Exterior

Roofing, siding, decking, fencing and insulation.

• Deck board calculator — How many deck boards you need, in the lengths you can actually buy. Uses the real 5.5 in board width and your board gap, and counts the deck screws too.
• Fence picket calculator — How many fence pickets, posts and rails you need for a run of fence. Uses real dressed lumber widths — a 1x6 is 5.5 in, not 6 in — so the count is right.
• Roof shingle calculator — Bundles of shingles for your roof, corrected for pitch. Also gives the starter strip and hip and ridge cap most calculators leave out, so you buy once.