Minimum Pitch Plain Clay 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.

Minimum pitch plain clay roof tiles. The irc recommends a minimum pitch of 2 5 12 for these materials. Interlocking clay plain tiles 15 degrees. What is the minimum roof pitch for plain roof tiles. 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.

Plain tiles 35 degrees. Natural slate 25 degrees. Clay single camber plain tiles can pitch down to 30 manufacturer dependant although the vast majority available have a limit of 35. Ratios from that minimum up to 4 12 which are considered low pitch require double underlayment.

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. Concrete is long lasting with a minimum lifespan of 50 years depending on climate. Guidelines for roof sections falling below a 35 pitch. However there is a frequent need to find suitable roof tiles that perform well at low pitches.

Particularly for first floor extensions. Clay pantiles 30 degrees. As a general rule tiles and slates will perform down to the pitches outlined below.