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James Stewart[_2_] James Stewart[_2_] is offline
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Default Drilling into old VERY hard concrete - or give up and use "no nails"?


"therustyone" wrote in message
...
On Saturday, April 1, 2006 at 7:12:56 PM UTC+1, Jonathan wrote:
Trying to help a friend with a sprained neck mount a 14" tv on a bracket
in
a 70's flat with internal concrete walls using a standard hammer drill
So, the tv isn't THAT heavy, but the concrete is just not giving! I
drilled
a smaller pilot hole (took 5 minutes to go 1" with a 5mm bit) but when it
came to the 8mm bit, really nothing was happening. I gave up after about
15
minutes and 3mm having gone slightly deaf!

Do I: Drive all the way to B&Q and see if there is some super drill bit
for
ridiculously tough concrete (is there?) , OR, use a good splurge of "no
nails" to glue a square of wood into the wall, and then drill into that?

Only problem with that would be how she removes said square of wood when
bracket isn't needed or when she moves out and the landlord comes to not
paying the deposit...


ram a small charge of dynamite into the hole and detonate. This will
conveniently open it out for further action, like the tunnel borers
technique.


never trust glue .....go for mechanical fixing every time ......