And our brand new mendip 12 5 can be used at an even lower pitch of 12 5 restrictions on rafter length may apply.
Minimum pitch for artificial slate roof.
Pitch of the roof.
Our melodie interlocking clay pantile can be used in roof pitches as low as a 12 5 our wessex and mendip concrete roof tiles can be used down to a minimum 15 pitch.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
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.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
Confirm the exposure level of the site using our annual driving rain index map.
You consider some alternative solutions.
For a 15 pitch the exposure level of site must be sheltered or moderate.
The general recommendation for the minimum pitch for natural slate is 25.
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.
Type of slate being used.
However you can only use this pitch with built up roofing or specialized synthetic roofing.
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.
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.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
Steps to specifying a low pitch slate roof.
Guidance on these components can be found in british standard bs 5534 2014 the code of practice for slating and tiling.
The marley birkdale slate mentioned above can be used on pitches down to 15 and another example is the marley thrutone which also can be laid as low as 15.
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.
What are the minimum pitches for clay or concrete tiles.
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.
The cement base of the slate allows for greater flexibility with regards to minimum pitch levels.
Set out key steps if you want to use a low pitch slate roof.
Size of the lap.
It is agreed that the roof pitch should be a minimum of 20 degrees preferably a bit more.
If it is severe very severe a minimum 17 5 pitch is recommended.
