NUMBER OF SLATES PER SQUARE
| Size Inches | Number of Pieces | Size Inches | Number of Pieces | Size Inches | Number of Pieces |
|---|---|---|---|---|---|
| 6 × 12 | 533 | 9 × 16 | 246 | 14 × 20 | 121 |
| 7 × 12 | 457 | 10 × 16 | 221 | 11 × 22 | 138 |
| 8 × 12 | 400 | 9 × 18 | 213 | 12 × 22 | 126 |
| 9 × 12 | 355 | 10 × 18 | 192 | 13 × 22 | 116 |
| 7 × 14 | 374 | 11 × 18 | 174 | 14 × 22 | 108 |
| 8 × 14 | 327 | 12 × 18 | 160 | 12 × 24 | 114 |
| 9 × 14 | 291 | 10 × 20 | 169 | 13 × 24 | 105 |
| 10 × 14 | 261 | 11 × 20 | 154 | 14 × 24 | 98 |
| 8 × 16 | 277 | 12 × 20 | 141 | 16 × 24 | 86 |
In [Table XII] is given a list of the different colors of slate used in the Eastern and Middle States, the quarries from which they are obtained, and the cost of slate, labor, etc. per square, pertaining to each variety. The prices in the table are based on the 8 in. × 12 in. or 9 in. × 18 in. sizes, thickness five to 1 inch, and for quantities of not less than 50 squares. The cost of labor, etc. being based on current prices in the aforementioned territory.
Slate ¼ inch thick cost about 20 per cent. more than the five to 1 inch for the material, and about 5 per cent. more for laying and freight.
Slate ⅜ inch thick cost about 45 per cent. more than the five to 1 inch for the material, and about 15 per cent. more for laying and freight.
When copper nails are specified obtain current prices.
TABLE XII
APPROXIMATE COST OF SLATING,
PER SQUARE
| Classification | Cost of Slate F. O. B. Quarries | Cost of Laying, Including Roofing Felt, and Freight | Total Cost, Exclusive of Builder’s Profit |
|---|---|---|---|
| Black Slate | |||
| Brownville, Maine | $8.00 | $5.00 | $13.00 |
| Monson, Maine | 7.00 | 5.00 | 12.00 |
| Peach Bottom, Pennsylvania | 5.50 | 4.00 | 9.50 |
| Chapman (Hard Vein), Pennsylvania | 4.50 | 3.50 | 8.00 |
| Bangor, Pennsylvania | 4.50 | 3.50 | 8.00 |
| Lehigh, Pennsylvania | 4.00 | 3.50 | 7.50 |
| Buckingham, Virginia | 3.75 | 4.00 | 7.75 |
| Red Slate | |||
| Vermont | 12.00 | 4.25 | 16.25 |
| Green Slate | |||
| Vermont | 5.50 | 4.25 | 9.75 |
| Purple Slate | |||
| Vermont | 5.00 | 4.25 | 9.25 |
| Mottled Slate | |||
| Vermont (Purple and Green) | 4.00 | 4.25 | 8.25 |
59. Sheet-Metal Roofs.—In estimating sheet-metal roofs, the hips and valleys are measured extra their entire length by 1 foot in width, to compensate for increased labor and waste of material in cutting and laying. Gutters and conductor pipes, or leaders, are measured by the linear foot, 1 foot extra being added for each angle. All flashings and crestings are measured by the linear foot. No deductions are made for openings (chimneys, skylights, ventilators, or dormer-windows) if they are less than 50 square feet in area; if between 50 and 100 square feet, one-half the area is deducted; if over 100 square feet, the whole opening is deducted. An extra charge is made for labor and waste of material to flash around openings.