Shingles for a 2,100 sq ft roof

70 bundles of shingles

for 2,100 sq ft of roof (21 squares) with 10% waste, at 3 bundles per square.

Materials for a 2,100 sq ft roof

Squares21
Bundles, gable roof (10% waste)70
Bundles, hip roof or valleys (15% waste)73
Synthetic underlayment (1,000 sq ft rolls)3
#15 felt (400 sq ft rolls)6
Roofing nailsabout 53 lb

If 2,100 sq ft is the footprint, not the roof

Measured flat from above, a footprint of 2,100 sq ft makes a bigger roof once you account for the slope:

PitchRoof areaSquaresBundles
4/122,214 sq ft22.174
6/122,348 sq ft23.578
8/122,524 sq ft25.284
10/122,734 sq ft27.391
12/122,970 sq ft29.799

Start from your house footprint instead

Shingles needed

70 bundles

2,100 sq ft of roof (21 squares) at 6/12, plus 10% waste.

Roof area2,100 sq ft
Squares21 (order 23.1)
Bundles (3 per square)70 (about $2,800)
Synthetic underlayment3 rolls of 1,000 sq ft
#15 felt6 rolls of 400 sq ft
Roofing nailsabout 53 lb

Other roof sizes

Questions

How many bundles of shingles for a 2,100 sq ft roof?
70 bundles: 21 squares plus 10% waste, at 3 bundles per square. Allow 73 for a hip roof or one with valleys.
How many squares is a 2,100 sq ft roof?
21 squares (a square is 100 sq ft of roof).
How much does it cost to shingle a 2,100 sq ft roof?
Shingles alone run about $2,800 at $40 a bundle. A full asphalt shingle replacement typically costs $4 to $8 per sq ft installed: $8,400 to $16,800.
My house is 2,100 sq ft. How big is the roof?
Bigger than the house. For a one-story 2,100 sq ft house with a 6/12 roof and 1 ft overhangs, the roof is roughly 2,630 sq ft. Two-story homes have about half the roof area for the same floor space.

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