Condensation problem around bedroom window and wall below the window.

This shouldn’t cost you much but will take a while to rectify . 1) purchase a digital thermal hygrometer off the Internet for about £18-20. This will tell you when the humidity gets high. 65% or more is mould territory. 2) when the humidity is high, open a window on opposite sides of the property simultaneously for 20 minutes only then shut . Repeat as necessary. 3) clean off mould with distilled white vinegar. Tip: Do not leave the windows open continuously, this increases condensation.

Hi Hol_Oxo, Condensation build up on a double glazed window is a sign your windows are doing their job. But an excessive build up of water isn’t a good thing, more then likely due to a lack of air flow - hence trickle vents pop up on google etc. This is actually a genuine fix in some instances (one that doesn’t break the bank either). I’ve actually not long completed a job for a customer like yourself in Plaistow who had the same problem - I’m happy to share images etc for ref. That being said you may already have trickle vents in place - if so they’re more then likely faulty (clogged and need replacing - you can clean them out but it’s more hassle then it’s worth). If you haven’t got an extractor in the bathroom, kitchen and or utility it’s wise to get one fitted. As for mould, it’s best to be treated, sealed and left to dry out properly then finished. That’s my opinion. I’ve had these issues within my own properties and dealt with various customers. It’s a little trial and error however, once a survey is carried out and the most common factors addressed it normally ends up fine. Regards Tony - All-Apertures