For ceilings that feature an apex: as long as the height of the apex from the rest of the ceiling is less than 150mm for Heat detectors or less than 600mm for Smoke detectors then these can be treated the same as flat ceilings. For higher apexes, a device should be installed at the highest point. The distance to adjacent devices can be increased by 1% per 1 degree of angle of the roof.

For ceilings that feature an apex: as long as the height of the apex from the rest of the ceiling is less than 150mm for Heat detectors or less than 600mm for Smoke detectors then these can be treated the same as flat ceilings. For higher apexes, a device should be installed at the highest point. The distance to adjacent devices can be increased by 1% per 1 degree of angle of the roof.


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