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Plastering & Rendering

Mould around bay window on ground floor and blown plaster

Anonymous user 23/02/2024 - 2.47 PM

I'm 71, living on a limited income. I live in a 3 story mid-terrace. I found black mould in the area around the bay window on the ground floor and took 3000 out to have re-pointing done. I sprayed for mould, stripped the wallpaper and put new wallpaper up. The plaster was not in good condition. I hoped. The mould has come come back, not as bad as before. I've stripped wallpaper and the plaster is blown. I'm taking it off. Around the bay window, it comes off down to the brickwork. Halfway down the wall, it comes off to what feels like solid rough concrete. (I assume that's a lower layer of plaster.) First, would a professional insist on a specialist mould treatment company being called in? Second, what should the tradesman do to make sure the problem doesn't come back? Third, any do-it-myself solution? (I can paint, wallpaper, hang shelves and have done a bit of replacement tiling. "Adequate" rather than "Very Good" describes my efforts.)

Are you a tradesperson and able to answer this question?

1 Answer

Anonymous user

It sounds to me like the windows have not got a proper seal around them or you are suffering with a lot of condensation. The cill area is the most likely course of the water coming in through to you inside cavity and then blowing the plaster off. I would suggest you get the cill and the windows re-sealed. This would be the first action and then look at the conversation. The reason for the condensation will have many factors but the most common is a change in some way to the house or room. It also could be down to the change in the weather. If you get a cold wind on the glass, the room has heating working to keep the room warm it will enable the atmosphere to hold a high percent of moisture. If the room is not vented then you will get the high humidity that the room has not dispelling. It gets in contact with the inside skin of the sealed units and then it hits the dew point and relinquishes the moisture on the glass pane. The unit may have a leak were the argon in the cavity has escaped but if this is so the unit would go misty in between the glass. The answer is the just change the glass sealed unit for an A rated unit. If the window is ok then this is the best answer to the problem.

Answered11 January 2014