Damp in walls

[skiver]

Property has been damp proofed but still signs of damp in wallpaper, how can I cure this or restrict it spreading.

[skylight]

Hi skiver, If your wallpaper is dry and just has the water marks left give it a couple of coats of white undercoat and leave to dry, then emulsion. Has worked for me in the past. cheers skylight

[skiver]

Thanks skylight, I will try that as a last resort but my paper is patterned.

[skylight]

Sorry skiver, I was assuming it was Anaglypta or embossed paper that was already emulsioned. If it's ordinary wallpaper you may have to take it off, then undercoat the bare wall or buy some special sealent to paint on wall before papering again. cheers skylight

[RATTER15]

Have these marks appeared since the damp proofing work was carried out.

To my knowledge all internal rendering would have been removed to a height of 1 metre ( for rising damp or the whole area for penetrating damp) in affected area for treatment, so why have you got wallpaper there, unless you have papered it since the treatment. You should have been advised not to wallpaper for six months, by which time the wall should have dried out.

I was in the damp proofing trade only a short while ago, things could have changed in the last few years but I doubt it.

[skiver]

Hi Ratter.
House was damproofed 3yrs ago, papered last year but damp showing about 4foot up walls now.