Slate Roof Weight Per Square Metre

Back in 1926 the commercial standard slate thickness was 3 16.

Slate roof weight per square metre.

The weights of other actual products of the same type may vary. How much does slate weigh. Asphalt shingles 3 tab or strip 1 95 lbs. Roofing slate created by nature over 500 million years ago has been used as a roof covering for more than a thousand years.

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 dead load of a typical asphalt shingled wood framed roof is about 15 pounds per square foot. Pounds per square foot lb ft 2 pounds per square 100 sq. This table shows the required number of slates per square metre for effective coverage.

Felt tar and slag roofing 5 ply 5 3 lb m ft 2 25 9 kg m 2 ceramic slate 5 8 lb m ft 2 28 3 kg m 2 reconstituted slate 4 4 lb m ft 2 21 5 kg m 2 clay tile 10 8 lb m ft 2 52 7 kg m 2 asphalt roll roofing 1 1 lb m ft 2 5 4 kg m 2 concrete tile 9 3 lb m ft 2 45 4 kg m 2 slate 1 4 to 3 16 thick 9 1 lb m ft 2 44 4 kg m 2. Here is an example of how the roofing measurement process works on a basic duo pitched roof. The load increases with the use of heavier roofing material. The values shown in the slate coverage chart above are calculated using nominal sizes and incorporate a 5mm jointing gap.

These are the weights of typical actual products. Weight of roofing materials. Ft kilograms per square meter kg m 2 source. That s a great question especially when you are comparing it against other roofing products.

500 x 250mm slate 4 5mm thick 1 889 kg x 18 8 at 75mm lap 35 51kg per square metre. The number of roof slates that are needed depends on the slate size and the lap in mm.