Cutting a composite worktop?
Discussion
Bought a worktop for a basin in the bathroom and took the basin to the shop for them to use as a template, plumber says the hole for the waste isn't big enough as it hasn't accounted for the nut to go around the thread.
Worktop company are being awkward, the hole should be 80mm but is 36mm, how difficult is this to cut, it doesn't have to be pretty as the sink is 420 in diameter?
Worktop company are being awkward, the hole should be 80mm but is 36mm, how difficult is this to cut, it doesn't have to be pretty as the sink is 420 in diameter?
I think 38mm is a standard thickness.
Anyway, to open out the waste hole, you need to plug the existing hole with something to provide a pilot for a hole saw.
First, a bit of 100x18mm timber - 200mm long screwed across the hole on the underside. To make the plug, I'd cut a bit of 2x2 to the thickness of the worktop & cut the corners off to fit. Couple of screws either side in the gap though to the flat on the underside & you're good to go.
Anyway, to open out the waste hole, you need to plug the existing hole with something to provide a pilot for a hole saw.
First, a bit of 100x18mm timber - 200mm long screwed across the hole on the underside. To make the plug, I'd cut a bit of 2x2 to the thickness of the worktop & cut the corners off to fit. Couple of screws either side in the gap though to the flat on the underside & you're good to go.
You need one of these 
Get a piece of wood about 18 Mm thick ,cut a hole through that.
Then Clamp that to the Quartz wherever you want the hole.
With the wood as a guide cut through at a slow speed ideally wet.
If you can't do wet then just take a few goes at it letting the Quartz cool down each time so it doesn't crack.
But if my fitters had done the incorrect hole size they would be going back to do it properly free of charge.
Get a piece of wood about 18 Mm thick ,cut a hole through that.
Then Clamp that to the Quartz wherever you want the hole.
With the wood as a guide cut through at a slow speed ideally wet.
If you can't do wet then just take a few goes at it letting the Quartz cool down each time so it doesn't crack.
But if my fitters had done the incorrect hole size they would be going back to do it properly free of charge.
gfunk said:
You need one of these
Get a piece of wood about 18 Mm thick ,cut a hole through that.
Then Clamp that to the Quartz wherever you want the hole.
With the wood as a guide cut through at a slow speed ideally wet.
If you can't do wet then just take a few goes at it letting the Quartz cool down each time so it doesn't crack.
But if my fitters had done the incorrect hole size they would be going back to do it properly free of charge.
^^^ All of this, but just to add. Make a wall of masking tape around the top too and a large bowl or bucket in the unit. Get a large bottle of water and drill a small hole in the lid and get someone to continuously pour water on the drill bit.Get a piece of wood about 18 Mm thick ,cut a hole through that.
Then Clamp that to the Quartz wherever you want the hole.
With the wood as a guide cut through at a slow speed ideally wet.
If you can't do wet then just take a few goes at it letting the Quartz cool down each time so it doesn't crack.
But if my fitters had done the incorrect hole size they would be going back to do it properly free of charge.
Tell the wife it's finished and get her to clean up the mess. Jobs a good'n
Tbf those are core drills; same idea and theyd work, probably, but you need a heavy duty drill and it'd be the equivalent of ballet dancing wearing snow shoes. A diamond grit holesaw is better suited to more prescision tasks, has a thinner wall requiring less torque and can be used in a decent hand drill
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