Operating Guide

ManualsBrandsIMPERIAL Brand ManualsPlaster164849

For strong, abrasion-resistant interior ﬁnishes with veneer plaster

– Durable and stable. I

MPERIAL

Brand Veneer Basecoat offers the durability needed in high-trafﬁc areas.

– Permanent bond. I

MPERIAL Veneer Basecoat bonds to IMPERIAL

Brand Gypsum Base in a positive, permanent manner.

– Provides noncombustibility. When used with I

MPERIAL Gypsum Base, IMPERIAL Brand plaster systems provide ﬁre-

resistant construction.

– Can be applied direct to concrete block or over a bonding agent to monolithic concrete.

– Not affected by decay, dry rot or normal humidity. Will not attract vermin.

Description

MPERIAL Brand plasters are high-strength veneer plasters designed for one- and two-coat application over IMPERIAL

Gypsum Base, applied in 1/16 to 3/32 thickness and producing a hard, 3,000 lb./in.

compressive strength,

abrasion-resistant surface.

MPERIAL Veneer Basecoat, used as the basecoat of two-coat applications, offers the ultimate in performance

and aesthetics. Can be applied to I

MPERIAL Gypsum Base, directly to porous concrete block, or over a bonding

agent on monolithic concrete. The surface of I

MPERIAL Veneer Basecoat must be left rough and open to achieve

proper bond and suction for applying the ﬁnish coat. Failure to do so may result in delamination of the ﬁnish

coat. I

MPERIAL Veneer Basecoat is formulated to receive DIAMOND

Brand Finish, RED TOP

Brand Finish, high-

strength S

TRUCTO-GAUGE

Brand Gauging Plaster/lime putty, RED TOP

Brand Keenes Cement/lime/sand ﬂoat ﬁn-

ish, R

ED T

Brand Gauging/ lime putty ﬁnishes and I

MPERIAL

Brand Finish Plaster.

MPERIAL Brand plasters are recommended for interior wall and ceiling surfaces in all types of construction,

particularly for hard-wear locations where durability and resistance to abrasion are desired.

Limitations 1. Plaster application on masonry or concrete walls or ceilings that have been coated with bituminous compounds

or other waterprooﬁng agents is not recommended. Exterior walls should be furred.

2. Not recommended where contact with water or excessive moisture may be encountered.

3. Over interior monolithic concrete, USG Plaster Bonder must be applied before plastering.

Directions Preparation Protect the product from moisture during storage and on the job. In cold weather, heat the interior of the building

to a minimum of 55 °F (13 °C) for an adequate period before the application of plaster, while basecoat and ﬁnish

are being applied, and until the ﬁnish is dry. Air circulation should be kept at a minimum during this period.

If possible, maintain building temperature-humidity combination in the “normal drying” area of the graph on next

page. When dry conditions exist, relative humidity often can be increased by wetting down the ﬂoor periodically.

During these periods, make every effort to reduce air movement by closing windows and deﬂecting heater blower

and duct output away from the surfaces being plastered. If the building temperature-humidity combination is in

the “rapid drying” area of the graph, or I

MPERIAL Gypsum Base is applied over steel studs, special joint treatment

measures must be taken. These include the use of a S

HEETROCK

Brand DURABOND

Setting-Type Joint Compound or

HEETROCK

Brand EASY SAND

™

Lightweight Setting-Type Joint Compound and SHEETROCK

Brand Joint Tape. Follow

the directions in the “Joint Treatment” section below.

Mixing Mix plaster with a cage-type paddle driven by a heavy-duty drill capable of producing 900-1000 rpm minimum

under no load. Approximate water-plaster ratios for I

MPERIAL Basecoat (hand or machine application) are

5-6.25 qt./50 lb. (5.7-7.1 L/22.7 kg) bag.

Place the water in a 12- to 15-gal. smooth-sided container. Start the mixer, slowly add plaster and mix at

least 2 minutes to disperse lumps completely. Do not mix more than 5 minutes.

Joint Treatment Normal drying conditions Apply IMPERIAL

Brand Tape over all joints (edges and ends). Do not overlap tape

at intersections.

Align I

MPERIAL

Brand Type P (pressure-sensitive) Tape over the joint and press it into place over the entire

length of the joint. Eliminate wrinkles and assure maximum adhesive bond by pressing entire length of tape

with a steel ﬁnishing knife or trowel. Press the tape into corners with a corner tool. Do not overlap.

Alternatively, attach I

MPERIAL

Brand Type S Tape with spring-driven hand stapler using 3/8 staples. Apply two

staples at each end of the tape; staple the remainder at staggered 24 intervals. At wall-ceiling angles,

staple every 18 to 24 along the ceiling edge only. For wall-to-wall interior angles, staple every 18 to 24 on

one edge only, working from top to bottom. Position the tape to bridge the joint at all interior corners without

over-lapping. For ﬁre-rated assemblies, staple either Type P or Type S tape 8 o.c.

Submittal Sheet

09210

Imperial

Veneer Basecoat

Summary of content (4 pages)

PAGE 1
Submittal Sheet 09210 Imperial Veneer Basecoat ® For strong, abrasion-resistant interior finishes with veneer plaster – Durable and stable. IMPERIAL® Brand Veneer Basecoat offers the durability needed in high-traffic areas. – Permanent bond. IMPERIAL Veneer Basecoat bonds to IMPERIAL® Brand Gypsum Base in a positive, permanent manner. – Provides noncombustibility. When used with IMPERIAL Gypsum Base, IMPERIAL Brand plaster systems provide fireresistant construction.
PAGE 2
When building temperature-humidity conditions fall in the “rapid drying” area of the graph or IMPERIAL Gypsum Base is applied over steel studs, use SHEETROCK Joint Tape embedded with DURABOND Setting-Type Joint Compound or EASY SAND Lightweight Setting-Type Joint Compound. Mix the compound in a clean 5-gal. container (plastic is preferred). Use a commercial potato masher or a 1/2 heavy duty 200 to 300 rpm electric drill with a drywall blade-type mixing paddle. Drill speed must not exceed 400 rpm.
PAGE 3
Scratch-in a tight, thin coat of IMPERIAL Basecoat over the entire area, immediately doubling back with plaster from same batch to the full thickness of 1/16 to 3/32 . Fill all voids and imperfections. Leave the surface rough and open for the proper bond of finish coat. Allow the basecoat to set and partially dry to provide proper suction for the finish coat.
PAGE 4
with the consistency adjusted for spray application. With either a hand-held hopper gun or machine application equipment without catalyst spray, apply texture to provide a uniform texture appearance. Vary aggregate grading, aggregate proportion, number of passes over the surface, air pressure and nozzle orifice size as necessary to achieve the desired finish. For more information about spray-applied finishes, see USG literature PM6, Veneer Plaster Application Technique.