We are doing loads of thinking this morning about some of our
We bought an older house that has a conservatory. It is a all uPCV
affair that sits on a concrete base. Ever since we bought the house
we have had problems with damp and mildew. we had a leaky roof
repaired and vents put in the windows. There is also heating in
We still have damp problems and mildew is still growing. Is it
possible that damp is just coming up through the concrete? If so is
there any way of sealing the floor to improve things? Also is there
a way of ensuring there is a good seal between the floor and the uPVC
that is sitting on top of it? We can't afford to replace it but it
would be good if we could get it into some usable form.
Mildew seems to indicate a condensation problem.
If the conservatory has had a prolonged leaking roof or condensation
dampness before you bought it, then the floor may be damp from that and will
take a good while to dry out.
You could try either leaving the heating on 24/7 and vents open for a while
to dry the area. Or a hire a dehumidifier for a week and keep the
conservatory vents closed.
You can not discount the possibility of a failed or non-existent dpc or
membrane to the floor, but this would tend to show as damp area around the
edges, more so after rain, and some brown staining. In addition, in older
frames there may be a cold bridge from the frame and cill which leads to
If you notice lots of condensation on the glass or frame though, then you
need to address this issue. You may be keeping it too warm on cold days, or
moist air from your house is moving into the conservatory. Also clean up any
condensation as soon as it appears but at least twice a day.
Kill any mould with a suitable fungicide - 'Halophen' is a good trade
product, or it will just keep coming back.
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