Weight will very with thickness of the slate.
Slate roof weight per square.
Average weight for one square of 1 4 thick roofing slate is 800lbs.
Weight per square metre to calculate the weight per square metre simply multiply the weight per slate given below by the number of slates per square metre for the same slate listed above.
The weights of other actual products of the same type may vary.
Asphalt shingles 3 tab or strip 1 95 lbs.
Weight pounds per square.
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.
500 x 250mm slate 4 5mm thick 1 889 kg x 18 8 at 75mm lap 35 51kg per square metre.
Slate thickness and weight chart.
Weight of roofing materials.
These are the weights of typical actual products.
Pounds per square foot lb ft 2 pounds per square 100 sq.
Ft kilograms per square meter kg m 2 source.
On average slate measured at approximately 1 4 inch thick weighs between 700 and 800 pounds per square.
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.
Weight per slate in kilogrammes.