FAO Zampa & other pros, URGENT

[kilo_4que]

guys last night I burst a water pipe on my first floor and I managed to stop it in a matter of a minute or so. however this morning I've realised that on my ground floor ceiling i.e dryline the water has shown through, you know damp lines. now what shall I do here. do you think these parts would stain and if so what shall I do to rectify. there is no water leaking now but the damp lines need dealing with.

bare in mind I had finished my 2nd coat of paint just a few days ago and had my top coat left

thanks

 

[vik2001]

the burst water pipe would have caused staining, and you just painted the ceilings, and this may have caused a further reaction hence causing the stains.
you have to remember your ceilings have got wet, n they are plasterboard. depending on how wet they got they may need some time to fully dry out on its own, then repaint.
if they were water damaged extensivly they will be soft and can easily break and crack, in which they would need replacing, but thats they worst case scenario. you should have nothing 2 worry about as you said u stopped the water quick.

when it comes to repainting, let it dry out and use a thick paint to go over them with. not sure but unibonding may strenghten the ceilings, but others may advise against this.

 

[kilo_4que]

hi vik thanks for your reply.

The paint has fully dried, i painted the second coat approx a week ago and yes your right the water was stopped quickly and to also add the hole was luckily not too big hence the amount of water leaking was less than it would have been. The staining has not come through however the damp lines have come through which im sure will stain up later,

would it be advised to lightly heat gun to dry up as much as possible or shall i leave to dry. Likewise how long do you think it could take for me to savely start painting

finally would i need to repaint the whole ceiling or just the part that has been affected

thanks

 

[Robbie uk]

Use either i proprietry stain block in an aresol or use white oil based undercoat to seal the satins. Once dry this can be over painted with emulsion. The oil based undercoat will seal the satin where as emulsion on its own will activate it and it will still come through.

 

[kilo_4que]

btw im assuming you meant stain rather than satin?

Regarding undercoat, i used some water based primer/undercoat on another stain and so far it looks decent. I applied this approx a month ago, so far not noticed the stain come through again.

 

[Robbie uk]

Yeah i did mean stain block, it comes in an areosol and is white when sparyed on. this will kill the stain. Oil based undercoat will do the same but is cheaper. water besed paints generally activate the water stain and no matter how much you put on will keep coming thru. Dont know why yours didnt show through again.

 

[kilo_4que]

There is one thing with my undercoat however. When I paint over the rest of the ceiling with emulsion, it takes ages for those patches to dry. btw do you think I would need to paint the whole ceiling again or just the bits that were effected. Furthermore how long do you think i need to wait before I could start treating it

Finally, can you recommend me a particular undercoat to use or would any oil based undercoat do the job?

 

[Robbie uk]

Any oilbased undercoat will do. Thin it a little to ease it going on so you dont have a thick blob of paint on the ceiling. When it is dry, probabaly the next day it can be painted with the emulsion. The stain must have dried out in the first place though. You might get away with just emulsioning the areas where you have sealed. It will always take longer for those areas to dry because the undecoat wont let the emulsion pentrate as it normally would but will always dry out.

 

[kilo_4que]

How long do you think it would take for water to dry out in such a situation. Personally I was thinking it would take weeks until I could touch it, or am i being over pessimistic

 

[Robbie uk]

Depends how wet the ceiling was. Certainly a few days. You could use a fan heater directed at the stain to help dry it out. if the room is warm or the central heating is on it will be much quicker.

 

[kilo_4que]

nup no heating at all, i only have a heat gun but i htink that may be a little too over the top