Shingle roofs

The roof’s size and pitch, the layers now, and the ventilation.

• Attach your Sheet so people see your sizes and the math.
• Your town is enough. Never your address; check photos for house numbers and plates.
• Is it safe? A safety question here goes to pros verified in roofing, unless you pick another trade. Only they can call it safe or unsafe.

40′ × 30′ house, 6/12 roof: 1503 sq ft of roof is 50 bundles of shingles (architectural, 10% waste), with the underlayment, ice barrier, drip edge and nails.

What people get wrong:

• High or crooked nails. Nails above or below the nail line, or overdriven, let shingles blow off and void the wind warranty.
• Opening more than you can dry in. A storm on bare deck soaks the ceilings below.
• Old step flashing, no kick-out. Roof-to-wall leaks rot the wall behind the siding for years before they show.

The worked example, every line's math and the code notes · Your own sizes in the app

• Roof leaks: Finding and fixing leaks, flashing and ice dams
• Flat and low-slope roofs: EPDM, TPO and modified bitumen roofs
• Siding: Vinyl, fiber cement and wood siding
• Gutters and downspouts: Sizing, hanging and fixing gutters
• Windows: Replacing windows: inserts, full frame and flashing
• Exterior doors: Entry, patio and storm doors
• Garage doors: Garage doors, openers and springs
• Chimneys and fireplaces: Chimney leaks, crowns, liners and fireplaces
• Stucco: Stucco cracks, patches and new walls
• Every group

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