Per square smaller roofing slates actually weigh more than larger slates and come in at around 800lbs square while larger slates 12 24 weigh about 700lbs square.
Slate roof weight per square.
Asphalt shingles 3 tab or strip 1 95 lbs.
Average weight for one square of 1 4 thick roofing slate is 800lbs.
These are the weights of typical actual products.
Pounds per square foot lb ft 2 pounds per square 100 sq.
Weight pounds per square.
Based on a 3 headlap.
Weight will very with thickness of the slate.
On average slate measured at approximately 1 4 inch thick weighs between 700 and 800 pounds per square.
Ft kilograms per square meter kg m 2 source.
500 x 250mm slate 4 5mm thick 1 889 kg x 18 8 at 75mm lap 35 51kg per square metre.
Weight of roofing materials.
Davinci slate single width slate widths 12 length 18 thickness at butt 1 2 thickness at tip 1 8 field shingles per roofing square coursing roof pitch max.
3 16 820 lbs.
The weights of other actual products of the same type may vary.
Exposure pieces bundle bundles square weight square nails required straight 6 12 or greater 8 22 6 6 275 lbs 291 sq straight 6 12 or greater 7 5 22 7 1 294 lbs 313 sq.