Back of kitchen sink completely rotted out

Flatulentoldgoat

Can anyone suggest how I go about tackling this? I've just torn off a strip that was covering this. As you can see the chipboard has completely disintegrated. I'd really rather not replace the whole counter top if I can. Ideally I'd just like to lay something like a baton in there which is fastened into the wall. However, I think the gap is too wide for that.

FreeBear

To be frank, there is not a lot you can do with that. I would suspect that the worktop had not been sealed when it was installed, and water had been running down the back. To do a (half decent) repair would require the worktop to be pulled out and any timber inserted, to be properly treated & sealed. The sink would also most likely need to be lifted out and reseated with a generous bead of sealant.

If you wanted a quick fix, some casting resin poured along the back edge would do it. But you'd need to make sure any gaps are plugged first or the resin will just run through them.

Long term, replacement of the worktop is the only viable option - Make sure the back edge is properly sealed (and the cut out for the sink), and a bead of silicone sealant is applied along the edge and around the sink.

DiddyDavies

I would suggest trying this:
ronseal-wet-rot-wood-hardener I can't post a link to it but it's easily found on Google.
Apply liberally then when it has set, cover with a waterproof wood filler. (Depending on the depth, you might need to build this up in layers).
I used it to repair a wooden window sill and it worked perfectly.

Flatulentoldgoat

FreeBear said:

To be frank, there is not a lot you can do with that. I would suspect that the worktop had not been sealed when it was installed, and water had been running down the back. To do a (half decent) repair would require the worktop to be pulled out and any timber inserted, to be properly treated & sealed. The sink would also most likely need to be lifted out and reseated with a generous bead of sealant.

If you wanted a quick fix, some casting resin poured along the back edge would do it. But you'd need to make sure any gaps are plugged first or the resin will just run through them.

Long term, replacement of the worktop is the only viable option - Make sure the back edge is properly sealed (and the cut out for the sink), and a bead of silicone sealant is applied along the edge and around the sink.

Would it be possible to just jugsaw the section the sink drops into and drop in a new section neatly? I presume I'd need to bond the edges somehow.

Grenage

My mother had the same issue (no sealant).  I glued a piece of dark uPVC window trim in place and then sealed it along both edges.