Passing cables through cavity wall

[NozSpark]

Personally I drill a smaller hole (16mm) and knock through some 16mm oval on a slightly downward angle and seal it with silicone..

 

[ianmacd]

Agree with the "pilot" hole first but also maybe less than 10mm. Also as you think you are getting to the "outside", drop the hammer off. I have a cordless sds that I use for smaller holes (up to about 16mm) and the hammer is not too overpowering on that. If I need a larger hole then I (depending on location etc..) switch to a 110v drill to "finish it off"

Using a dull drill bit will increase the chances of blowing the face off a brick.

Ian.

 

[ianmacd]

cemented at either end to stop moisture getting back in

I would avoid using cement on the inside as decorators hate rubbing it down

Good luck with the assessment.

Ian.

 

[Apache]

I would avoid using cement on the inside as decorators hate rubbing it down Good luck with the assessment.

Ian.

Applaud Smiley

Where do you get the longer drill bits from in smaller diameter? Smallest I have found is 12mm at 600mm and 1000mm.

 

[ianmacd]

Applaud SmileyWhere do you get the longer drill bits from in smaller diameter? Smallest I have found is 12mm at 600mm and 1000mm.

Dewalt do some smaller ones (e.g. this 8mm 600mm long sds+ http://dewalt.co.uk/accessories/productdetails/catno/DT9535/). These are fast cutting and need minimal hammer.

Unfortunately, despite me telling them a year ago about their site being badly broken for the sds+ bits, they have yet to fix it.

Ian.

 

[ianmacd]

http://dewalt.co.uk/accessories/productdetails/catno/DT9518/ 6mm * 460mm

http://dewalt.co.uk/accessories/productdetails/catno/DT9513/ 5.5mm * 460mm

http://dewalt.co.uk/accessories/productdetails/catno/DT9620/ 5mm * 460mm

 

[Apache]

http://dewalt.co.uk/accessories/productdetails/catno/DT9518/ 6mm * 460mmhttp://dewalt.co.uk/accessories/productdetails/catno/DT9513/ 5.5mm * 460mm

http://dewalt.co.uk/accessories/productdetails/catno/DT9620/ 5mm * 460mm

My walls vary between 750 - 850mm thick, made of stone with rubble infill!

 

[ianmacd]

Move . I wouldn't have thought you would "blow" the face on a stone wall so drilling small then going up would not be so necessary.

http://dewalt.co.uk/accessories/productdetails/catno/DT9547/ 10mm * 1000mm

 

[Apache]

Move . I wouldn't have thought you would "blow" the face on a stone wall so drilling small then going up would not be so necessary.

The stone does 'blow' btw!

Thanks for the links - no plans to drill any more hole through me walls but will bear it in mind

(not after severing the sky cable last time )

 

[ianmacd]

Could understand it fracturing along a "fault line" but not blow in the same way a brick can but I guess it depends on water ingress and loads of other factors that may have weakened the stone.