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.
Slate roof weight per square metre.
Asphalt shingles 3 tab or strip 1 95 lbs.
The values shown in the slate coverage chart above are calculated using nominal sizes and incorporate a 5mm jointing gap.
Roof span 2 x roof pitch constant for rafter rafter length.
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.
Roofing slate created by nature over 500 million years ago has been used as a roof covering for more than a thousand years.
This table shows the required number of slates per square metre for effective coverage.
Ft kilograms per square meter kg m 2 source.
The load increases with the use of heavier roofing material.
Weight of roofing materials.
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.
A clay tiled roof may have a dead.
The number of roof slates that are needed depends on the slate size and the lap in mm.
Back in 1926 the commercial standard slate thickness was 3 16.
Here is an example of how the roofing measurement process works on a basic duo pitched roof.
Pounds per square foot lb ft 2 pounds per square 100 sq.
How much does slate weigh.
That s a great question especially when you are comparing it against other roofing products.
The weights of other actual products of the same type may vary.