Hi Michael. I am assuming you are having laminate worktops fitted and hence your concern, (granite, quartz, corrian etc would not pose a problem).
There are two things to bear in mind with laminate, it is bolted together so you will need to leave room for the bolts - around 100mm.
Secondly, even with the joint fully sealed with Colourfill there is still a good possibility that it will 'blow' over time if it is constantly wet.
Hope this helps, Karl
I always advise a metal butt joint but that is mainly in rentals
If you have a water tight perfect joint colorfilled and protected you can 30mm is my personal max
try hunting round for a slimmer sink maybe 1 bowl as opposed bowl and a half
Im assuming this is on corner sink being the first unit and then returning on a longer run
If your on a right angle which I'm assuming you possibly are run the joint parallel with the front of the sink instead of along side of it, a work top join will often land near a sink and thats not a big problem. But try and ensure the joint is away instead of next to the sink if that's at all possible.
Hope this helps out a little bit
South Coast Building Ltd
Try keep the joint away from sink far as it can go because any weakness in the joint or any sligth gap water will find a way of swelling the joint no matter how much work top seal u put in
Regards Howard @ reeves electricals and installations
If possible I always try to keep joints away from the sink but sometimes its unavoidable .We have high quality sealing compounds these days so if required it can be as close as 100mm which leaves enough space for the worktop bolts.
Some would say its not ideal where it can constantly get wet, as the joint needs to have mitre compound to seal it. If its done poorly it will fail.
But I would say plan the joint as best you can. If it is something you cant plan out make just sure the mitre compound / glue is spot on and the bolts 3 of them are snug. Check the worktop is level over the joint as well with a straight edge.
Glue the mitre as you would, then tightening! do the bolts middle first! back then front bit at a time, use a ratchet spanner. Then go over the joint. With compound Should be fine.
Just incase you are using mitre strips they can go anywhere
Try and get the sink bowl far enough from the worktop joint that it will not be getting wet regularly. No matter how well a butt and scribe joint is done in a laminated worktop, it will blow eventually if it gets wet.
If your layout dictates that your joint must be near the sink bowl you could consider using a solid surface worktop. We supply and fit Bushboard Encore fairly regularly. (there are many other types too) The joints are sealed with a two part adhesive and then it is sanded down. Done properly the joints are almost invisible andwaterproof.
This will be more expensive than a laminated top but cheaper in the long run.