Supporting a sink with two bowls (1.5) ?

[Spinny]

Our stainless steel sink is currently supported at each end only. I notice it is sagging at the divider between the main bowl and side bowl under it's own weight. Doesn't seem good.

Should such sinks be supported underneath between the two bowls ? (We will not be having the worktop over the divider)

[Mr Punter]

A photo would be useful.  Mostly sinks are supported all round, either by kitchen unit carcase or by worktop.

[Spinny]

Photo.

It is Franke brand. I don't find it too impressive that they manufacture a sink that deforms under it's own weight when supported at the ends TBH.

[crispy_wafer]

when sat into a worktop and supported on all 4 edges it'll be fine.

[Nestor]

This is an undermount sink, worktop above ?

I fitted a couple of timber horizontals to support the long sides as was fitting a concrete worktop.

[Spinny]

Yes, undermount sink, quartz going on top.

I notice the sink has a couple of bracing pieces attached across the bowls at the side, but still sags under it's own weight.

 

I think the fitter's idea was it could be adjusted forward/backwards as necessary., but fill the bowls with water and what would happen ?

[Nickfromwales]

36 minutes ago, Spinny said:

Yes, undermount sink, quartz going on top.

I notice the sink has a couple of bracing pieces attached across the bowls at the side, but still sags under it's own weight.

 

I think the fitter's idea was it could be adjusted forward/backwards as necessary., but fill the bowls with water and what would happen ?

Your quartz fitters should be pre-aligned to walk through this ‘issue’?  

 

They make small cuts in the underside of the quartz to accept stainless L section ‘tabs’. These are done and then the quartz cleaned, dusted and decontaminated. 
 

Then clear CT1 (NOT SILICONE) is applied to the mating surfaces of the stainless sink, where it marries up with the underside of the quartz. This should be with the quartz upside down and the sink sat on top. 
 

Once aligned the quartz fitters should be making up a mix of 2-part resin bond to set the tabs into the slots, maybe 6 or 8 of them for your sink. This takes no longer than 15-20 mins to cure fully, and then you’ll need a stick of Semtex to get that bowl back off.

 

Very standard stuff, shocking that they’ve not explained this process to you comprehensively….

[Spinny]

Wow, Thanks Nick.

They did say the sink will be adhered/sealed to the underside of the worktop, but no mention of any tabs, or doing this with the quartz upside down.

We are looking to have both the kitchen sink and the utility sink with no overhang at the edges because both will have accessories that fit over the sink. So the join line between worktop and sink will be visible and need to be very tidily finished and sealed with an appropriate colour of sealant/adhesive.

 

Templating has been delayed until mid July as they insist the kitchen is fully finished with it's missing pieces first. Especially as our quartz colour was discontinued 18 months ago and they found some of the last slabs at a place in Scotland for us back then. So any cock-ups on the cutting and the whole job will be screwed. Happy with that as a temporary panel fitted by the kitchen people has already been knocked out of place slightly by the sparky.

 

Come on England ⚽

[ProDave]

Make sure the sink is there when they come to template the worktops.  If I recall correctly, they took the sink with them to engineer the fittings, and of course brought it back again when they came to fit the worktops.  They also had sight of the tap, that in our case had to be mounted in the worktop with the tap position aligned with the joint between full bowl and half bowl.

 

They do this all the time, they should know what they are doing.