Minimum Angle For Tiled Roof

You can also read more about the reasons for choosing low pitch tiles and the requirements in our blog.

Minimum angle for tiled roof.

Concrete is long lasting with a minimum lifespan of 50 years depending on climate. Low pitches are often found on extensions to properties where the angle of the roof is limited due to obstructions such as second floor windows. 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. 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 roof slope roof pitch r905 3 2. The minimum slope or pitch fopr atile roof will depend on the exact profile of tile you are using. Some tiles and slates incorporate design features allowing them to be laid at a low minimum pitch. Clay and concrete roof tiles can only be installed on roof slopes of 2 1 2 12 or greater.

The irc recommends a minimum pitch of 2 5 12 for these materials. This means for every 12 horizontal units the roof must rise a minimum of two and one half vertical units. Although the minimum roof pitch for residential homes may vary depending on city and state building codes. However with modern roofing materials such as boral roofing tiles the minimum roof pitch can be as low as 15.

Ratios from that minimum up to 4 12 which are considered low pitch require double underlayment.