Slate Roof Weight Per Square Metre

The number of roof slates that are needed depends on the slate size and the lap in mm.

Slate roof weight per square metre.

The dead load of a typical asphalt shingled wood framed roof is about 15 pounds per square foot. Asphalt shingles 3 tab or strip 1 95 lbs. Here is an example of how the roofing measurement process works on a basic duo pitched roof. 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.

If the roof pitch is 35 the roof span is 6 5m wide and the roof length is 12 6m using the reference guide graphic above the calculation for the slope would look like this. These are the weights of typical actual products. How much does slate weigh. Ft kilograms per square meter kg m 2 source.

The weights of other actual products of the same type may vary. The load increases with the use of heavier roofing material. Roof span 2 x roof pitch constant for rafter rafter length. Weight of roofing materials.

Pounds per square foot lb ft 2 pounds per square 100 sq. Roofing slate created by nature over 500 million years ago has been used as a roof covering for more than a thousand years. The values shown in the slate coverage chart above are calculated using nominal sizes and incorporate a 5mm jointing gap. 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.

500 x 250mm slate 4 5mm thick 1 889 kg x 18 8 at 75mm lap 35 51kg per square metre. Back in 1926 the commercial standard slate thickness was 3 16.