Roofing

Calculate floor joist count, rim joists, solid blocking, linear footage, board feet, and stock pieces for any room size and joist spacing.

• Framing
• Lumber
• Structural

Estimate roof area from footprint and pitch, then calculate bundles (shingles) or sheets (by coverage).

• Shingles
• Sheets
• Area

Estimate birdsmouth notch depth and height above plate (HAP) from pitch, rafter depth, and seat cut length.

• Rafters
• Pitch
• HAP

Calculate common rafter length from span/run, pitch, ridge allowance, overhang, and waste allowance.

• Rafters
• Pitch
• Length

Calculate rafter lengths, purlin height, total rise, roof surface area, and shingle quantities for gambrel (barn) roofs with upper and lower pitch panels.

• Barn roof
• Rafters
• Shingles

Calculate member lengths, ridge height, and board-foot lumber for King-Post, Queen-Post, Fink (W-truss), Howe, and Pratt roof trusses.

• King-Post
• Fink
• Board feet