roof pitched at 15 degrees - dreadnought tiles?

[helski]

Hi,

hoping for some advice from someone in the know. We have an extension with a roof pitched at 15 degrees which was built by the previous owner of the house. He put dreadnought tiles on the roof. Due to some water leakage we've been looking at retiling. My question is - i've heard dreadnought tiles are unsuitable for a roof pitched at only 15 degrees. Is that correct - was the original construction flawed?

Any advice appreciated

 

[Alastairreid]

35 degrees is the minimum pitch for those tiles.
Not so much a design flaw as wrong choice of tile.

http://www.dreadnought-tiles.co.uk/dreadnought-technical-data.htm