Extension advice - Low / shallow pitch roof

[Mike1983]

Hi all

In the process of getting some initial plans drawn up by an architect. Intending to have a single storey extension for the full width of the house by a projection of 4m.

The architect initially suggested this may not be feasible without a flat roof due to the shallow pitch that would be encountered.

I have however found some examples of tiles that are stated to work (and be guaranteed) down to 10 degrees (see example link below). My extension would be approx 12 degrees.

http://www.forticrete.co.uk/concrete-roof-tiles-and-slates/centurion-Reg--low-pitch-roof-tile.html

Does anyone have any advice / experiences of such things?

Thanks

 

[Mike1983]

Thanks guys. I've passed on all the details to the architect who said he'd not heard of these tiles before but recognises the brand as a decent name. I've also passed on the installation criteria to ensure this is feasible before going any further.

Thanks

 

[Mike1983]

increase the pitch ?

either lower the external wall or increase the height the roof starts at

Thanks for the idea but it's not feasible.
The outermost wall is as low as it will go to achieve the existing / standard 2400mm ceiling height and the roof starts at window ledge level of the upstairs bedrooms.