Use and Care Guide

19
Conditions
TEXTURING PROBLEMS (cont.)
Poor Coverage
P
oor Hide
Poor Bond or Hardness
Clogged Spray Equipment
Material Pumping Problems
Unsatisfactory Spray Pattern
Texture Buildup
Joint Show-Through
Joint Shows Through
As White Band
Probable Cause
Mix too thick for proper spray vis-
cosity and/or improper application
such as spraying too slow, over-
loading surface with spray material
and using incorrect spray pressures.
Over-thinned mix causing a reduc-
tion in both wet and dry hide. Mix
too thick causing poor atomization
resulting in surface show-through.
Improper application/over-extending
spray. Selecting improper spray
pressures. No primer used prior to
texturing.
Over-thinned mix results in
over-dilution of latex binder in
spray texture. Improper surface
preparation. Contamination with
other materials.
Contamination of mix with over-
sized particles can sometimes clog
spray nozzle orifice.
Mixed spray material too heavy.
Pump equipment old and worn.
Equipment improper size for spray
product.
Worn spray equipment (either fluid
or spray nozzle) and/or improper
air pressure. Improper spray
technique and/or poor spray mix
consistency.
Spraying or texturing over surfaces
with major differences in surface
porosity or suction (improperly
primed). Thin texture will tend to
build up over high suction surfaces.
Over-extended and over-thinned
primer won’t adequately hide the
contrast between finished joints
and gypsum wallboard paper.
Spraying over unprimed surfaces
during cool, humid, slow drying
conditions. Joint stays white, water
solubles in gypsum wallboard
paper bleed through.
Preventive Action
Use recommended water volume
for mixing to ensure sprayable vis-
cosity. Use proper spray application
to ensure uniform dispersion of
aggregate and proper coverage.
Use recommended water volume
for mixing to ensure sprayable vis-
cosity. Use proper spray application
to ensure uniform dispersion of
aggregate and proper coverage.
Use a good quality drywall primer.
Use recommended water volume
for mixing. Remove all loose
material, dust, grease, oil and prime
surface with a quality drywall primer.
Do not intermix with other products.
Always use a clean mixing contain-
er and clean water.
Prevent contamination during
mixing and spraying. Use correct
nozzle size for aggregate being
sprayed.
Use recommended water volume
for mixing. Make sure proper
equipment is being used and that
spray machine is in good repair.
Inspect spray nozzles to ensure
good working condition. Replace
any worn parts.
Prime entire surface with a good
quality drywall primer. Follow
mixing instructions.
Use recommended water volume
when mixing texture and apply at
recommended coverage rates.
Prime surface with a good quality
drywall primer prior to application
of spray texture.
Prime surface with a good quality
drywall primer before applying
texture.
Corrective Action
Carefully add water to mix. Use
proper spray techniques. Adjust
spray pressure.
Add powder or water depending
on mix consistency. Adjust spray
pressure. Use proper spray
technique. Apply finished paint
over textured surface.
Scrape down surface and repeat
application following recommenda-
tions under “Prevention.”
Check mix for contamination and/or
oversized particles. If contaminated,
screen out contaminants or discard
and remix new batch.
Thin mix if too heavy for pumping.
Improve spraying technique. Add
recommended water volume to
ensure proper spraying consistency.
Remove all texture from sprayed
surface and re-apply following
instructions under “Prevention.”
Allow spray to thoroughly dry, then
prime with a quality drywall primer
and re-spray or paint textured
surface.
Allow spray to thoroughly dry, then
paint textured surface.