Originally Posted By CooperMan
Originally Posted By howard
Originally Posted By Wirewheel
Howard, are your walls constructed with dob and dab plasterboard but unsealed at ceiling and skirting height?


Dont really know but from looking in the built in garage, I reckon they will be thermalite blocks with stuck on insulation. All floors etc are sealed. The bungalow is a one off built by a surveyor for himself and using his subbies from work. Judging by the man and by all the fittings, it wasnt done on the cheap.

My guess is that the problem is a/ bungalow b/ size c/ bay windows with buttresses d/ narrow double glazing in mahogany frames


Howard, at work we have thermal imaging done in the latter stages of construction (& sometimes air leakage testing) it can be surprising where it shows up faults


Would be interesting to apply here though I can get some idea from observation ( and a physics degree 50 years ago). Snow doesnt melt on the roofs at all quick but if I use an IR thermomeneter inside the house there is a marked tem[perature decline between the wall surface and the bay windows - like 6C. Problem is that the bays were built supported by flying butresses so the underside is likely no more than a couple of layers of 10mm ply with maybe an inch of grp insulation inbetween. And then there are narrow glazed windows that stream with condensation first thing after a cold night. Plus draughts round the two entrance doors.

Probably doesnt help that the gas boiler is an old style non condensing one of 30 years age but then I can offset no maintenance costs against the high costs of the modern electronified types