Mouldy Plasterboard - What To Do?

[valleycushion]

We had a leak in the wall between our bedroom and our en-suite shower. It's been opened up and all dried. Now in the process of working out how to sort the mould that's left.

Can I just use something like this Dryzone Mould Remover & Prevention Kit to clean and remove it before reinstating the wall, or am I looking at having to replace the plasterboard. I'm hoping not the latter as I'm assuming the ensuite shower tiles are connected to the other side of the plasterboard.

Thanks

 

[yorksbuilder]

I'm afraid if your ensuite tiles are onto plasterboard you need to look at removal of these and replacement with a proper tile backerboard system that is correctly tanked & waterproofed. Otherwise the leak will reoccur

 

[valleycushion]

I'm afraid if your ensuite tiles are onto plasterboard you need to look at removal of these and replacement with a proper tile backerboard system that is correctly tanked & waterproofed. Otherwise the leak will reoccur

TBC, I'm only assuming the tiles are onto the plasterboard, I don't know anything about this stuff, but the ensuite was done by the previous owners at considerable cost (it's a very high standard, lucky us!) so assume they'd have done a proper backboard systems which is tanked and waterproofed. The leak came from a shower pipe seal.

So let's assume that there is a backboard system on it, does that mean I could take the plasterboard off to replace or should I not as it'll be attached to that?!

 

[yorksbuilder]

Assume nothing. If there is plasterboard visible there behind the tiles, its unlikely that they would have put backerboard on top of plasterboard. Also the depth the valve is through the board looks like no backerboard involved

There are ways of finding out:
- remove a fitting (valve front shroud or similar) from the shower side and look at the hole to see the walll buildup
- cut a small square out of the plasterboard from behind using stanley knife (high up the shower wall as possible) to see if you encounter backerboard or indeed tile adhesive. Beware some backerboards are soft foam centred type, dont cut through that

Prepare to remove entire boarding both sides of the wall and replace correctly

 

[valleycushion]

Assume nothing. If there is plasterboard visible there behind the tiles, its unlikely that they would have put backerboard on top of plasterboard. Also the depth the valve is through the board looks like no backerboard involved

There are ways of finding out:
- remove a fitting (valve front shroud or similar) from the shower side and look at the hole to see the walll buildup
- cut a small square out of the plasterboard from behind using stanley knife (high up the shower wall as possible) to see if you encounter backerboard or indeed tile adhesive. Beware some backerboards are soft foam centred type, dont cut through that

Prepare to remove entire boarding both sides of the wall and replace correctly

Thanks again, the ensuite is a wet room, so tiles everywhere, so impossible to see what's behind them without removing them... will get a builder in, seems like the right option.

 

[yorksbuilder]

I am talking about approaching from the bedroom side, not from the ensuite side - not suggesting removing any tiles at all.

Is it upstairs? Wetroom upstairs not the best idea, prone to leaks. Consider replacing with a shower tray.

Best to get a wetroom specialist/bathroom fitter&tiler to look, not a builder