Black Mould

Emmia

MouldyOldDough said:

Emmia said:

MouldyOldDough said:

Our dehumidifier meter reckons that our house humiity averages 65% - does that sound acceptible ?

65% sounds a little high, ours is about 50% these days - when it was 65% we had a bit of a mould problem.

OK How do we reduce it to more reasonable levels ?

If we leave the dehumidifier on for 24 hours - and get the humidity down - won't the moisture re-enter the house when the fronr door is opened ?

We got the drop when we installed extractor fans with humidstats in our windowless bathrooms, the dehumidifier is good, but needs running a lot (and gets in the way). 

Do you have extractor fans in your bathroom(s)?

Have you identified any obvious sources of day-to-day moisture (showers, cooking, baths, leaky windows etc.).

MouldyOldDough

the_lunatic_is_in_my_head said:

Bleach tends to remove mould on the surface but not get to the roots inside the materials it is growing on, mould cleaners should have additional ingredients that kill it off properly. 

We had a go this morning with CILLIT BANG mould cleaner -  this has got rid of all of the mould on the actual ceiling - but not in the corner - we used a sponge and old paint brush to apply.

It does say on the bottle "works best on non-porous surfaces" - but it has worked a treat on the ceiling !

MouldyOldDough

Emmia said:

MouldyOldDough said:

Emmia said:

MouldyOldDough said:

Our dehumidifier meter reckons that our house humiity averages 65% - does that sound acceptible ?

65% sounds a little high, ours is about 50% these days - when it was 65% we had a bit of a mould problem.

OK How do we reduce it to more reasonable levels ?

If we leave the dehumidifier on for 24 hours - and get the humidity down - won't the moisture re-enter the house when the fronr door is opened ?

We got the drop when we installed extractor fans with humidstats in our windowless bathrooms, the dehumidifier is good, but needs running a lot (and gets in the way). 

Do you have extractor fans in your bathroom(s)?

Have you identified any obvious sources of day-to-day moisture (showers, cooking, baths, leaky windows etc.).

We don't have any extactor fans - but there is an airbrick in the bedroom - I believe that the moisture comes from showering daily

The UPVC double glazed windows are fairly new

Emmia

MouldyOldDough said:

Emmia said:

MouldyOldDough said:

Emmia said:

MouldyOldDough said:

Our dehumidifier meter reckons that our house humiity averages 65% - does that sound acceptible ?

65% sounds a little high, ours is about 50% these days - when it was 65% we had a bit of a mould problem.

OK How do we reduce it to more reasonable levels ?

If we leave the dehumidifier on for 24 hours - and get the humidity down - won't the moisture re-enter the house when the fronr door is opened ?

We got the drop when we installed extractor fans with humidstats in our windowless bathrooms, the dehumidifier is good, but needs running a lot (and gets in the way). 

Do you have extractor fans in your bathroom(s)?

Have you identified any obvious sources of day-to-day moisture (showers, cooking, baths, leaky windows etc.).

We don't have any extactor fans - but there is an airbrick in the bedroom - I believe that the moisture comes from showering daily

The UPVC double glazed windows are fairly new

I'd be looking to get some fitted in your bathrooms (do they have windows you leave open, as that can also help) - since the air brick may not be sufficient to remove the moisture.

MouldyOldDough

Emmia said:

MouldyOldDough said:

Emmia said:

MouldyOldDough said:

Emmia said:

MouldyOldDough said:

Our dehumidifier meter reckons that our house humiity averages 65% - does that sound acceptible ?

65% sounds a little high, ours is about 50% these days - when it was 65% we had a bit of a mould problem.

OK How do we reduce it to more reasonable levels ?

If we leave the dehumidifier on for 24 hours - and get the humidity down - won't the moisture re-enter the house when the fronr door is opened ?

We got the drop when we installed extractor fans with humidstats in our windowless bathrooms, the dehumidifier is good, but needs running a lot (and gets in the way). 

Do you have extractor fans in your bathroom(s)?

Have you identified any obvious sources of day-to-day moisture (showers, cooking, baths, leaky windows etc.).

We don't have any extactor fans - but there is an airbrick in the bedroom - I believe that the moisture comes from showering daily

The UPVC double glazed windows are fairly new

I'd be looking to get some fitted in your bathrooms (do they have windows you leave open, as that can also help) - since the air brick may not be sufficient to remove the moisture.

