try gettin to your job in st ives in cornwall. in the smallest street system in the world. with about a thousand tourist thinking your vans invisable. then drill a 4 inch hole through solid 2 foot granite then expected to fit 4 floors of heating system. arrrrrrrgh hate mondays.love fridays though
After reading wiggikins' brief response, I fitted it without a sleeve. Now I'm nervous about water down the cavity. Short of subsidence shifting the wall it's got to be very unlikely, hasn't it?
If I forget to drain it one winter and it freezes, the leak is going to be pretty obvious I suppose?
agile, alls i can say it takes alot of patience.most people i know round here tend to take the granite out and build around the flue. but if you have to, it just takes a bit longer than usual. as for the wear on a diamond core drill, try find a cheap TFT bit instead, but to be honest 10mm wont hurt, and would prob find it wont take long also.
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