Roofing & Outdoor

Divide the deck width by the board width plus gap to get rows, then multiply by the deck length. A 12 × 16 deck needs 29 boards of 16 ft. Chart inside.

Divide the fence length by the post spacing, round up and add one. Here is how corners, gates and different spacings change the count, with examples.

Roof pitch is the rise in inches for every 12 inches of run. Here are four ways to measure it, including from the attic, and a pitch-to-degrees chart.

One roofing square is 100 sq ft. Measure the house footprint with overhangs, multiply by the pitch factor and divide by 100. Chart and examples inside.