From my experience nothing grips very well in that stuff, but like many
things there is Breeze block and breeze block. some is quite dense, while
other stuff seems internally to be, indeed mostly breeze!
IE lots of holes.

Brian

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The Sofa of Brian Gaff...

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"Michael Chare" wrote in message
...
Do concrete screws grip properly when inserted into breeze block, or will
I have to use a rawlplug?

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Michael Chare