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.
Minimum slope for slate roof uk.
Express the slope of a metal roof by a ratio which indicates the pitch of the roof.
The general recommendation for the minimum pitch for natural slate is 25.
The minimum pitch for each product can be found in the table below and in the product brochure or within the products pages.
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.
Roof pitch 40 roof area m 2 150 length of roof slope m 9 5 the headlap can be found from table 1 by reference to slate size roof pitch and exposure 65 mm.
The minimum slope of a roof depends on the roof s profile.
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.
Built up roofs require a minimum roof pitch of 1 4 12 or greater.
Mineral surfaced roll roofing requires a minimum roof pitch of 1 12 or greater.
Wood shakes require a minimum roof pitch of 3 12 or greater.
You need to consider the slope requirements of each panel to determine this minimum slope.
The slate coverage per m2 can be found from table 2 23 9.
The total weight of slates on roof can be found from the formula.
What are the minimum pitches for clay or concrete tiles.
Some tiles and slates incorporate design features allowing them to be laid at a low minimum pitch.
Low pitches are often found on extensions to properties where the angle of the roof is limited due to obstructions such as.
Higher exposure or different sized slates necessitated a greater roof pitch of 22 5 or more.
The profile is the shape taken by the sheets when you bend them to form panels.
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.
These factors include the pitch of the roof the type of slate being used the size of the lap the size of the slate as well as the site s exposure rating.
And our brand new mendip 12 5 can be used at an even lower pitch of 12 5 restrictions on rafter length may apply.
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.
Slate and slate type shingles require a minimum roof pitch of 4 12 or greater.
Wood shingles require a minimum roof pitch of 3 12 or greater.
