Water collecting on main cold water pipe under kitchen sink

[Neemos]

You noticed the ambient temperature lately?

Lag it and keep an eye on it.

The condensation is back. Will lag it today and keep an eye on it. Cheers.

 

[WaterTight]

Wipe the whole arrangement dry with tissue then put a torch on it and watch. Depending on speed of condensation and/or leak you may need to pop back at regular intervals. If it gets wet in one specific place first and runs down, it's a leak. If the whole affected area gets wet at the same time/rate, it's condensation.

 

[zzzjim]

Wipe the whole arrangement dry with tissue then put a torch on it and watch. Depending on speed of condensation and/or leak you may need to pop back at regular intervals. If it gets wet in one specific place first and runs down, it's a leak. If the whole affected area gets wet at the same time/rate, it's condensation.

Leak hunting with tissue , have twisted kitchen roll strips and tied in simple knot , and left dangling . 1 each end ... ( don't forget to remove ! )

Touch with a dry hand , if get fed up looking .
If cold is in regular use , Cold water is about 15 deg C .

Other thoughts , has water got under sink unit from seal along counter-top or wall , now as things warm up it's attempting to dry out ... Cupboard doors open sounds like a good move.
See if bottom trim is removable for temporary ventilation/checking for big puddle .

 

[Neemos]

Leak hunting with tissue , have twisted kitchen roll strips and tied in simple knot , and left dangling . 1 each end ... ( don't forget to remove ! )

Touch with a dry hand , if get fed up looking .
If cold is in regular use , Cold water is about 15 deg C .

Other thoughts , has water got under sink unit from seal along counter-top or wall , now as things warm up it's attempting to dry out ... Cupboard doors open sounds like a good move.
See if bottom trim is removable for temporary ventilation/checking for big puddle .

The guy from Homeserve (as well as myself) have checked all the usual areas for leaks. They're all fine. Bottom trim is removable and all is dry... Dirty but dry. The only thing left to check is to see if there's a micro hole at the joint.

 

[Neemos]

Hi everyone. I'd like to thank you all for your help. I think I've found the culprit. The downpipe on the exterior wall was blocked and rainwater was running down the wall. Got this unblocked now.... I don't know how a tennis ball got up there??? Anyway the wall can dry now and I'll see if that sorts it out. I'll keep you posted.

 

[Dotty]

Catches you out in all sorts of ways, don't it! Thanks for coming back and telling us how you got on.

 

[Neemos]

Catches you out in all sorts of ways, don't it! Thanks for coming back and telling us how you got on.

It certainly does. Btw do you think the plaster will dry out or will it need to be replaced? It's a very awkward spot to replace.

 

[joni os]

Plaster will dry, but salts brought to surface can become hygroscopic. This could lead some monkey with damp meter to diagnose rising damp. Give wall plenty of time to dry out before decoration.

 

[Neemos]

Thanks for the quick reply. Will do.