suffered with masses of black thick mould in bedrooms just on the eaves (cured bit of ceiling)
Anonymous user 14/03/2024 - 2.35 PM
Thick black mould on curved arches in all bedrooms its been put down to condensation ..i always air the house and housing authority have cleaned gutters..put vents in wood parts under roof to air the attic..theyve came out to check theres no insulation packed into eaves ,then 2 year later came and filled eaves with insulation which I was advised could get wet off roof and cause other problems , I am now in the process of getting a dry system kind of fan inserted on landing even though the workman thinks its the roof...3 years this has gone on and i'm getting the feeling they dnt want to spend money doing whats really needed , i,ve had a new galley/gulley replaced with lead ,and was advised by one of the first builders that my roof needed stripping back about 6 rows of tiles and replaced ...i know i'm getting spun a load of rubbish and at my wits end as what the problem may be ...it seems every little needless jobs getting done to shut me up ..can anyone help explaining what could be wrong please
Are you a tradesperson and able to answer this question?
I have seen this issue many times, if your rooms have the eaves cut out of the top corners it is a lack of insulation ....Your loft will be insulated right into the eaves but if your eaves drop down into the rooms below the ceilings just on that section will be cold spots.
The answer is either eave ventilation or you can get spray foam insulation to spray down the eaves from up in the loft.
You can find that you get this sort of problem when air vents have been blocked up, new double glazing has been installed without trickle vents and retrospective cavity wall insulation has been installed incorrectly.
Also if you have a cavity wall then debris in the cavity can cause this problem.
Ventilation is key to solving this along with making sure the original mould is correctly removed so it doesn't return.
In cases where I have seen this before and no real problem could be found the only solution was to dry line the external walls of the room with foam backed plasterboard and then re skimmed. This provided a permanent fix as the wall was no longer cold to touch and the condensation no longer formed on them. This would mean in your case also foam back plaster boarding the curves on the ceiling of which can be a bit tricky.
Answered24 January 2015
2
Anonymous user
This black mould is a common problem in at least 70% of homes in the UK. In order to prevent this black unsightly mould from appearing you should have good ventilation in each room. All new double glazing will come with trickle vents, in some cases this will not be enough if the original window was far to small for the room size and therefore can not be enlarged. Secondary ventilation should be considered. There should be a balance in temperature too, a sudden drop in temperature could trigger the onset of mould if a warming temperatures has not been reached in regards to balance out the moist air. You could always add a dry walling system to the inside of each room on all external walls, not only would this give you warmth it will hold back any further development of black mould. The walling can be finished in the usual way to give a nice finish.
Piv system on the landing will cure about 90% of your condensation problems.
working mechanical vents exhausting outside in the kitchen and bathroom are a must too.
