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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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Installing recessed lighting in a Celotex insulated flat roof
I'm planning to install recessed lighting (GU - 50W, 8 of them) in the
ceiling of a flat roof extension (the ceiling is 12'x18' approx, 200mm joists). The ceiling is to be insulated with Celotex (140mm), but I'm told by Celotex that you should not install recessed lights in a ceiling insulated with Celotex ! The main reasons they give are that it compromises the U value of the roof, since you have to cut holes in the celotex to accomodate the recessed fitting. I looked at fire-caps to sit over the recessed lights - they help with heat loss and noise, and of course stop potential fires getting into the ceiling too quickly - but again the fire-cap people suggest not to put recessed lights into a Celotex insulated ceiling. Help ! I see plenty of programs/articles where people have recessed lights in flat roof ceilings - how do they do it ? Do they use Celotex ? How big are the holes they cut in the Celotex ? Do they use something else to insulate the ceiling ? Do you use fire-caps ? Any ideas much appreciated. Steve... |
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Installing recessed lighting in a Celotex insulated flat roof
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Installing recessed lighting in a Celotex insulated flat roof
I only see dichroic ones. Personally, I wouldn't dream of using large
numbers of downlights for general lighting. They are more appropriate to task and accent lighting. How many you put in is not the issue - its more to do with HOW you put them in. |
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Installing recessed lighting in a Celotex insulated flat roof
I have loads of 50W LV's for general lighting in my ceilings. Some are
near celotex. The rest are near rockwool. Proividd you leave a few inches around the,m and make sure they are not near combustble material (right alonsgide joists) and ensure that no combustile materail *thatch, birds nets etc) can drop onto them, they are fine. The best solution I heard here was put an inverted flowerpot over the top Lets face it they have PVC covered wire feeding them, and that burns well...so its no big deal. I've heard this flowerpot approach before - just a normal plastic flowerpot with plenty of holes in the top ? What size hole do you cut ? 10inch diameter ? |
#6
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Installing recessed lighting in a Celotex insulated flat roof
SteveRoche wrote:
I have loads of 50W LV's for general lighting in my ceilings. Some are near celotex. The rest are near rockwool. Proividd you leave a few inches around the,m and make sure they are not near combustble material (right alonsgide joists) and ensure that no combustile materail *thatch, birds nets etc) can drop onto them, they are fine. The best solution I heard here was put an inverted flowerpot over the top Lets face it they have PVC covered wire feeding them, and that burns well...so its no big deal. I've heard this flowerpot approach before - just a normal plastic flowerpot with plenty of holes in the top ? What size hole do you cut ? 10inch diameter ? Ceramic flowerpot. With the hole it comes with. |
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What size would you recommend?
What about plasterboard? Could you make a plasterboard box. If so how big should it be? |
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