Minimum Pitch For Tiled Roof Building Regulations

Modern tiles permit shallow pitch but some of the older traditional coverings such as hand made clay tiles require quite steep slopes to ensure rain does not penetrate the roof covering.

Minimum pitch for tiled roof building regulations.

For projects outside the scope of these guidelines your. The following tableprovides the minimum required allowable roof slope for each type of roofing material mentioned in the code. These linings are applied starting at and parallel to the eaves in 36 inch wide strips with a 19 inch overlap for successive sheets. Due to the fact that there are many roofing styles and different kinds of roofing materials there is no universal minimum roof pitch.

The irc recommends a minimum pitch of 2 5 12 for these materials. Entailed in this document only relate to monier tiled roofs of buildings that are intended for domestic commercial or light industrial purposes for wind classifications n1 n4 and c1 c3 inclusive with a roof pitch of 12 degrees or greater depending on profile. Ratios from that minimum up to 4 12 which are considered low pitch require double underlayment. Mineral surfaced roll roofing requires a minimum roof pitch of 1 12 or greater.

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. Mass nominal mass per tile. Minimum roof pitch15 with sarking and 20 without sarking. Factors affecting minimum roof pitch.

3 1kg mass per sq m. Slate and slate type shingles require a minimum roof pitch of 4 12 or greater. Metal roof shingles require a minimum roof pitch of 3 12 or greater. The minimum roof slope allowed by code for any type of roofis in 12 applicable only to coal tar pitch roof systems.

Shallow pitches are generally cheaper to construct with savings in both timber and tiling. It is uncommon to find a roof below 15 but for those very low pitch applications there are interlocking clay pantiles available suitable for use down to 12 5.