2017-059C - Laserfiche WebLink

Home Browse Search

1. Where applicable, neatly cut and remove existing stucco to extent indicated in detail drawings and as required to remove existing stucco stop/counterflashing. 2. Fabricate counterflashing as shown in detail drawings in 10' lengths. 3. Install counterflashing as indicated in detail drawings and secure to receiver flashing 12 inches on center. 4. Counterflashing shall extend a minimum of 1.5 inches below base flashing termination. 5. Notch and lap ends of adjoining sheet metal sections not less than 4"; apply sealant tape between sections. 6. Lap miters at corners a minimum of 1 inch and apply sealant between laps. Rivet at 2" on center. G. Stucco: 1. Preparation: a. Protect adjacent Work areas and finish surfaces from damage during stucco application. b. Ensure substrate is sound, clean, dry, and free of dust, dirt, oils, grease, laitance, efflorescence, mildew, fungus, biological residues, chemical contaminants, and other contaminants that could prevent proper adhesion. C. Clean surface to achieve surface . with texture similar to 100 grit sandpaper. d. Sand or grind edge of existing stucco to ensure adhesion and smooth transition to new material. Sand edges to featheredge. e. Use bonding compounds as required by stucco manufacturer and in accordance with ASTM C932 - 06. 2. Installation: a. New stucco shall be applied in accordance with ASTM C926 -11a and the manufacturer's guidelines. b. Pre -moisten concrete masonry units prior to the placement of stucco (unless bonding agent has been applied). C. Scratch Coat: apply the stucco with sufficient pressure to ensure intimate contact with substrate and complete coverage to an approximate thickness of '/4 -inch. Score the stucco in preparation for a second coat. Score horizontally. d. Brown Coat: as soon as the first coat is firm enough to receive the second coat without damage, apply the second coat. Alternatively, moist cure the first coat up to 48 hours and dampen the scratched surface with water immediately before applying the second coat. Apply the second coat with sufficient pressure to ensure intimate contact with the first coat to an approximate thickness of '/4 -inch. Use a rod or straight edge to bring the surface to a true, even plane. Fill depressions in plane with stucco. e. After the stucco has lost sufficient moisture so that the surface sheen has disappeared, float the surface lightly with a darby or wood float to densify the surface and to provide a smooth, even surface. Float before the stucco becomes so rigid that it cannot be moved beneath the float. f. Moist cure after the stucco has set by lightly fogging the surface for at least 48 hours. Fog as frequently as required during the 48 hour period to prevent loss of moisture from the stucco. Avoid eroding the ,stucco surface with excess moisture. If relative humidity exceeds 75% the IRC Admin Complex Roof Replacements 07 62 00-7 (Revision No. 1) Sheet Metal Flashing and Trim