Waste hole in porcelain tiles ?

[bert large]

I've unwittingly landed a PITA job involving drilling many holes in porcelain tiles.
Anyone know if I can drill a holes for a basin waste through them using a dry diamond core drill please ?
I suspect not but someone may tell me different. Cheers.

 

[SimonG]

Wouldnt fancy that myself. Have a look at the forum sponsor.

 

[SimonG]

365 drills

 

[macackau]

If I have to do that quite a simple trick is to grind out the back of the tile where you are going to drill by a good few mm so you only have to drill a hole through maybe 4mm of tile if that makes sense.

 

[Best]

I suspect it is going to need a flat faced diamond hole cutter and a jig for to guide the hole cutter. So 365 drills would have the cutters

 

[Destroyer2813]

If I have to do that quite a simple trick is to grind out the back of the tile where you are going to drill by a good few mm so you only have to drill a hole through maybe 4mm of tile if that makes sense.

I do that to but slightly differently grind out all the way through then past the end of where the hole is needed then knock the last bits out with a ball ended hammer

 

[thereisawizza]

Yup, Porsadrill will go through ANYTHING! Need slightly deep pockets now, I put £40 on all bathrooms for drill bits nowadays....

 

[bert large]

Thanks for all the replies.
The shower room has already been tiled by someone else so in view of the likely cost to be incurred on special drills, which I doubt I'd get back, I think I'll throw it back to the tiler & say I'll fit the waste if he drills the hole for it.
I normally state on the estimate that I won't work with porcelain wall tiles but forgot to do so on this occasion. I accept they're needed for floors but can't see the need for them on walls.

 

[WaterTight]

how do you recognise porcelain tiles as distinct from normal tiles?

 

[bert large]

how do you recognise porcelain tiles as distinct from normal tiles?

Try drilling them WT. You'll know then.

 

[oz-plumber]

For me, it's come to a point where I assume every tile is going to be a porcelain tile.

Now I make an allowance on all jobs for drill bits and time taken to drill holes.