Black and gray mould on floor joists after leak (1st floor)

Joined
24 Nov 2010
Messages
1
Reaction score
0
Location
Southampton
Country
United Kingdom
Hello,

I would appreciate some advice on some mould I have noticed on a couple of floor joists on the 1st floor.

Photos are here: http://picasaweb.google.com/dgorissen/Damp?authkey=Gv1sRgCJSr1Zaq2PClqgE&feat=directlink

Background:

* over a period of 2 weeks we had 2 leaks relating to a poorly capped pipe after removing a radiator
* the water sprayed onto the carpet and seeped under the floorboards, over the plaster lath beneath (this is on the first floor) and down the electrical light socket into the room below.
* Its hard to guess how much water leaked into the floor, a very rough guess is 20-30 liters
* we shut everything off properly, removed all the carpet and let the room dry with (after a few days) a dehumidifier for about 1 week

Now the situation is:

* I lifted some floorboards and inspected the joists beneath
* I noticed a gray fluffy ridge of mould, running along the bottom 2-3 cm of two joists. The plaster lath between both joists also shows some grey mould.
* I also noticed, further down the room in a different part some patches of black mould near the top of a different joist (strange since I dont think water reached here)
* there is also a patch some strange dry, white foamy mould (?) in another part of the room.
* I also noticed some woodworm holes here and there

There are two joists that seem most affected. Its very well possible some of this existed prior to the leak.

On the whole the mould seems mostly on the surface as the joists themselves still look quite solid and dont feel soggy (perhaps slightly soggy in the area closest to where the leak was). But I do not trust the situation and want to be sure the mould will not spread before I put down carpet.

The dehumidifier is still running but as its a small domestic unit it may take a while to really dry things out (or maybe its simply not good enough?).

My best guess: continue drying with dehumidifier and paint with with wickes fungicidal wash where possible (though if I want to paint everything I have to pull up all floorboards, something Im not looking forward to :/).

Any thoughts as to how to best deal with this?

Many thanks,

Cheers,
Dirk
 
Sponsored Links

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Back
Top