The total weight of slates on roof can be found from the formula.
Slate tile roof detail.
Read more how much does a slate roof cost.
The standard sizes for roofing slate start at 12 in length and increase by 2 inch increments up to 24 in length.
The cant strip is variable in thickness according to the thickness of the slates being installed thicker slates require a thicker cant strip.
Gable edge projection and drip edge projection can also vary somewhat.
The slate coverage per m2 can be found from table 2 23 9.
Concrete clay roof tiles.
Make a batten gauge block after you have worked out your desired batten gauge consider making a batten gauge block from an offcut of batten.
Weight of slates kg area of roof m 2 slate coverage 1000 therefore the total weight 1235 1000 150 23 9 4427 kg.
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The above illustration shows basic installation details for a traditional standard thickness slate roof.
Slate size roof pitch and exposure 65 mm.