Installation Guide

22
Problems And Solutions
Conditions
Texturing Problems
Lumping
Mix Too Thin
Aggregate Fallout
(During Spraying)
Aggregate Floatout
Poor Coverage
Poor Hide
Poor Bond Or Hardness
Clogged Spray Equipment
Material Pumping Problems
Unsatisfactory Spray Pattern
Probable Cause
Too much water added to initial
mix. Adding water to powder.
Too much water added in initial
mix or inadequate soaking time in
cold water.
Spray gun too close to surface and/
or excessive air pressure at nozzle.
Too much water added during
initial mix and/or inadequate mixing
after initial water is added.
Mix too thick for proper spray viscos-
ity and/or improper application such
as spraying too slow, overloading
surface with spray material and
using incorrect spray pressures.
Over-thinned mix causing a reduction
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.
Preventive Action
Add powder to water using less
water than initially specified. After
mix is smooth and lump-free, add
remaining water to adjust mix to a
workable viscosity.
Use recommended water require-
ments in initial mix. Allow mixed
ingredients to soak for several
minutes, when necessary, if using
cold water.
Hold spray gun at proper distance
and angle from surface to prevent
aggregate fallout.
Use recommended water require-
ments and make sure water is
properly blended into mix.
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
viscosity. Use proper spray applica-
tion 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 container 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.
Corrective Action
Add powder until mix thickens.
Continue mixing until lumps
disappear.
Add powder until mix thickens.
Lower air pressure. Hold spray gun
at proper distance and angle from
surface to prevent excessive fallout.
Add powder until mix thickens.
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 contami-
nated, 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.