I've got a single storey extension which has a sloping roof up to the side of the main house. I have recently pulled down the ceiling which was a low flat ceiling and am now going to attach plasterboard directly to the rafters so that the ceiling has more height at one end. (i.e. sloping up to the house as well)
I want to install downlighters in this new plasterboard. However the joists are 100mm deep and the downlighters I have found require 110mm clearance. I'm going to use 12.5mm plasterboard so they will fit (just).
Is this OK?
I'm removing any insulataion where the lights are going but is it possible that the lights could set fire to the roofing felt?
Will fire rated downlights stop the felt from getting hot or do they simply stop the spread of fire up through the ceiling?
Any help would be much appreciated.
Chris
I want to install downlighters in this new plasterboard. However the joists are 100mm deep and the downlighters I have found require 110mm clearance. I'm going to use 12.5mm plasterboard so they will fit (just).
Is this OK?
I'm removing any insulataion where the lights are going but is it possible that the lights could set fire to the roofing felt?
Will fire rated downlights stop the felt from getting hot or do they simply stop the spread of fire up through the ceiling?
Any help would be much appreciated.
Chris