Metric Gable Roof Sheathing

The Metric Gable Roof Sheathing Calculator is a tool that uses metric measurements to help you accurately estimate the amount of plywood needed to cover a gable roof. By entering the building length and width in meters, overhangs in millimetres, and the roof pitch, users can calculate the total roof area and the number of plywood sheets required, including the additional waste factor.

Calculator

1. enter the length of the building in metres
2. the building width ("gable side") in metres
3. the gable overhang in millimetres
4. the eave overhang in millimetres
5. the roof pitch as a ratio of rise per 12 units (e.g., a 4 for a 4:12, etc.)
6. the percentage of material waste expected during the roofing project (default is 10%)

Results

1. roof area in square metres
2. the estimated number of plywood sheets required to cover the calculated roof area (each sheet of plywood in this metric calculation covers approximately 2.9768 m²)
3. additional plywood sheets needed due to waste, calculated based on the waste percentage
4. the number of sheets required, including the waste