I have a sink to fit in a laminate worktop over a 1000 x 600 cabinet. Its a= 1.5 bowl and drainer, total external dimension 1000 x 530 mm. The sink has= a flat steel "designer" flange all around which includes the tap hole and = is about 60mm wide along the front and back (only about 25mm around the sid= es). The fixing lugs are set 15mm in from the edge. The lugs take nylon/met= al claw type clips that hook onto the lugs and tighten against the undersid= e of the worktop.
Now, the obvious way to fit the sink is to form a single large cutout 974 x= 504mm (4mm to allow tolerance and space for the metal clip to fit on the l= ugs). However next to the sink is a gap for a washing machine which leaves = very little supported laminate along the edge of the sink.
So my general plan is now to cut out as little of the laminate as possible. I'll do a main cutout for the bowls. Along the front and back with the larg= e flange, I'll only cut where I need to (i.e. slots for the fixings lugs an= d clips, and a hole for the tap. This will also give a lot more sealant con= tact area and better support for the bowls. It will also help to constrain = the fixing clips which have been known to slip off, I'm led to believe.
For the drainer, which has a depth of between 10mm and 20mm, I'll just rout= e out as much depth of the worktop as required to allow clearance. Since th= e drainer is on the washing machine side, this will provide a lot more soli= d material where it is needed, and make the metal "ring" less with water dr= opping onto it.=20
The only flaw in all this is that there will be a lot more surface area of = naked chipboard to get wet if the sealant around the edge were to fail. I p= lan to waterproof this with plenty of varnish / oil-based paint etc.
Question: Is all this trouble worth it, or should I just cut the big hole a= nd have the thing only supported on 15mm all around the edge ?=20
At the very least, I think I'll need to avoid cutting right through under p= art of the drainer to give more solidity next to the washing machine.
Simon.