85 Zabriskie Street | Hackensack, NJ 07601 | (201) 457-1900

application instructions



Our national experience has developed methods which produce the best stucco structure most economically. Our recommendations include a sound substrate, metal reinforcement where necessary, the correct preparation of masonry surfaces, the proper materials for the base coat, and the California Stucco finish coat for a strong and durable finish. All these have a direct bearing on a satisfactory stucco job.

stucco coat

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Application for Conventional Cement Stucco

pdf_buttonGeneral Conventional Cement Stucco Exterior Application
pdf_buttonConventional Cement Stucco over E-Z Wall Base
pdf_buttonConventional Cement Stucco over EPS Board

Application of Textureflex

pdf_buttonTexture-Flex Stucco over Conventional Scratch and Brown Coat
pdf_buttonTexture-Flex Stucco over EPS Board
pdf_buttonTexture-Flex Stucco over E-Z Wall Base
pdf_buttonTexture-Flex Stucco for Interior Stucco Applications
pdf_buttonTexture-flex Stucco System for Detail work

DEFINITIONS

SCRATCH COAT

Mixture to include one 94 pound bag of portland cement type I, one 80 pound bag of mortar type M, 2 bags of fibers* and 40 shovels of clean, sharp sand. Approximate coverage is 200 square feet at 3/8".

BROWN COAT

Mixture to include one 94-pound bag of portland cement type I, one 80-pound bag of mortar type M, 2 bags of fibers* and 44 shovels of clean, sharp sand. Approximate coverage is 200 square feet at 3/8".

*When mixing scratch and brown coat it is recommended that 1/2'' (13-mm) long fibers (fiberglass, polypropylene, or nylon) be added into the mix of the stucco base coat.

The use of fibers improves cohesiveness and provides stucco with crack-and-impact-resistant qualities. Fibers to be alkali-resistant. Refer to ASTM, C-1116.

DASH COAT

Mixture to include Portland cement and 0-2% aggregate combined to a slurry consistency. Dash with brush or trowel against wall, leaving undisturbed for 24 hours to allow for an uninterrupted bond.

FINISH COAT

To maintain color uniformity, be sure to add consistent and measured amounts of clean water from batch to batch. Add 2-2 1/4 gallons of water per bag of California Stucco. Mix with a power mixer for at least 15 minutes to insure proper hydration. If hand mixed, allow 15 minutes slack time. Never attempt to rework material that has partially set. It is important not to add water to the trowel finish. Approximate coverage is 50 square feet. The quality of the stucco will be greatly improved by wetting thoroughly for a minimum of two consecutive days.

TEMPERATURE

In cold weather, we recommend that white stucco be chosen instead of colored stucco because of white efflorescence leaching out to the surface of the stucco from the cement. Stucco should not be applied unless temperature is above 40 degrees F for two consecutive days.

ADDITIVES

Under no circumstances are additives to be used in the California Stucco mix. These include rapid binders, antifreeze, accelerators and retardants. Such additives will result in an unwarranted product.

  1. When scratch and brown coats are applied, two coats of approximately 3/8'' each or a combined minimum thickness of 3/4'' are required prior to finish coat.

  2. It has become an accepted practice to double back with the brown coat as soon as the scratch coat is sufficiently rigid to accept the second coat. The two coats can be put into place in a single day.

  3. Moisten base coat for a minimum of two consecutive days.

  4. Allow two weeks for base coat to cure prior to applying finish coat.

  5. When applying finish coat lay out to permit the completion of the entire wall surface or elevation in one operation. If this is impractical, the finish coat shall be carried to some natural breaking point, such as doors, windows, belt courses, inside and outside corners.

  6. On retaining walls, install conventional California Stucco, do not install Texture-Flex, Rollflex or Elastocote.

  7. When using Texture-Flex, Rollflex or Elastocote do not use galvanized accessories, use vinyl or zinc.

  8. Do not apply waterproofing to cement stucco. Doing so may cause rusting and damage the stucco.

  9. Do not apply finish coats in direct sun light and complete each elevation in the same day.


stucco application


New Block/Brick

application-new

Install Portland scratch and brown coats or E-Z Wall Base Coats to a minimum of 3/8" then California Stucco finish coat as in the case of frame construction. Masonry surfaces not sufficiently rough enough to provide a good mechanical key (i.e. monolithic concrete) and where metal lath is not required, a dash coat should be applied providing the surface is free from oil and other elements that would inhibit an adequate bond. California Stucco finish can then be applied. Exterior acrylic bonding agents may be used in the preparation of the masonry substrate but only under direct supervision of a journeyman plasterer.

Old block, brick or Painted Stucco

application-old

Install metal reinforcing using self-furring galvanized mesh, nailing into horizontal joints. Apply Portland scratch and brown coats, or E-Z Wall and California Stucco finish coat as in the case of frame construction. In the case of painted masonry where powerwash or sandblasting does not reveal a good mechanical key, this procedure is required. Exterior acrylic bonding agents may be used in the preparation of the masonry substrate, but only under direct supervision of a journeyman plasterer.