Kitchen work top joining

[wcndave]

I realise I have a few posts about my first (and last) kitchen installation, so thanks again for all your help.

I am joining two pieces and the sink is fairly close to the end of one run.

I realised I have not cut the bolt holes, and now see they will overlap the sink.

Now the bolts themselves will not get in the way, however it means the slots will go to the sink edge, possibly weakening it, or not s problem at all and quite normal?

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[Mar_mite]

Well, your not supposed to have a join right next to the sink, like your picture. Not quite sure of the answer. Hopefully someone will have a solution for you.

 

[wcndave]

It's ten cm away but you could be right. No one said anything mind you and I showed quite a few tradesmen. The architect also drew it under the window.

I kind of think I have no choice and just have to go for it.

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[Mar_mite]

In an ideal world, you would have the joint running the other way. (Perpendicular to the way you have it.) I suppose as long as everything is well sealed might be ok.

 

[wcndave]

It seems a bit odd when you look at it the other way, but mainly with only 4m per piece it just wasn't long enough that way

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[wcndave]

All the revealed chipboard edges are double sealed with pva in that area.

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[wcndave]

I am not saying any one (can't believe the typos here) is wrong, just checking if I'm ok to keep going, our will I have to rip it all out and should start again on the top now...

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[Mar_mite]

What are you using to glue the joint?

 

[mahomo59]

You can get shorter bolts therefore you wouldn't have to go all the way through. You can also get purpose made angle brackets that screw onto the under side and then a bolt connects the two together. No routering for bolts.

 

[Mar_mite]

I think the issue is really that the joint is right next to the sink. I wouldn't be worried about the bolts getting wet, it's water splashing over the joint that's the problem. 100mm is close to a sink.

 

[wcndave]

I am using titebond ii

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[owen]

I would have cut the joint the other way. But you should be ok with it like that, I use colourfil for the glue on joints. You need to make sure you seal all the edges with something decent, I normally sand them down and use a couple of coats of yacht varnish.

 

[Mar_mite]

Titebond or any pva type glue is no good for glueing worktops. Colourfil is the best stuff. If your joints are nice and close, silicone would also work.

 

[wcndave]

I watched quite a bit of Tommy trade secrets which seemed quite decent and a few others and they all used pva...

I sealed all edges with two coats pva and used water resistant chipboard for the nailers.

Might put a bead of silicon art the top edge of join, however it looks like my silicon is multi purpose and better for window frames, plastic and glass....

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[Mar_mite]

Pva is good for sealing the exposed edges. Personally I wouldn't use it for the final glue up. But I'm sure whatever you use will be fine. Good luck with it mate.

 

[Limey Lurker]

I've fitted a few kitchens, and most of the worktops came with a label which stated that PVA was NOT a suitable sealant for them, and silicon sealer should be used. Some (3 or 4) of the jobs were to replace w/tops that had swollen at the joints, and, when examined, had NO silicon on the edges, and no sign of any other sealant.

 

[RobinBHM]

As mentioned, colorfil is the ideal option. Failing that, sealing the cut ends with pva, varnish etc should help make the chipboard waterproof and use silicone for assembly. The problem with silicone is that it is so thick it is hard to tighten the worktop bolts enough to squeeze out the silicone to form a tight joint. Spreading the silicone with a filler knife to a thin even layer helps and of course the chipboard has plenty of small voids.

I dont know if it matters what type of silicone is used, its difficult to find anything other than high modulus silicone from retailers.

 

[wcndave]

Thanks everyone. I put pva all over both surfaces and a bead of colored silicon on the edge and that seemed to work well. There is a hairline joint with a color matched silicon so I think it's ok.

I had to finish this for the plumber to attach pipes to my sink, finish electrics, and learn about airing system, 24 day floor heating break in period, get all electrics and lights connected and try to do this in three languages, two of which u don't speak well, so it was pretty much a good s day as it could be!

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