Slate thickness and weight chart.
Slate roof weight per square.
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.
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.
Based on a 3 headlap.
Average weight for one square of 1 4 thick roofing slate is 800lbs.
Asphalt shingles 3 tab or strip 1 95 lbs.
Weight will very with thickness of the slate.
Weight pounds per square.
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.
Pounds per square foot lb ft 2 pounds per square 100 sq.
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.
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.
3 16 820 lbs.
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.