USG STRUCTO-LITE Gypsum Plaster - Manual

Preparation In cold weather, all glazing should be completed and the building heated to a minimum of 55 °F (13 °C) before
gypsum base or lath and plaster installation. The temperature of the building must be maintained in uniform range
above 55 °F for an adequate period prior to application of plaster, while plastering is being done, and until plaster is
dry. Heat should be well distributed in all areas, with deflection or protective screens used to prevent concentrated
or irregular heat on the plaster surfaces.
Ventilation and air circulation should be provided to properly dry the plaster subsequent to plaster applications
and proper set. This can be accomplished by keeping windows open sufficiently to provide air circulation in
glazed buildings; in enclosed areas lacking normal ventilation, provisions must be made to mechanically remove
moisture-laden air.
If glazed sashes are not in place and the building is subject to hot, dry winds or temperature differentials from
day to night of 20 °F (11 °C) or more, openings must be screened with cheesecloth or similar material.
Application Mixing S TRUCTO -L ITE Brand Gypsum Plaster contains mill-mixed aggregate, so it is mixed with water only on the jobsite.
Conventional Mix basecoat plaster by hand or in a mechanical mixer to a uniform consistency.
Plaster
Applying Apply the basecoat plaster by hand or machine in one or two coats. Unit masonry surfaces that exhibit high suction
Basecoat shall be moderately wetted immediately before plastering.
For two-coat work over gypsum lath and masonry, apply the S TRUCTO -L ITE Brand Gypsum Plaster basecoat (first
coat) with sufficient material and pressure to form a good bond to the base and to cover well; then double back
to bring the plaster out to grounds. Straighten to a true surface with a rod and darby without the use of addition-
al water and leave rough to receive the finish (second) coat.
For three-coat work, apply the S TRUCTO -L ITE Brand Gypsum Plaster scratch (first) coat with sufficient material
and pressure to form good full keys on metal lath, and good bond on other bases, and then cross-rake. Apply
brown (second) coat after scratch (first) coat has set firm and hard. Bring out to grounds and straighten to a
true surface with a rod and darby without the use of additional water. Leave the brown coat rough to receive
the finish (third) coat.
S
TRUCTO
-L
ITE
®
Brand
Gypsum Plaster
Application Tips
Manufactured by
United States Gypsum Company
125 South Franklin Street
Chicago, IL 60606 800 USG.4YOU (874-4968)
www.usg.com P848/2-04
©2004, United States Gypsum Company
Printed in U.S.A.
Trademarks
The following are trademarks of
United States Gypsum
Company or a related company:
S
TRUCTO -L ITE , USG.
Note
Products described here may
not be available in all geo-
graphic markets. Consult your
U.S. Gypsum Company sales
office or representative for
information.
Notice
We shall not be liable for inci-
dental or consequential dam-
ages, directly or indirectly sus-
tained, nor for any loss caused
by application of these goods
not in accordance with current
printed instructions or for other
than their intended use. Our lia-
bility is expressly limited to
replacement of defective goods.
Any claim shall be deemed
waived unless made in writing
to us within thirty (30) days from
the date it was or reasonably
should have been discovered. SAFETY FIRST!
Follow good safety practices.
Read material safety data
sheets and related literature on
products before specification
and/or installation.