Mould on ceiling

[NewhouseOldhouse]

Hi

Any advice how to treat this?

I have tried the special paint, installed a inline extractor fan with no joy.

I was thinking of ripping ceiling down an putting on insulated plasterboard as in 50mm insulation with 12.5mm plasterboard, would that help?

I know up in the loft the insulation is very speratic and no more than 100mm.

Any advice appreciated

Thanks

 

[Murdochcat]

How much air flow is there under the door?

 

[NewhouseOldhouse]

How much air flow is there under the door?

About an inch or so but door is only closed when someone is in en suite

 

[Murdochcat]

what type of fan is in the loft and how long is the over run timer set for?

 

[NewhouseOldhouse]

what type of fan is in the loft and how long is the over run timer set for?

This is the fan

https://amzn.eu/d/be1c0LX

And it's not on a timer just comes on when light is switched on and off

 

[Murdochcat]

This is the fan

https://amzn.eu/d/be1c0LX

And it's not on a timer just comes on when light is switched on and off

That's your main problem then. You need the fan to run on for 10 - 15 minutes after the light goes off to ensure the maximum airflow through the bathroom. This is especially relevant in shower rooms

 

[NewhouseOldhouse]

That's your main problem then. You need the fan to run on for 10 - 15 minutes after the light goes off to ensure the maximum airflow through the bathroom. This is especially relevant in shower rooms

Ok.

The fan has old wiring circuit no natural to allow the timer, can this be sorted?

 

[Odds]

Definitely replace that mouldy old ceiling and think about a ceiling extractor when you re-plaster.

 

[NewhouseOldhouse]

Definitely replace that mouldy old ceiling and think about a ceiling extractor when you re-plaster.

Can I not just use the fan I have in the picture?

 

[Odds]

Can I not just use the fan I have in the picture?

yeah, my bad - i was going to add "a larger fan" but was called afk. It doesn't seem your current fan is doing good job.

 

[Murdochcat]

Ok.

The fan has old wiring circuit no natural to allow the timer, can this be sorted?

Probably. Get a local spark to look