Minimum Angle For Tiled Roof

Although the minimum roof pitch for residential homes may vary depending on city and state building codes.

Minimum angle for tiled roof.

However with modern roofing materials such as boral roofing tiles the minimum roof pitch can be as low as 15. In traditional home construction it was not recommended to have a roof pitch lower than 20. 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. Concrete is long lasting with a minimum lifespan of 50 years depending on climate.

Some tiles and slates incorporate design features allowing them to be laid at a low minimum pitch. 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. Clay and concrete roof tiles can only be installed on roof slopes of 2 1 2 12 or greater. Clay tiles are colorfast which means their tints improve rather than fade over time.

The lowest any tile can usually go is about 15 degrees but some must be steeper. The irc recommends a minimum pitch of 2 5 12 for these materials. Minimum roof slope roof pitch r905 3 2. Ratios from that minimum up to 4 12 which are considered low pitch require double underlayment.

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