Bit confuzzled here - I had a sunroom built 2 years ago and everything appeared ok. Last summer I laid a patio down, next to the sunroom and I know it's underneath the damp proof layer, and that the damp proof layer wasn't touched.
I am however getting black mildew on the wall next to the glass door (in full sunlight and the one is regularly open) and the paint is peeling off (we painted about 6 weeks before the paito was laid unfortunatly). The plaster looks ok though. Obviously I need to get this fixed, i wasn't aware how bad this stuff could get until i started reading, a bit worrying as I have a toddler and the sunroom is predominetly her playroom.
I've to chase up the sunroom company (I presume the dpc is ballsed up), but I'd like to know if the patio could have any effect? or was the wall damp and I didn't notice because it wasn't painted.
Would this mean that half the sunroom has to be torn down to reinstall the dpc or is there a more subtle method?
Cheers in advance.
Doubtful the patio would affect it, provided is runs away from the sunroom.
Could be a number of reasons for the damp issue, needs an inspection really.
For now though, get yourself some dettox mould and mildew remover tomorrow from asda. It's really good stuff, got bleach in it so be careful!
The patio runs away at 1" per 6' (Imperial level I think my dad called it), so I'm doubtful too, I was just trying to cover all angles.
Could be the ventilation in the room, missus has been using it a lot for drying clothes - we get quite a bit of condensation and thinking about it an air brick was covered over in it's construction.
That's probably it then. The area next to the door would likely be the coldest too, promoting condensation.
Try cleaning it up and ventilating it. Maybe using a dehumidifier when drying clothes.
Could also try that foam wallpaper backing to reduce the condensation further
Would expect this is down to high humidity.
Found something similar in a bedroom myself after checking the loft (fearing the worst) turns out it is broken seal on the double glazing.
Fixed that and got a dehumidifier, which aren’t cheap!
If the paint is peeling but the plaster looks ok its almost certainly due to condensation from the clothes drying.
Had the same in my boys room this winter, which, due to the configuration of our house receives all the hot moist air from downstairs where our clothes are dried.
He had some brightly coloured bathroom paint on his walls that we had left from some previous decoration and it was preventing the walls from breathing.
Stripped back to plaster and re-painted with normal emulsion, and changing how we wash/dry clothes so the air isn't moist every day has solved the problem.
It'll be the ventilation. I get no end of calls about this at work from people who get it in their bathrooms and think it comes from the water. Increase ventilation in the room if drying clothes in there and should solve the problem.
Could be the ventilation in the room, missus has been using it a lot for drying clothes..
This caused a few thousand pounds worth of damage in our old house (we rent it out). Probably our own fault, but we didn't bother with 6 monthly inspections - first time and very naive.
The couple who'd had it were from a warmer climate so had the heating up full blast and dried all their clothes inside (never bothered with the washing line). Also, because they liked the heat, they never left any of the windows open either. Cue very damp walls, rotten floorboards and a new kitchen (floor was so bad that kitchen floor had collapsed under the units). Costly lesson learned.