luckpandaHow to use the roofing estimate
- Measure the roof and convert it to squares, adding waste.
- Price tear-off, materials and installation per square.
- Add flashing and ventilation, and a per-sheet allowance for rotten decking.
- Set the validity and deposit terms, then save.
Worked example: 24-square asphalt re-roof
26 squares (sq) is the 24 measured plus about 8% waste. The decking line is an allowance: if fewer sheets need replacing, the invoice is lower.
| Line | Qty | Rate | Amount |
|---|---|---|---|
| Tear-off, 1 layer | 26 sq | 85.00 | 2,210.00 |
| Shingles, installed | 26 sq | 385.00 | 10,010.00 |
| Underlayment and ice shield | 26 sq | 45.00 | 1,170.00 |
| Ridge vent, flashing | 1 | 650.00 | 650.00 |
| Decking, per sheet | 8 | 95.00 | 760.00 |
| Estimate total | 14,800.00 |
What a roofing estimate should state
- Roof measurements and squares, including waste
- Number of layers being removed
- Shingle or membrane make, product line and colour
- Underlayment, ice and water shield, drip edge and ventilation
- Flashing around chimneys, walls and skylights
- Unit price for extra decking
- Permit, dumpster and clean-up
- Manufacturer and workmanship warranty
- Licence and insurance details