Use And Care Manual

Construction Guide | 23
TEXTURING PROBLEMS (CONT.)
Conditions Probable Cause Preventive Action Corrective Action
Texture Buildup 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.
Prime entire surface with a good
quality drywall primer. Follow
mixing instructions.
Remove all texture from
sprayed surface and re-apply
following instructions under
Preventative Action.
Joint Show-Through Over-extended and over-thinned primer
won’t adequately hide the contrast
between finished joints and gypsum
board paper.
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.
Allow spray to thoroughly dry,
then prime with a quality drywall
primer and re-spray or paint
textured surface.
Joint Shows
Through as
White Band
Spraying over unprimed surfaces during
cool, humid, slow drying conditions. Joint
stays white, water solubles in gypsum
board paper bleed through.
Prime surface with a good
quality drywall primer before
applying texture.
Allow spray to thoroughly dry,
then paint textured surface.
SHRINKAGE PROBLEMS
Conditions Probable Cause Preventive Action Corrective Action
Shrinkage Compound used too thin or watery.
Applied too soon after mixing. Improper
drying between coats. Painting before
joints are thoroughly dry. Too deep fills
in one coat. Slow drying.
Use compound at heaviest workable
consistency. Allow to stand before
using. Allow thorough drying of
compound between coats and prior
to painting. Apply additional coats on
deep fills. Provide proper drying.
Allow to thoroughly dry and
re-coat. Provide proper drying.
Delayed Shrinkage Improper drying conditions. Painting
before compound and wallboard are
thoroughly dry. Under high humidity, slow
drying conditions, joints and wallboard
may hold moisture for weeks.
Provide proper drying conditions.
Allow complete drying before
each coat of joint treatment and
before repainting.
Allow to thoroughly dry and
re-coat affected joints.
Misinterpreted
Shrinkage
Improper wallboard application
including: nails dimpled too deep,
fractured core of wallboard, fractured
face paper, corner bead applied
improperly, tape photographing.
Less dimple of nails. Press
wallboard snug to nailing member
before dimpling nail. Re-nail where
necessary. Use ProForm Quick Set
compound for at least the first
coat on nails and corner bead.
(See Tape Photographing.)
Nails: re-nail where necessary.
Cut out any loose areas and fill with
two or more coats of Quick Set or
regular joint compound. Re-coat
corner bead.
MISCELLANEOUS PROBLEMS
Conditions Probable Cause Preventive Action Corrective Action
Pock Marking Entrapment of air in the mixed
compound and in application. Over-
mixing of compound. Compound
mixed too thin. Heavy fills. Improper
application technique. Compound
applied too loosely.
Mix compound as quickly as possible
and let stand until binder is in solution
before remixing. Mechanical mixers
should have 500 RPM maximum. Use
heavier mix. Make additional passes
over joints and bead with hand or
mechanical tools. File trowel edges
square regularly to avoid entrapment
in application. Apply compound thinly
and use more pressure on finish coat.
Remove sanding dust that may
collect in “pocks” prior to painting
and refloat joint as necessary. When
condition exists after painting, float
with compound and repaint.