You consider some alternative solutions.
Minimum pitch for artificial slate roof.
Size of the lap.
Set out key steps if you want to use a low pitch slate roof.
And our brand new mendip 12 5 can be used at an even lower pitch of 12 5 restrictions on rafter length may apply.
The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.
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.
Confirm the exposure level of the site using our annual driving rain index map.
Type of slate being used.
The general recommendation for the minimum pitch for natural slate is 25.
If it is severe very severe a minimum 17 5 pitch is recommended.
Size of the slate.
The cement base of the slate allows for greater flexibility with regards to minimum pitch levels.
It is agreed that the roof pitch should be a minimum of 20 degrees preferably a bit more.
A couple of likely slate suppliers are consulted and they confirm that they are happy to supply 600x300mm slates for a minimum roof pitch of 20 degrees assuming a minimum lap of 125mm.
There are some manufacturers that can go slightly lower such as the siga 56m natural slate which can go down to 20 in some instances if used with slate hook systems.
With regards to the pitch the building standard code bs 5534 recommends a minimum pitch of 20 0 for slate roofs.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
Steps to specifying a low pitch slate roof.
But since there is still a wide variety of slate roofing systems there are occasions when the minimum pitch can go down to as low as 15 0 depending on the uniqueness of the roof.
Pitch of the roof.
What are the minimum pitches for clay or concrete tiles.
Guidance on these components can be found in british standard bs 5534 2014 the code of practice for slating and tiling.
Minimum pitch for slate roof when considering the minimum pitch for a slated roof it is necessary to establish the exposure of the site the length of rafter and the height of the building.
However you can only use this pitch with built up roofing or specialized synthetic roofing.
The recommendations shown above are based on a maximum height to eave of 12m and a maximum rafter length of 9m in moderate exposure and 6m in severe exposure.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
