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Damp Proofing

patches of damp

Anonymous user 09/03/2024 - 3.23 PM

Almost one year ago the back wall of my Edwardian house render was completely removed down to the brick. It was redone with 2 layers of cement ,pebble dashed and painted.Over approximately the last 6 months several patches of emulsion from this internal wall has bubbled off in three rooms.It is impossible to repaint with further emulsion as the plaster appears to be damp and wont accept the paint.The plaster on the internal walls was done about 2 years ago and appears to be intact.Can anyone help or advise why this is happening and what i can do to improve this so I can repaint as it doesnt look very good.Your opinions would be much appreciated.

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3 Answers

ADR Property Maintenance

Rating: 5 out of 5

Boston

should have been done with N.H.L. render which would have allowed any moisture to escape the building, the cement render is only holding dampness in the building. good luck Alex

Answered25 June 2021

Damp Investigations

Rating: 5 out of 5

Southall

Knowing the difference between internal render and internal plaster is important. Plaster is hygroscopic and will self dampen if applied at a thickness greater than 3.0mm . You need to check the thickness of the internal plaster; cut out a tiny patch in the most affected area,down to the render to measure .

Answered12 July 2021

Anonymous user

Hi , you should have had a damp survey on the building. External proofing will not stop rising damp. You need to knock off the internal render and do a internal damp course to eradicate the damp. Hi hope you find a contractor with good reviews you should be paying roughly about £150 per meter square for knock off treated and finish plastered thanks

Answered23 July 2021