Chasing out a wall

Caporegime
Joined
11 Jul 2009
Posts
27,040
Location
BenefitStreetBirmingham
best way to chase out a tough breezeblock bathroom wall for a shower cable?

cut a channel first with angle grinder/cutting disc or just chisel away with sds drill?
 
I have to go atleast 6 foot along the wall and yh its dusty,gave me a sore throat just chiselling the tiles off

it was in some plastic trunking before but it looks ugly
 
I have to go along near the ceiling and down to the shower,can't drop the ceiling as its a flat

Its safe to do isn't it? Won't weaken the wall? Never done it before
 
I did half of it today,the dust forced me to stop,ill do the rest tomorrow maybe and post some pics

god it was dusty/messy
 
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