Minimum Pitch For Artificial Slate Roof

Higher exposure or different sized slates necessitated a greater roof pitch of 22 5 or more.

Minimum pitch for artificial slate roof.

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. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. 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. 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.

You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof. Often you express roof pitch as the ratio between the rise and the run in the form of x 12. 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. If you are looking for a roofing solution which involves a low pitch complex roof you have come to the right place.

Slates 450mm long or less should not be used at pitches of 27 5 degrees or less moderate severe exposure bs 5534 2014 page 45. Conventional low pitch slate roofs are recommended down to a minimum of 20 in areas of sheltered or moderate exposure providing a 500x300mm slate is used and a headlap of 115mm. A minimum roof pitch of 20º was traditionally recommended for slate roof tiles however with the advance in technology some slate effect tiles can suit pitches as low as 15º so often artificial slate is the only choice for some homes wanting a slate roof. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.

What are the minimum pitches for clay or concrete tiles. The cement base of the slate allows for greater flexibility with regards to minimum pitch levels. The minimum roof pitch for natural slates is 20 degrees bs 5534 2014 page 45 depending on size of slate see table above bs 5534 2014 page 45 table 9. 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.

Unlike most other roofing materials and even slate from other quarries where sizes larger than 50 25 cannot be achieved ssq slate allows you to design roofs as low as 17 5 in pitch.