Insulated lining paper mold.

[DIY67]

How much is it reading?


Rubbish.

It's not rubbish. The outside humidity has a huge effect on the inside of the house. My meters always run high inside when humid high outdoors.

That aside, the humidity reads around 70-80% in the room on average without the dehumidifier. When on it gets it to the mid 50s-lower 60s. Of course this wouldn't be sustainable running constantly although you can set the humidity threshold. This wasn't a problem last winter with mould so why now ? It seems to be growing quite fast creeping towards the ceiling. As well as behind the books etc on the shelf. I also have a Levoit air purifier running all night so plenty of airflow.

I do have some Lidl mold blocker spray I could try.

 

[DIY67]

I get the same problem & lodgers that doesn't help drying clothes in there rooms. I am trying some paint that has a 5 year guarantee against mould, "we will see" It been on the wall for 18 month & no sign as yet. think it was called zinser permawhite & about £25 per 5lt.

I have looked at that but it's only suitable for wet rooms like Kitchens and bathrooms.

 

[Collectors]

I have looked at that but it's only suitable for wet rooms like Kitchens and bathrooms.

So, i would of thought it was better if it copes with those environments.

 

[DIY67]

I took this when we had a, downpour last week. As you can see it is leaking dead on the corner of the brick holding the cast iron gutter. That might be part of the problem. I could point it myself with my 3 rung ladder but am terrified of working at that height.

 

[JohnD]

Leaking gutters and downpipes will cause damp patches that can be seen by eye on the outside of the house.

... it is leaking dead on the corner of the brick holding the cast iron gutter. ...

Gosh, who could have seen that coming?

 

[robinbanks]

Yes but there is a dehumidifier running which should attract the condensation due to being the coldest point in the room

And you feel that water that has already condensed on a cold wall will suddenly decide to leave the wall (evaporate) and go and condense inside the deh instead, because the deh's coils are colder than the walls?

Where is the energy to evaporate the water clinging to the cold wall going to come from?