Minimum Roof Angles 15 - 20 degrees Tiles

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Hello

Basically I would like to use those ACME Sandstorm tiles that 1930's homes have, as it's in keeping with character, etc etc on a extension, but I would like to have a pitch between 15 to 20 degrees, not sure yet on exact angle.

But I am unsure if planning will allow such a low pitch with those type of tile. My neighbour has a extension with those tiles at 18 degrees and he hasn't had any leaks, and that was done in the 1970's.

I am not sure if I can you that as a reasoning. Also to find the minimum pitch for that tile, do I need to just find a modern equivalent, and use their minimum angle?

Regards
 
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some interlocking clay roof tiles have a minimum pitch of 15 degrees

or use any tile you like and have a weather proof sub roof system


I wouldve thought it would be a building regs issue not planning
 
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Acme or Rosemary tiles specify a minimum pitch of 30 degrees. You can buy new ones that match the colour of the reclaimed ones. However, your pitch is too low for that sort of tile and you'll end up relying on the membrane underneath for water tightness.

We used forticrete Gemini for our extension which go down to 22.5 degrees and look very similar to the original Rosemary tiles we have on the existing 1920's roof.
 

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