Minimum Pitch For Slate Roof Tiles

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

Minimum pitch for slate roof tiles.

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. For a 15 pitch the exposure level of site must be sheltered or. 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. Metal roof shingles require a minimum roof pitch of 3 12 or greater.

Steps to specifying a low pitch slate roof. They last from 60 to 200 years with their main problems lying in the fastening material which can rust if made from corrosive substances. All tiles and slates have a minimum roof pitch which is set out in order to protect the roof from water penetration. Slate tile requires a pitch of 4 12 or greater.

Slate tiles whether natural or synthetic are expensive but they can add value to a home because of their appearance. 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. 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. Clay and concrete tile requires a minimum roof pitch of 2 1 2 12 or greater.

If you do have a long rafter length extreme local topography or you are working on a tall building we. Slate and slate type shingles require a minimum roof pitch of 4 12 or greater. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. The minimum pitch for each product can be found in the table below and in the product brochure or within the products pages some tiles and slates incorporate design features allowing them to be laid at a low minimum pitch.