Length: // 400 mm (16 inches) // 450 mm (18 inches) // 500 mm (20 inches) //. Width: // 150 mm (6 inches) // 175 mm (7 inches) // 200 mm (8 inches) // 225 mm (9 inches) // 250 mm (10 inches) // 275 mm (11 inches) // 300 mm (12 inches) // 350 mm (14 inches) //. Exposure: // 300 mm (12 inches) // 350 mm (14 inches) // 400 mm (16 inches) // 450 mm (18 inches) //. Texture: // Smooth // Medium // Natural Cleft //. SPEC WRITER NOTE: Select 50 mm (2 inch) minimum head lap for roof slopes greater than or equal to 20/12. Select 75 mm (3 inch) minimum head lap for roof slopes 8/12 to 20/12. Select 100 mm (4 inch) minimum head lap for roof slopes 4/12 to 8/12. Head Lap: // 50 mm (2 inches) // 75 mm (3 inches) // 100 mm (4 inches) // minimum. ROOFING Roofing Nails: Nails for Slate Shingles: ASTM F1667, Type 1, Style 23 copper slating nails, 25 mm (1 inch) longer than thickness of slate. Nails for Felt: ASTM F1667, Type I, Style 20, galvanized steel, smooth shanks. ROOFING UNDERLAYMENT Organic Felt: ASTM D226/D226M, Type II, No. 30. SelfAdhering Modified Bituminous Underlayment: ASTM D1970/D1970M. METAL FLASHING Provide metal roof flashings, including apron flashings, step flashings, valley flashings, drip edges, and vent pipe flashings specified in Section 07 60 00, FLASHING AND SHEET METAL. Metal: Copper. Valleys: 1 mm (20 oz., 0.039 inches). Other Locations: 0.55 mm (16 oz., 0.022 inches).
Length: // 400 mm (16 inches) // 450 mm (18 inches) // 500 mm (20 inches) //. Width: // 150 mm (6 inches) // 175 mm (7 inches) // 200 mm (8 inches) // 225 mm (9 inches) // 250 mm (10 inches) // 275 mm (11 inches) // 300 mm (12 inches) // 350 mm (14 inches) //. Exposure: // 300 mm (12 inches) // 350 mm (14 inches) // 400 mm (16 inches) // 450 mm (18 inches) //. Texture: // Smooth // Medium // Natural Cleft //. SPEC WRITER NOTE: Select 50 mm (2 inch) minimum head lap for roof slopes greater than or equal to 20/12. Select 75 mm (3 inch) minimum head lap for roof slopes 8/12 to 20/12. Select 100 mm (4 inch) minimum head lap for roof slopes 4/12 to 8/12. Head Lap: // 50 mm (2 inches) // 75 mm (3 inches) // 100 mm (4 inches) // minimum. ROOFING Roofing Nails: Nails for Slate Shingles: ASTM F1667, Type 1, Style 23 copper slating nails, 25 mm (1 inch) longer than thickness of slate. Nails for Felt: ASTM F1667, Type I, Style 20, galvanized steel, smooth shanks. ROOFING UNDERLAYMENT Organic Felt: ASTM D226/D226M, Type II, No. 30. SelfAdhering Modified Bituminous Underlayment: ASTM D1970/D1970M. METAL FLASHING Provide metal roof flashings, including apron flashings, step flashings, valley flashings, drip edges, and vent pipe flashings specified in Section 07 60 00, FLASHING AND SHEET METAL. Metal: Copper. Valleys: 1 mm (20 oz., 0.039 inches). Other Locations: 0.55 mm (16 oz., 0.022 inches).
VA073126.docx