Minimum Pitch Clay Tile Roof

What is the minimum slope for a clay or concrete tile roof.

Minimum pitch clay tile roof.

However there is a frequent need to find suitable roof tiles that perform well at low pitches. Particularly for first floor extensions. Plain tiles 35 degrees. Natural slate 25 degrees.

Interlocking clay plain tiles 15 degrees. Clay pantiles 30 degrees. Concrete is long lasting with a minimum lifespan of 50 years depending on climate. Ratios from that minimum up to 4 12 which are considered low pitch require double underlayment.

What are the minimum pitches for clay or concrete tiles. The irc recommends a minimum pitch of 2 5 12 for these materials. Sunday july 1 2018 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. Mineral surfaced roll roofing requires a minimum roof pitch of 1 12 or greater.

Clay and concrete tile requires a minimum roof pitch of 2 1 2 12 or greater. For many years 20 was recommended as the minimum pitch for clay tiles but this has decreased in the modern era down to 15. Clay tiles are colorfast which means their tints improve rather than fade over time. 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.

As a general rule tiles and slates will perform down to the pitches outlined below.