Shingles for a 3,400 sq ft roof

113 bundles of shingles

for 3,400 sq ft of roof (34 squares) with 10% waste, at 3 bundles per square.

Materials for a 3,400 sq ft roof

Squares34
Bundles, gable roof (10% waste)113
Bundles, hip roof or valleys (15% waste)118
Synthetic underlayment (1,000 sq ft rolls)4
#15 felt (400 sq ft rolls)9
Roofing nailsabout 86 lb

If 3,400 sq ft is the footprint, not the roof

Measured flat from above, a footprint of 3,400 sq ft makes a bigger roof once you account for the slope:

PitchRoof areaSquaresBundles
4/123,584 sq ft35.8119
6/123,801 sq ft38126
8/124,086 sq ft40.9135
10/124,426 sq ft44.3147
12/124,808 sq ft48.1159

Start from your house footprint instead

Shingles needed

113 bundles

3,400 sq ft of roof (34 squares) at 6/12, plus 10% waste.

Roof area3,400 sq ft
Squares34 (order 37.4)
Bundles (3 per square)113 (about $4,520)
Synthetic underlayment4 rolls of 1,000 sq ft
#15 felt9 rolls of 400 sq ft
Roofing nailsabout 86 lb

Other roof sizes

Questions

How many bundles of shingles for a 3,400 sq ft roof?
113 bundles: 34 squares plus 10% waste, at 3 bundles per square. Allow 118 for a hip roof or one with valleys.
How many squares is a 3,400 sq ft roof?
34 squares (a square is 100 sq ft of roof).
How much does it cost to shingle a 3,400 sq ft roof?
Shingles alone run about $4,520 at $40 a bundle. A full asphalt shingle replacement typically costs $4 to $8 per sq ft installed: $13,600 to $27,200.
My house is 3,400 sq ft. How big is the roof?
Bigger than the house. For a one-story 3,400 sq ft house with a 6/12 roof and 1 ft overhangs, the roof is roughly 4,260 sq ft. Two-story homes have about half the roof area for the same floor space.

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