We were thinking of getting one of those heat exchanger ones - to retain warmth in the house - do they really work ?

Emmia

MouldyOldDough said:

Emmia said:

MouldyOldDough said:

Emmia said:

MouldyOldDough said:

Emmia said:

MouldyOldDough said:

Our dehumidifier meter reckons that our house humiity averages 65% - does that sound acceptible ?

65% sounds a little high, ours is about 50% these days - when it was 65% we had a bit of a mould problem.

OK How do we reduce it to more reasonable levels ?

If we leave the dehumidifier on for 24 hours - and get the humidity down - won't the moisture re-enter the house when the fronr door is opened ?

We got the drop when we installed extractor fans with humidstats in our windowless bathrooms, the dehumidifier is good, but needs running a lot (and gets in the way). 

Do you have extractor fans in your bathroom(s)?

Have you identified any obvious sources of day-to-day moisture (showers, cooking, baths, leaky windows etc.).

We don't have any extactor fans - but there is an airbrick in the bedroom - I believe that the moisture comes from showering daily

The UPVC double glazed windows are fairly new

I'd be looking to get some fitted in your bathrooms (do they have windows you leave open, as that can also help) - since the air brick may not be sufficient to remove the moisture.

We were thinking of getting one of those heat exchanger ones - to retain warmth in the house - do they really work ?

I've no experience with those, all I'll say is that a fan with timer and humidstat has worked wonders to reduce the humidity levels - I've also not noticed any draught issues...

Tip: buy a quiet one (low db)  though, as they come on and extract at a low level whenever humidity goes over a certain point... even if that point is at 3am

Edit: we have these, or something very similar (warning, not super cheap)

https://www.screwfix.com/p/vent-axia-479089-100mm-axial-bathroom-extractor-fan-with-humidistat-timer-white-240v/870gy

MouldyOldDough

Emmia said:

MouldyOldDough said:

Emmia said:

MouldyOldDough said:

Emmia said:

MouldyOldDough said:

Emmia said:

MouldyOldDough said:

Our dehumidifier meter reckons that our house humiity averages 65% - does that sound acceptible ?

65% sounds a little high, ours is about 50% these days - when it was 65% we had a bit of a mould problem.

OK How do we reduce it to more reasonable levels ?

If we leave the dehumidifier on for 24 hours - and get the humidity down - won't the moisture re-enter the house when the fronr door is opened ?

We got the drop when we installed extractor fans with humidstats in our windowless bathrooms, the dehumidifier is good, but needs running a lot (and gets in the way). 

Do you have extractor fans in your bathroom(s)?

Have you identified any obvious sources of day-to-day moisture (showers, cooking, baths, leaky windows etc.).

We don't have any extactor fans - but there is an airbrick in the bedroom - I believe that the moisture comes from showering daily

The UPVC double glazed windows are fairly new

I'd be looking to get some fitted in your bathrooms (do they have windows you leave open, as that can also help) - since the air brick may not be sufficient to remove the moisture.

We were thinking of getting one of those heat exchanger ones - to retain warmth in the house - do they really work ?

I've no experience with those, all I'll say is that a fan with timer and humidstat has worked wonders to reduce the humidity levels - I've also not noticed any draught issues...

Tip: buy a quiet one (low db)  though, as they come on and extract at a low level whenever humidity goes over a certain point... even if that point is at 3am

Edit: we have these, or something very similar (warning, not super cheap)

https://www.screwfix.com/p/vent-axia-479089-100mm-axial-bathroom-extractor-fan-with-humidistat-timer-white-240v/870gy

Hmmm 7.5 Watts - would that be safe powered by the lighting circuit? 

We have no electricity near the bathroom 

Grenage

Hmmm 7.5 Watts - would that be safe powered by the lighting circuit? 

We have no electricity near the bathroom 

People normally run extractors off lighting for the same reason.  With LED lighting the circuits are under even less load.

Emmia

Grenage said:

Hmmm 7.5 Watts - would that be safe powered by the lighting circuit? 

We have no electricity near the bathroom 

People normally run extractors off lighting for the same reason.  With LED lighting the circuits are under even less load.

Ours comes on with the lights, but has a separate switch so lights could be used without the fan.

Phil4432

grumbler said:

Phil4432 said:

...condensation; which occurs at 14C.

Is it a fact?

Its a rough guide, also depends on humidity.  The advise I read is to keep the house at 18C minimum, I keep mine at 14C because I'm stingy.