My dry rot diary

Soldato
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I can see this being a bit of a saga, so I'm starting a thread about it.

I've just bought a house, and we knew it had dry rot behind the shower. We got a damp & timber report for the mortgage company, and we got it from Rentokil to ensure that it was all done through a reputable source. The report showed up dry rot and wet rot behind the shower, to the point where it caused a visible degradation of the skirting board on the other side of the wall. The division between the shower and the adjoining bedroom is stud walling and plasterboard. The tiles are stuck directly to the plasterboard, and water has passed through the grout causing untold levels of damp. The pipework is pretty "creative" too, and there are no valves to shut the water supply to the shower or sink off, so I'm guessing this is a terrible DIY job, or a cowboy plumber / builder.

Rentokil surveyed the damage by pulling up the carpets and pulling bits of the skirting board off in the bedroom. They estimated treatment including a few patches of woodworm under the stairs and in the loft, to be £2083.

We got that done by way of a retention clause in our house sale, so the vendor's paying for it.

Rentokil have now taken the skirting board away, and realised it's a lot worse than they thought. The following pictures were taken in the bedroom that joins onto the shower's wall.

dry-rot-1.jpg

dry-rot-2.jpg


All that nastiness is on the SHOWER's side of the wall - Not the bedroom's side. Until this morning, they were convinced they were only going to take away the BEDROOM side and re-plasterboard; effectively sealing the dry rot back in!!!

I've had a word with the guy doing the job and he's fed back (god knows why I should need to get involved in what seems like such a stupid decision-making process), and apparently two guys are coming in tomorrow to remove the shower tiles on the other side and re-plasterboard that side too, as well as treat the rest of the timbers.

I'm not sure if it's just a mix up or what, but I'll let you know what happens!
 
We did a dry rot job a few months ago. It started on the timbers under the ground floor and grew up the wall behind the plaster and started to rot a window sill on the first floor bedroom! The reason for the initial damp was due to there being no ventilation under the floor.

£2083 is a ridiculous amount for that. Make sure they replace it all. I'd also just check under the floorboards to make sure it hasn't spread to the joists.

Might be a good idea to tank the walls near the shower to stop it happening again.
 
Mark A said:
We did a dry rot job a few months ago. It started on the timbers under the ground floor and grew up the wall behind the plaster and started to rot a window sill on the first floor bedroom! The reason for the initial damp was due to there being no ventilation under the floor.

Whoa - Rotting through a whole wall by the sound of it!!! Ours was fed by moisture from the leaking shower, so it ceased to spread since we have never used the shower, and the house has been vacant for six months. They're replacing the flooring in the bathroom, both sides of the plasterboard, and a few of the timbers in the stud walling, and they've treated the lot. So far so good!

I'm now considering getting aquaboard for the areas in the shower rather than plasterboard. They're fitting plasterboard at the moment, but I can always take it back off and put aquaboard up instead.

Mark A said:
£2083 is a ridiculous amount for that.
You'll be pleased to know that the vendor is paying for it as part of a retention clause, so I won't pay a penny. :) They have also treated woodworm in a few places too that showed up in the damp & timber report.
 
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Rather than using plasterboard they would be better using some WEDI board or Hardibacker. especially if being tiled to again.

"Waterproof" when used to describe grout means that it will not be damaged or deteriorate when in contact with water. It does not mean that it provides a watertight barrier to the passage of water.
 
Yeah they're pretty inflexible when it comes to what goes back up. They're very much replacing like for like, and I'll have to upgrade it myself. I haven't paid for it, so I'll take that on the chin and put something else in. WEDI board looks good.
 
Not sure what wedi board is but any shower wall should be boarded with green 'water repellant' plasterboard anyway.

A good tiler will seal the shower wall resulting in years free showering :)

Jb
 
Is that some electrical cabling spliced together with some connecting block and wrapped in insulating tape I see there?!?!?

looks like it could just be a lead for a light switch :S what's the best practice for taking care of that when you have walls down? connecting block and tape is better than nothing surely?
 
Not sure what wedi board is but any shower wall should be boarded with green 'water repellant' plasterboard anyway.

A good tiler will seal the shower wall resulting in years free showering :)

Jb

WEDI board/ Hardibacker etc is what decent Tilers use.
 
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