SPECIFICATION: Single-Story Ranch Home, Suburban House, Duplex
30×40 Ranch Home Roofing Calculator
A 30×40 ranch house with 16-inch architectural eaves has a 32.7×42.7 foot roof plane (1,396 sq ft flat footprint). At a 5/12 pitch (1.083 multiplier), the true rafter area is 1,512 square feet. Factoring in a 10% contractor cutting waste allowance yields 16.6 squares (50 bundles of shingles).
BUILDING FOOTPRINT1200 SQ FT BASE
ROOF PITCH (SLOPE)5/12 Pitch
Fastener Specification:
Architectural Roof Profile & Pitch Cutaway
PITCH: 5/12 (23°)GABLE ROOF
True Roof Deck Area:
1,510 sq ft
Shingle Yield:
16.6 Squares (50 Bundles)
Architectural Shingle
Synthetic Underlayment
3/4" OSB Roof Decking
Drip Edge & Ridge Vent
Complete Roofing Takeoff List
FIELD SHINGLES:50 Bundles16.6 Squares (3 bundles/sq)
STARTER STRIP:2 Bundles156 lin ft eaves/rakes
RIDGE / HIP CAP:2 Bundles43 lin ft ridge/hips
SYNTHETIC FELT:2 Rolls1,000 sq ft (10 sq) / roll
ICE & WATER SHIELD:3 Rolls200 sq ft / roll (eaves & valleys)
DRIP EDGE METAL:18 Sticks10 ft metal flashing sticks
Frequently Asked Questions: 30×40 Ranch Home Roofing Calculator
How many squares of shingles for a 30x40 house?
A 30x40 ranch home with 16" eaves and a 5/12 pitch requires approximately 16.6 to 17 squares of shingles (50 to 51 bundles).
How many boxes of roofing nails are needed for 17 squares?
One standard master box of 7,200 coil roofing nails is sufficient. Standard 4-nail installation requires ~5,400 nails; high-wind 6-nail installation consumes ~8,100 nails (requiring 2 boxes).