Damp Stain On Ceiling!

evokit

emulsion doesnt stick to oil based paints and a pot of gloss in 7-8 quid plus anyhow - this is the same cost but for less product yet its overpaintable.
Just go into a random paint shop and ask someone - also says this on most tins
this is why it recommended you should always paint your wood work last after the walls

phill99

You do not need special anti damp paint. It's a con, just like 'kitchen and bathroom' paint. I run a property maintenance company and we never use anti damp paint. Just use an oil based undercoat, it's exactly the same product and you CAN overpaint it with emulsion.

jcb208

it looks like the tape has blown.It will need cutting out and replaced then jointed,then you can seal the stained area with undercoat leave for 24 hrs then paint over with emulsion

googler

If the plumbing gets fixed, and the OP dries out the plasterwork properly.....

why would she need anti-damp or damp seal paint? It won't be damp anymore

Speaking from personal experience, a slow tap leak from the bath left me with a similar situation in the lounge. Fixed the tap, left a couple of fan heaters blowing up at the ceiling for a couple of days or so, then emulsioned it.

I've had no stains showing through, and haven't felt the need for any special paint.....

ian103

we used screwfix spray stain block on our bathroom ceiling. very smelly, two coats and then overpaint with emulsion, just noticed though were i didn't use the stain block, the stain is just about coming through again, it lasted 4-5 months with no stain block

googler

ian103 wrote: »

we used screwfix spray stain block on our bathroom ceiling. very smelly, two coats and then overpaint with emulsion, just noticed though were i didn't use the stain block, the stain is just about coming through again, it lasted 4-5 months with no stain block

Your situation must be different from the OP's unless it's your water tank that's leaking onto the bathroom ceiling, or you have another bathroom above it....

Are you sure you're not getting staining from condensation within the room?

katejo

googler wrote: »

If the plumbing gets fixed, and the OP dries out the plasterwork properly.....

why would she need anti-damp or damp seal paint? It won't be damp anymore

Speaking from personal experience, a slow tap leak from the bath left me with a similar situation in the lounge. Fixed the tap, left a couple of fan heaters blowing up at the ceiling for a couple of days or so, then emulsioned it.

I've had no stains showing through, and haven't felt the need for any special paint.....

I have had a stain on my previous bathroom ceilng and a current bedroom ceiling. In both cases the cause had been dealt with but both needed a stain block. In the first case I had repainted twice with emulsion but the stain showed through as soon as the paint had dried.

googler

katejo wrote: »

I have had a stain on my previous bathroom ceilng and a current bedroom ceiling. In both cases the cause had been dealt with but both needed a stain block. In the first case I had repainted twice with emulsion but the stain showed through as soon as the paint had dried.

I may be repeating myself, but - are you sure you dried it out thoroughly?

davethedecorator

There is a difference between stain block and damp seal, they both do what they say on the tin, one blocks stains one stops damp. With damp seal you do exactly that, trap in the damp, moisture by its nature doesn't want to stay put so will spread out beyond where it has been treated so where possible paint it on way beyond the damp area. I personally am a believer in sorting the problem not hiding it. In the case of the original poster once the cause of the problem is sorted the stain needs to be blocked, oil based gloss paint will do fine, 2x coats with a gloss roller for even coverage will do just fine, as has already been said, there will be a difference in colour in the area the stain block (gloss) has been applied. The area treated will be whiter so my advice is to treat the whole ceiling. Once painted with emulsion paint it will take longer to dry between coats than normal as the gloss paint isn't porous. Another alternative assuming the room is only a wc and not subjected to steam then the ceiling can be lined with lining paper and then painted.

katejo

googler wrote: »

I may be repeating myself, but - are you sure you dried it out thoroughly?

Yes. The repainting was not done straight away.