Minimum Pitch For Slate Roof

Fixing nails should be of copper or.

Minimum pitch for slate roof.

Nhbc standards would be reliable but in this instance they don t really provide enough information. Generally a slate roof is not installed on a pitch less than 4 12. Deciding on the correct roof pitch for your home very much depends on the style of house you are building or renovating and to a lesser extent your local area. Higher exposure or different sized slates necessitated a greater roof pitch of 22 5 or more.

Minimum required slope x in 12 minimum required slope degrees asphalt shingles. 18 43 asphalt shingles with special underlayment requirements 2 in 12. 35 is considered to be the minimum for slate and clay but if you do need to go below this interlocking concrete tiles are the best option. 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.

At low roof pitches a building will be vulnerable to high rainfall high winds or a maritime location that combines both. Roofing material or system. 11 august 2015 traditionally a minimum roof pitch of 20 was recommended in bs 5534 but modern tiles and slates have now been designed for applications as low as 15. What is the minimum pitch for a roof tile or slate.

Our suggestion is not to contemplate using slates on roofs with a pitch less than 20 degrees and then only for big format slates eg 500x300mm. Posted by sheena owen on 12 oct 2017 the slope of a roof is often referred to as the roof s pitch. With regards to the pitch the building standard code bs 5534 recommends a minimum pitch of 200 for slate roofs. Table 12 states that the minimum pitch for double lap slate roofing is 20 degrees subject to headlap but it gives no further explanation regarding the circumstances in which the minimum would apply.

In 12 0 25 in 12 1 19 built up roof coal tar pitch. The minimum recommended pitch for a natural slate roof is 20 degrees under sheltered or moderate exposure and 22 5 degrees under severe weather exposure. 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.