When using this handy chart, deduct one single roll for each door, for every two average windows, or similar-size openings in the room.
| Height of Ceiling | ||||
| æ | 7 ft. | 8 or 9 ft. | 10, 11 or 12 ft. | Rolls of Ceiling |
| Size of Room
(in feet) | Single rolls | Single rolls | Single rolls | Single rolls |
| 6 x 10 | 7 | 8 | 11 | 3 |
| 6 x 12 or
8 x 10 | 8 | 9 | 12 | 3 |
| 8 x 12 | 8 | 12 | 14 | 3 |
| 8 x 14 or
10 x 12 | 9 | 11 | 15 | 4 |
| 9 x 12 | 9 | 11 | 15 | 5 |
| 9 x 14 | 10 | 12 | 16 | 5 |
| 9 x 16 | 11 | 13 | 18 | 5 |
| 10 x 14 or
12 x 12 | 10 | 12 | 16 | 5 |
| 10 x 16 or
12 x 14 | 11 | 13 | 18 | 6 |
| 12 x 16 or
14 x 14 | 12 | 14 | 19 | 7 |
| 12 x 18 or
14 x 16 | 12 | 15 | 20 | 7 |
| 14 x 18 or
16 x 16 | 13 | 16 | 22 | 8 |
| 16 x 18 | 14 | 17 | 23 | 8 |
| 16 x 20 | 15 | 18 | 24 | 10 |
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