I have just ripped out the old kitchen units and am staggered at the
amount of black mould present on the walls behind even though the walls
are dry and there are no leaks in the pipework or nothing.
My first instinct is to wash the walls several times with domestic
bleach allowing a day between each washing.
Then again, I read that the spores could be well embedded within the
plaster and that the bleach treatment would only be temporary.
I want to get this problem sorted before I ask someone to re-plaster the
whole room and get the new kitchen installed.
What would be the best permanent treatment to kill the mould and its
spores stone dead?
Condensation would be expected there against an outside wall.
Thermal insulation so the wall surface doesn't get cold.
I don't bother to put backs on cupboards against outside 9"
brick walls, as this pretty much guarantees a cold area where
condensation will form, although it's also important not to
pile things up against the back wall in that case, or those
items have the same effect as the cupboard back -- insulating
the wall from the room.
Killing the mould is pointless. Unless you change the conditions
which allowed it to grow, it will simply reappear, and if you
change the conditions (e.g. get rid of the condensation), then
it can't grow. You'll need to wash off the surface mould before
replastering, but that won't kill the mould. Paints anfd washes
with fungicides exist, but I'm not a fan of introducing such
toxins in the home.
What you could do is stick insulation board to the wall behind
the cupboards. It needs to be sealed around the edge so air from
the room can't get behind it. Also, don't paint it -- the mould
is probably deriving its nutriants from the paint.
You could just ignore the problem. It's probably been there since
just after the last kitchen was fitted. Has it caused you any
problems over that period?
[email address is not usable -- followup in the newsgroup]
Excellent advice Andrew. Good point about not painting the insulation board
... didn't know it may provide food for mould ... must remember that one.
When we bought our 1900 house there was a fair amount of mould on some of
the exterior walls (no cavity but double brick) behind the old kitchen
cabinets. When we fitted the kitchen we ran the radiator pipes around the
back of all the cabinets just above the floor which has helped to remove the
cold and damp spots on the walls whilst at the same time providing a more
balanced heating of the kitchen and no black mould on the walls.
Dunno, but mould from condensation is common in rented properties, I sort
out about half a dozen a year on average. The Polycell stuff works, as does
their Stain Stop paint.
Never get call backs. Always write a disclaimer on the invoice, roughly 'it
will come back if you don't sort out the cause'.
Dave - The Medway Handyman
I've just had to do a the ceiling in an inbuilt wardrobe. There's was
no real ventilation and the loft directly above was not insulated. My
local DIY store had bottles of fungicides for internal and external
walls. I also painted the wall with a Dulux bathroom paint that
contains a fungicide. This stated five years mould free. So I'll
probably give another coat in a few years.
As with the other posts, you need to deal with the underlying cause if
at all possible i.e. insulation and ventilation.
One tip with the fungicide, when it says don't leave in contact with the
skin it means it. I was using rubber gloves with a fabric material at
the wrist. I got some of the fungicide on the material but thought it
wouldn't be an issue and finished the job. I had a reaction to it and
it left a sore rash for a few days afterwards.
Best of luck
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