The original post: /r/diy by /u/thunder12 on 2024-11-13 07:50:26.

Hi, since we moved into our 1939s semi last year, we’ve noticed lots of condensation in the windows on a morning. Ive just bought some humidity sensors and in most rooms the value goes to 70% with our bedroom and the toddler’s bedroom going to 80%.

I have some ideas on how to bring the levels down but wanted to get advice before proceeding:

• PIV install in loft. Unsure if this will work as the loft rafters are insulated with mineral wool and cladding has been installed over the top to hold it in place. Likely exacerbating the issue.
• install trickle vents on all windows.
• install extractor fan in bathroom (none currently).
• house has mineral wool cavity wall insulation. Get it removed to let house breath.
• just buy dehumidifiers. Tbh would rather solve the problem at its source.

Thoughts appreciated on the most cost effective solution.