Water in worktop join?

[Another Dave]

I've just fitted a new kitchen. At my wife's insistence, I got a man in to do the worktop. Where two pieces of worktop join at right angles he made a join using a router and jig. This was the bit my wife didn't trust me to do. However, it's started lifting very slightly as if water has got into the chipboard worktop.

If I get him back in, is there anything he can do?

Is there anything I should/could do?

Have I been doing something wrong - shouldn't the join withstand water?

TIA

[StealthUK]

If it's properly sealed it should withstand water. I normally spread some PVA wood glue acorss the surfaces. Any minor crevices can be filled with a worktop repair filler to stop water sitting. Dependent on the damage and pattern of the worktop you can try and repair the damaged laminate with a filler.

[Ian Stirling]

And if it's swolen, then you can cut out the swolen section of wood with a dremel, leaving the laminate intact. Then fill.