2021-082F - Laserfiche WebLink

Home Browse Search

INDIAN RIVER COUNTY COURTHOUSE METAL ROOFING REPLACEMENT PROJECT JANUARY 15, 2021 PAGE 4 SECTION 092513 ACRYLIC PLASTER FINISH D. Examine framing, grounds, and accessories to ensure that finished plaster surfaces will be true to line, level and plumb, without requiring additional thicknesses of plaster. Soffit board surface shall not have irregularities in excess of 1/16". 3.02 PREPARATION A. Cover or otherwise protect finish materials subject to damage by plaster. B. Cover and protect all adjacent surfaces from plaster stains, including surfaces which will be covered by other finish materials. 3.03 MIXING A. Mix products in accordance with manufacturer's published literature. Refer to applicable product bulletins for specific information on use, handling,. application, precautions and limitations of specific products. 3.04 APPLICATION A. General: 1. Install corrosion proof termination accessories per ASTM D1784 (PVC) with perforated flanges for keying of the base coat at junctures with penetrations such as soffit vents, electrical fixtures, and with abutting walls and columns. Install corrosion proof control joints per ASTM D1784 (PVC) with perforated flanges for keying of the base coat at intervals as required by the soffit board manufacturer. 2. Reinforce perforated flanges of accessories with minimum 4 inch (102 mm) wide strips mesh embedded in base coat. Where cement board is used tape joints between boards with minimum 4 inch (102 mm) wide mesh and skim with base coat. Alternatively tape joints with minimum 4 inch (1023 mm) wide mesh embedded in base coat. Allow base coat to dry. 3. Install nominal 1/8 -inch (3 mm) base coat by trowel to the soffit/ceiling board surface. Work horizontally or vertically in strips of 40 inches (1016 mm), and immediately embed the mesh into the wet base coat by troweling from the center to the edge of the mesh. Overlap mesh installed at perforated accessory flanges by installing mesh up to the termination bead of the accessory. Overlap mesh not less than 2-'/2 inches (64 mm) at mesh seams and feather at seams. Double wrap all inside and outside corners with minimum 8 -inch (203 mm) overlap in each direction (except where corner bead is used at outside corners lap mesh over perforated flange of accessory). Avoid wrinkles in the mesh. The mesh must be fully embedded so that no mesh color shows through the base coat when it is dry. Re -skim with additional base coat if mesh color is visible. Do not install base coat and mesh onto solid (unperforated) portions of accessories. 4. When the base coat application is dry apply the primer by brush or roller to the entire base coat surface. 5. When the primer application is dry apply the textured finish by trowel. Apply finish in a continuous application, and work to a wet edge. Float the finish to achieve the desired texture.