Forticrete centurion to my knowledge 10 is the absolute lowest you can achieve with a concrete tile and the forticrete centurion is the only one tested at this low pitch.
Low pitch plain concrete roof tiles.
Edgemere interlocking slate is a large format concrete roof covering with a thin leading edge for a slate like appearance.
Types of tile recommended pitch.
For more information see our blog post on batten spacing for roof tiles.
Additionally there are some concrete tiles available that can be laid as low as 10 although these are not too commonly used.
This means many of the tiles previously used on low pitched roofs for purely aesthetic reasons have improved in functionality.
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.
Low pitch roof tiles are thought of as those that are suitable for laying on roofs at 20 degrees or less.
With the introduction of machine made clay tiles this has now dropped slightly to 30 similar to the marley hawkins single camber tile.
In most instances 35 will be the minimum pitch for plain concrete tiles which is another reason why the material is the preferred choice for those who use them regularly.
Concrete tiles and slates for low roof pitches.
Decra classic these are coated zinc aluminium galvanised steel tile panels with the appearance of traditional concrete 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.
They can be used at pitches as low as 12 5 degrees with a headlap of 92mm with rafter lengths up to 6 metres.
Previously it was accepted that 35 was the lowest recommended pitch for both concrete and clay variants of the tile.
Clay single camber plain tiles can pitch down to 30 manufacturer dependant although the vast majority available have a limit of 35.
As a general rule 15 is the minimum pitch for concrete tiles which has decreased from the original recommended level of 20.