Minimum roof slope.

[Willa]

Help or advice please.
What is the minimum roof slope angle?
The tiles are concrete interlocking, course finish.
Supplier I spoke to says there is no set rule.
Can I get away with 18 degrees? If not I have to rethink my layout.
Thanks in advance.

 

[peterpumpkin]

Check out Marley Wessex tiles spec. I had my garage roof done 6 months ago, and I think they say 18 degrees min.

 

[martyc]

Your supplier is wrong, and saying there is no set rule sounds to me like hes only interested in floggin you something...all tiles/cladding have specs.
Search manufacturers specs. and when you fiind what you want then find a different supplier

 

[IJWS15]

Check the tile specs - it is different for different designs of tiles.

Lowest are around 18-20 degrees (e.g. Marley Modern)

 

[noseall]

marley wessex will cope with 15 deg pitch using 75mm headlap.

75mm is the minimum headlap 100mm is usually the max, if you intend using plastic dry-verge.

smooth tiles will will cope with shallower pitches than granular.

most marley granular concrete interlocking tiles will be able to deal with a minimum pitch of 30 degrees, though mendips go down to 25 degrees using a 100mm headlap.

marley smooth concrete interlocking tiles will deal with pitches ranging from 15 degrees upwards.

 

[Willa]

Thanks for the replies. I have been on the Marley website and got all the info.