I have a 3 bedroom 1950's ex council house. Since we have had double glazing fitted - we have had mould spreading in outside corners of the bedrooms (the bathroom is fine!)
I have taken down the fitted cupboards over the airbricks to increase air circulation + am arranging cavity wall insulation
My loft has minimal insulation of fibre matting aprox. 3-4 cm. I was hoping that by increasing the insulation to recommended depth would be sufficient to stop the condensation problem in the bedrooms.
I know that the eaves need to be left to allow for ventilation and was planning on raising joists ( at right angles to existing joists) in centre run of attic to allow for boarding over.
Am concerned that I could be transferring the condensation problem to the loft, Do i need to use any special membrane under the planned chip board?
Will the existing airflow through the eaves + occasional rips in roof membrane be sufficient to stop this?
Do I just insulate the sides and leave the central run with its minimal insulation and boarding?
Any advice or suggestions gratefully received - thanks