Minimum Pitch Clay Tile Roof

The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.

Minimum pitch clay tile roof.

Clay and concrete tile minimum roof slope roof pitch r905 3 2. For many years 20 was recommended as the minimum pitch for clay tiles but this has decreased in the modern era down to 15. This article series explains clay tile roofing types clay roofing tile inspection tile roofing diagnosis tile roof repair. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

On some developments design limitations can arise on comparatively small areas of the roof which restrict the available roof pitch to below 35 which is the minimum pitch recommended for all plain tiles in bs en 5534. Anything lower than this angle is rare and although there are specific products that can go lower 15 is the most common minimum angle for clay tiles. Concrete is long lasting with a minimum lifespan of 50 years depending on climate. 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.

Where the minimum pitch for clay pantiles used to be 30 tiles like the redland cathedral pantile can be pitched as low as 22 5. The international residential code irc specifies a minimum 4 12 pitch 4 inches of vertical rise for every 12 inches of horizontal run for a clay or concrete tile roof except that a pitch as low as 2 1 2 12 is allowed when two layers of underlayment are applied. 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. Tile covered roof installation specifications.

This means for every 12 horizontal units the roof must rise a minimum of two and one half vertical units. Clay and concrete roof tiles can only be installed on roof slopes of 2 1 2 12 or greater. The minimum fixing specifications given in this document is intended to assist the specifier and roof tiler in southern africa to determine the minimum recommended installation and tile fixing specification for each terrain category basic design wind speed building type roof pitch building height length of roof. Guidelines for roof sections falling below a 35 pitch.

Adapted paraphrased with permission from best practices guide to residential construction chapter on best roofing practices. The irc recommends a minimum pitch of 2 5 12 for these materials. Roof slope requirements for tiled roofs.