dodgy plastering

2020sombre

hi, looking for some advice after having renovation work done, a new bathroom fitted and ceiling below freshly boarded & plastered.
the builders say was an overspill of toilet with caused a slight leak through to the kitchen ceiling (which seemed to be drying see pencil lines)

However a patch still does not seem to dry and they are saying it is the bonding and all they can do as they cannot see or hear leak when running taps - is put stain block on.

What are my options as all work has been paid for 

SaverRate

Can you provide photos?

FreeBear

How long ago was it plastered ?

I've had plastering done, and a few patches took quite a while to dry out. Give it two or three weeks with the heating on (but not too high) and a dehumidifier.

2020sombre

HarryDavies01 said:

Can you provide photos?

FreeBear said:

How long ago was it plastered ?

I've had plastering done, and a few patches took quite a while to dry out. Give it two or three weeks with the heating on (but not too high) and a dehumidifier.

it has been completed around 4 weeks 

SaverRate

Assuming that's pencil lines not cracks, paint over it (white washing first) and if damp appears you still have a leak?

Jeepers_Creepers

Normally you would have expected that to have dried out by now. Surely easily in a week in this warm and dry weather.

They mentioned 'bonding', so that means a thick base layer was applied first, on to - I presume - bare brick/block? That takes longer to dry, certainly, but a month should have seen that all of that 'in the pink' in this perfect weather.

One proviso - there was a leak at one point? In which case the bricks/blocks could well have become nicely damp due to this and taken in a fair bit of water - some bricks are very prone to this. In which case that could be the reason.

You really need to be certain there isn't any continuing leak, tho'.

Can you explain - precisely - what this "overspill of toilet" was, and "they cannot see or hear leak when running tap"?

Toilet? Tap? Which? Why? How? Where?

Once you discount a continuing leak, then it's simply a case of waiting.

I personally wouldn't apply stain block or plaster paint or a mist coat. Not unless it is truly dry.