In article , ""Bob Smith
\(UK\)" " "Bob Smith \(UK\)" says...


What are you trying to achieve and perhaps others can advise a different
method?

CM.


The electric meter cupboard really mouldy, because it has 2 external walls
(one is 3'x2', the other 3'x6") that get condensation. Ventilating the box
more than it already is (loose fitting doors) would bring more air in there
to be chilled, cuausing it to drop it's load of water. Since there are lots
of boxes and wires all over in there, I thought it would be easier to spray
on a layer of foam than to use polystyrene sheets.

How about ventilating it to the outside?