Size of the slate.
Slating a low pitch roof.
For low pitch slate roofs you should specify siga 65slates from our commercial range sized at 500x300mm and supplied unholed for hook fixing.
Size of the lap.
As low as 2 10 1 75.
Wood shingles require a minimum roof pitch of 3 12 or greater.
Marley mendip tile 123.
As low as 1 38 1 15.
Generally speaking 20 degrees is the lowest advisable pitch for a slate roof depending on the size of the slates and how much that the roof is exposed to moderate weather conditions.
Mineral surfaced roll roofing requires a minimum roof pitch of 1 12 or greater.
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Built up roofs require a minimum roof pitch of 1 4 12 or greater.
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Guidance on these components can be found in british standard bs 5534 2014 the code of practice for slating and tiling.
Type of slate being used.
Easy slate vastly improves the performance of the slates enabling roof pitches as low as 12 degrees.
Although bs 5534 recommends a minimum pitch of 20 ssq has developed a successful slate roofing system that allows the roof s pitch to be reduced to 17 5 generally and under some circumstances as low as 15 in areas considered to be unexposed.
As low as 1 20 1 00.
The best tiles and slates to cover low pitched roofs.
Wood shakes require a minimum roof pitch of 3 12 or greater.
Marley wessex tile 106.
Slate and slate type shingles require a minimum roof pitch of 4 12 or greater.
The slates are still installed in a double lapped pattern so there is no discernible difference in appearance on the roof.
What roof pitch do i need for what slate size.