"RedOnRed" wrote in message
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"Mark Downey" wrote in message
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while ripping down my ceiling for my kitchen extension to do a bit of
electrical work i have discovered that there is no insulation in the
roof.What is the best optiion for this - how thick do i need it and what
is the best to use bearing in mind that i am putting up spots

Loft insulation should be about 250mm.

No. As thick as you can get it.