. Allow
dry lumber to become
acclimated. Correct gypsum
board 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
eliminate nail pops. Avoid
fracturing paper when
driving nails.
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 compound.