I have had bedroom walls plastered and they have dried black why?

Question

I have moved and my bedroom wall plastered, everything looked fine until this morning. My plaster has dried black instead of usual grey, the builder is saying he does not know why, or how to fix problem.

Answer 1

you might have a water leak. My walls went black when my upstairs water pipe burst

Answer 2

Hi UK builder here, if you had a damp problem as stated how did it dry, it would still be wet, mould spores float around and settle and multiply, this would be patchy first. A leak or water penetration would have been on the wall before and your plasterer would have noticed. Did you see anything?.
This can happen by contaminated water used to mix the plaster. The water as it draws out of the plaster becomes nice and warm the ideal temperature for the mould to feed on the contaminants and as such it covers every area, not patchy or localised. Is it like this?, if so once it dries brush on some bleach with water and seal with PVA, no problem. Good Luck. PS fault finding and rectification on new build, so seen it before.

Answer 3

maybe the guy who done the job has done somthing wrong, you say he doesnt know why this has happend so its obiviously not a common problem, i would make a effort to find out what it is if i was you, i would ask another plasterer for ther opinion, did you notice any problems with the walls before the work was done, if it was damp/mould surley all the walls would not be affected, & im sure you would have noticed this. Good luck.

Answer 4

The condensation its self has no longer something do do with the insulation. a house envelope is created to stay away from moisture from escaping inspite of the truth that the walls to the exterior. that is accomplished by technique of providing a vapor barier, it truly is usually a 6-10mil plastic sheathing, on the "warmth in wintry climate" aspect of the wall in the back of the wall board. With that stated, the condensation you're seeing is meerly from the occupants. it will be confusing to have self belief yet 4 human beings in a house can create everywhere between 20-50 lbs of vapor in a 24 hour era. Now the complicated issue is that vapor turns in to moisture even as it reaches its dew aspect. The dew aspect, besides the undeniable fact that, is often an particularly low temperature it truly is different from region to region. once you're contained in the southeast, it will be a drastically severe and once you're contained in the northwest it will be lots decrease. So taking that recommendations, which means your walls/room temperature could be low. to fix the project, the first issue to attempt can be a dehumidifier, that you already did. the subsequent issue you are able to attempt is to get the room temperature above the dew aspect on your section. If this isn't accessible using convenience subject matters, the subsequent perfect decision is to vent your living house. All venting does is sucks that humid, stale air out even as sucking in clean air from outside and conditioning it to occupant decision.

Answer 5

Sounds to me like you already had a damp problem in the wall which wasn't rectified first , and or inadequate ventilation while the plaster was drying !!

Answer 6

Has it full dried out yet usually takes about 5-7 days.

Answer 7

damp, moisture? get a dehumidifier and make sure all dry and sorted b4 wallpaper or anything else, ur wasting money if u go ahead.

Answer 8

mold?