Pitch

Tiles with a minimum upstand of 25 mm must not be laid on roof structures less than 12° unless approved in writing by the tile manufacturer, the B.C.A. or the Territorial Authority.

Tiles, shakes or shingles with an upstand of less than 25 mm must not be laid on roof structures less than 15°.

N.B. The pitch of the roof is not the same as the pitch of the tiles because this varies with the height of the batten and the height of the upstand. If the minimum pitch cannot be complied with, a method approved in writing or a producer statement should be given before work is commenced.