I currently have some fire rated downlighters that I want to fit in my garage conversion. First if all the ceiling is 12.5mm plasterboard an then it's insulated with 2 layers of 100mm celotex on top of each other. My question is how much space around the fitting do I have to remove from the insulation? Also should I just cut a whole through both sheets of celotex to vent the lights?
Downlighters+celotex=your help
- Thread starter Tedbow
- Start date
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Will it contravene building regulation, relating to the thermal performance of the building if you remove any insulation?
You are mad, you have a nice cozy room and you want to turn the ceiling into swiss cheese and let all the heat out.
Most downlights require 100mm clear all around them, you wont be able to do that through the downlight hole, unless you are a gaenocologist.
Suggest you look for a different type of light fitting - surface mounted.
Most downlights require 100mm clear all around them, you wont be able to do that through the downlight hole, unless you are a gaenocologist.
Suggest you look for a different type of light fitting - surface mounted.
You will need to be guided by the manufacturers instructions for the downlights and what celotex advise.
Having just done an extension with similar insulation properties I seem to recall celotex do not advise using downlights near their material since the required space around the downlight (anything from 100mm to 300mm) will affect the insulation qualities that your designer/architect would have calculated and shown in your plans - these would have been also assessed and passed by building control.
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You can't, not legally.
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