In message , Huge
writes
On 2016-08-16, wrote:
Hi again,

I want to cut a hole for a new window in my house. It's got fairly
standard cavity walls, built of concrete blocks. Actually the blocks
are somewhat non-standard as they have foam insulation inside them (I
mean inside the actual blocks - not inside the wall's cavity.) The
only masonry-cutting tool I own is a 9" angle grinder. This will cut
concrete blocks no problem, but only to about 3" deep. I suppose could
hire a 300mm grinder for about £28 a day plus the cost of the cutting
disk which I'm guessing won't be at all cheap.

Rotary grinders in general make an insane amount of dust. Is there
any other tool that anyone can recommend? (I'm visualising something
like a very large jig-saw with a diamond blade...)

Thanks for any tips you can offer,

And the answer is ... a chain saw. No, seriously. Fitted with a concrete
cutting blade/chain.

https://www.youtube.com/watch?v=n_CBpJNxdag

Or hire an alligator saw. Still get lots of dust and need two hands.
Scaffold tower?
https://www.machinemart.co.uk/p/dewa...alligator-saw/


--
Tim Lamb