Positive input ventilation

[coppice cutter]

30 minutes ago, Conner said:

The problem we have is mold along the window wall in the bedrooms.

Start by going back to basics.

 

Mould is caused by moisture in the air hitting a cold surface.

 

So firstly is their excessive moisture in the air and/or is that a particularly cold surface?

 

Secondly as Andy says is there an issue with that wall that the damp is getting in to it from elsewhere and not actually related to the conditions in the house?

 

No point trying to find solutions for a problem until you know what the cause is.

 

*edit* - sorry, just seen your reply as I was typing this and indeed you seem to be going about things the right way. 👍

 

 

Edited January 25, 2023 by coppice cutter

[GarethM]

Or as a stop gap until it warms up buy a dehumidifier, sticking plaster solution but removes moisture and adds a small amount of heat.

 

A hygrometer on the wall also helps, cooking and showers do add a good 20% to a house.

 

Maybe get a cheap thermal plugin for your phone to see cold bridging.

Edited January 25, 2023 by GarethM

[Muddy42]

 

[Muddy42]

I thought the above video explained the issue quite well.  Clearly having good extraction will help where you have sources of moisture (showering, washing machine and cooking). Otherwise if you have an old home, a good blast of heat in the evenings helps, easier if you have a stove and free wood.

[GarethM]

I've not watched the link but this came to mind.

 

 

 

[Conner]

Well gents I may have found the cause. Been up in the loft. Very shallow roof. Although the new insolation was touching the felt under the tiles there is a gap between the wall and insulation exposing the plaster board. So no insulation over the area with mould cold ceiling air condensing leaving moisture. 
lazy installation of insulation as it is a crawl on ya belly to tuck it right in. 
thanks for the help guys il let you know if this is the cause.

if I stop itching 😂😂

[coppice cutter]

1 hour ago, GarethM said:

I've not watched the link but this came to mind.

 

 

 

Well you know, pronunciation is important.

 

A seen an ad recently where someone was selling a condescending boiler.

 

Now if they'd known how to pronounce condense and it's derivatives properly...............................!

[GarethM]

Yeah, but most heating adverts are condescending 🙂.

 

They seem to say buy this boiler and you'll have this perfect home/wife and kids, whilst the reality is you'll be sat in the dark wondering how to pay off the new boiler and afford your next own brand pot noodle!.

[teepeeat]

4 hours ago, Conner said:

Well gents I may have found the cause. Been up in the loft. Very shallow roof. Although the new insolation was touching the felt under the tiles there is a gap between the wall and insulation exposing the plaster board. So no insulation over the area with mould cold ceiling air condensing leaving moisture. 
lazy installation of insulation as it is a crawl on ya belly to tuck it right in. 
thanks for the help guys il let you know if this is the cause.

if I stop itching 😂😂

good luck with the itching 🙂

Clearly found a cause for your issues, but always useful to minimise sources of moisture in the house as well.

Surprising one to me was how much water remained in the items in the washer even if the cycle included a spin at the end. Our washer has a dedicated 8 minute spin cycle which removes significant amounts of water after the wash cycle. Did some tests with a condensing dryer and there was at least a third less water in the tank after running the dedicated spin cycle with similar wash loads.

 

As for the PIV - only difference to opening a window is that the loft air might be slightly warmer due to heat leakage from the house - oh and the cost of the unit and installation and disruption due to installation of ducting 🙂

 

 

[GarethM]

Washing machine wise, I always pay extra for 1600rpm spin as a 1200 is barely even worth having when the clothes come out wetter than a fish.