bedroom damp

[Strima]

If it's really bad the plaster could be soaking, it takes a long time to dry even with a dehumidifier. Make sure there's plenty of ventilation in the room, as pointed out check for leaks, missing insulation etc. Also check the exterior wall so see if the pointing has fallen out or loose, if so this needs sorting ASAP before any other work is done as no doubt the cavity will be damp, it will take months to dry out.

Have they checked the roof lining for damage?

In extreme cases it's better to knock the old plaster off and let the wall/ceiling dry fully, as the mould spores get into the plaster and you'll never shift them.

If it dries quite quickly then I've found H&G mould spray works well, you need the windows open as it has really strong vapours.

 

[MarkieSparkie]

If your investigation reveals no sources external to each room, dry out each room with a dehumidifier, it may take a week or longer depending on the amount of moisture build-up. Meantime treat, remove and kill the black mould with a proprietary mould cleaner (or neat bleach dilluted 4 to 1) and repeat this step cleaning the whole ceiling once the room has dried out to be certain you have killed all the mould spores. In any room that is not a bedroom, particularly the major moisture sources e.g. kitchen and bathroom, the installation of humidistat extractor fans venting to the outside would be a good long term solution. If the problem is severe a fan can be installed in a bedroom, but it's generally undesirable because it may keep the occupant awake at night unless it's timer or sensor controlled to operate in daylight hours only.

 

[Octopus]

Have you been in the loft? I know somebody who had a similar problem and it turned out to be years upon years of build up of mess from a birds nest in the loft space above! Yuk

 

[oldtimer]

TBO if it is the normal centrally heated, double glazed vacuum that most houses are now, i would just leave a window ajar or on trickle vent.

I live in a 1930's house with sash windows that rattle in the wind. Never get condensation or damp problems!

Is that the house you helped your dad to build ?

 

[telectrix]

could be a leaking or overflowing gutter if it's in the corner, on an outside wall.

 

[Des 56]

You probably could do with a Dry air unit mounted in the attic with outlet perhaps on the landing to provide positive ventilation

I had a mate who had terrible trouble trying to remove damp from beside a bay window,all sorts of remedies were tried with the building fabric,none had any effect
I had fitted a few of these for the council(I have one left over somewhere :wink_smile: )I was sceptical about these units because the action is so simple.
After installing this unit he had no problems ever since
Here is a link to a product much the same,
Condensation in loft and roof voids - Dryhomes

 

[RGawley]

You probably could do with a Dry air unit mounted in the attic with outlet perhaps on the landing to provide positive ventilation

Exactly, if the problem still exists after (if) you tried a dehumidifier, the solution is to get yourself a Dry air unit, (Dri-Master can be purchased through Nuaire) basically it sucks in air and goes through filters which takes away the condinsation and then blows clean dry air through house, if you need any help or more infomation on the Dri-master pm me

 

[Darkwood]

If it is a mold growth usually in the corners and down the wall, assuming you are 100% sure its not caused by leak etc then you can try to remove it yourself if it is only surface, but be warned to wear a breathing mask thats rated for fungal spores..... i had this down wall and on ceiling due to now air flow around house (old house new double glazing).. the way i treated it was bucket of soap and water with cup of bleach in it and wipe down the effected area letting it soak in a bit, if the mould isnt too deep then it should kill the mould but the causes need to be identified as mentioned already; lack of air circulation may be a suspect. If its deep into the plaster then possible it will need replastering to be sure you got it.
While this black mould exist it can be dangerous as it causes all sorts of ill effects from wheezing to lung infections.

 

[BroadReach]

If using a portable dehum to do a 1 off drying out of the room, it is a good idea to also use an air circulator fan in the room. This will speed up the process by circulating the dry air from the dehum around the room.

 

[Top Cat]

Is that the house you helped your dad to build ?

Hey you are supposed to be the old timer!

 

[Newsome3]

you one up for sale pal?
would of pm you but cant get through to you

You probably could do with a Dry air unit mounted in the attic with outlet perhaps on the landing to provide positive ventilation

I had a mate who had terrible trouble trying to remove damp from beside a bay window,all sorts of remedies were tried with the building fabric,none had any effect
I had fitted a few of these for the council(I have one left over somewhere :wink_smile: )I was sceptical about these units because the action is so simple.
After installing this unit he had no problems ever since
Here is a link to a product much the same,
Condensation in loft and roof voids - Dryhomes