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Old 07.04.2015, 22:34
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Papa Goose Papa Goose is offline
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Re: Ceiling light and installer recommendations?

Butterfly fixing are designed to bite into the nylon ceiling boss in a concrete ceiling or the wooden boss in an older ceiling as these are fixed and therefore secure, and not suitable for hollow board or placo. From the picture you can't tell ceiling construction, but if it is the cable gang that is exposed, it is likely to be 20mm and the minimum diameter for butterflies is normally 28mm. If it is the gang showing, then that is likely to small for butterflies, and gang is normally NOT a secure thing to attach anything to. So whilst handy things, butterflies aren't always a solution.

Mitz, don't over stress on the odd small hole around a light fitting, whilst tough the Swiss do expect that some holes will be made.... just not loads and not looking like you used a bazooka.
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Last edited by Papa Goose; 08.04.2015 at 13:57.
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