Hi, we had a leaking tank, just small dripping over a few weeks, but the
plasterboard ceiling has become yellowed now on the underside. The ceiling
of the room below the leak is painted. We have attempted to hide the yellow
stain by painting over it a number of times, butthe discolouration returns
after a few weeks. Please does anyone have any tips for getting rid of the
problem once an for all?
You should have allowed the ceiling to dry out completely for a couple of
weeks before painting it. You should also have some sort of mould killer
applied to the surface first, then apply a good coat of paint on top of it.
You can use size on the area affected. This kills any mould spores and also
creates a sticky surface to hold the paint. Have a look through your local
DIY store for "Size", which normally comes in a packet like wallpaper paste,
or in a box like polyfilla. But it should say "Anti-Fungicide" on the
Another good cleaner of this type of staining is "Sugar Soap". This too has
an anti-fungicide to help clean any spores off the surface before painting.
But the plaster will still be wet for a long time, so leave it for a couple
weeks, especially in this warm weather, before you clean it and re-paint.
Make a claim on your building insurance policy.
| Hi, we had a leaking tank, just small dripping over a few weeks, but the
| plasterboard ceiling has become yellowed now on the underside. The
| of the room below the leak is painted. We have attempted to hide the
| stain by painting over it a number of times, butthe discolouration returns
| after a few weeks. Please does anyone have any tips for getting rid of
| problem once an for all?
Has same problem in last house, leak from ball valve in loft, ran back down
pipe insulation and dripped into airing cupboard. Leave to dry for ages
(actually quite quick in airing cupboard) and paint with stain blocking
paint (B&Q) then normal emulsion. Works fine.
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