Can anyone advise the best course of action to get rid of mould growth beneath a bay window? Not sure whether it's caused by penetration (outside of the house is rendered), or whether condensation is the culprit (although there's no conspicuous sign of condensation elsewhere.
Can be seen here:
On Tuesday 19 November 2013 11:19 Apellation Controlee wrote in uk.d-i-y:
First a wipe down with bleach.
Second - that's a bedroom? Stick a humidity meter in there.
My ali windows need a bleach once a year due to condensation - a sleeping body or two emits a *lot* of water vapour and if that wayy is solid brick, so cold, it will get condensation on a regular basis that may not fully dry.
My walls are cavity and are fine - just the bay windows...
If a humidy meter is reading high all the time, a dehumidifier might be one solution (run in the day for a while) or opening a window a crack.
You may find that next time you paint, using a more wipeable paint like Dulux Endurance (what I have) means that any off bits of mould might wipe off better than a matt paint.
On Tuesday 19 November 2013 11:52 Tim Watts wrote in uk.d-i-y:
^ wall
It could be condensation. Under a bay window it's not uncommon to find an extra thin wall, single brick even, especially in lower spec period houses.
Yes, solid wals on north facing sides of houses are a pain. I have one of these, no matter what the outside finish, short of lots of insulation would fix it. Brian
There appears to be more at the lower levels, any chance it could be rising damp? Just a thought.
9 feet high and rising...?
Jim K
There seems to be quite a lot of condesnation on the bottom of the window pane ...
Fair comment. Looking at the condensation on the bottom of the aluminium frame it does appear to be dripping off it and also the wood appears to be marked by water stains...could this be the source? Maybe running on to the sill then dripping off the sill and onto the wall.
Its a first floor window with a window below it. RD rarely goes above 1.5 m and normally below 1m This is condensation where there is a cold bridge and the mould pattern is a classic condensation one
yes in addition to those who correctly say use bleach etc you can do any of the following a) get rid of the plaster and put in PU foam backed plaster board from floor to window (best job) fixing with mechanical fixings (2" plastic washers with SS nails as per external insulation fixings plus plasterboard adhesive) b) put on 3 mm or similar wallpaper polysyrene (Yuk!) but it will work a bit c) anti condensation paint d) heat up the wall with a skirting rad
Thanks to all for the excellent responses. :-)
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