Internal wall reverse Z bulge

[BenB1981]

I noticed this reverse Z-shaped protuberance in the hallway last night with the light on. It is just a wall that separates the living room and the hallway - it does not back on to outside.

Does anyone know what it is and how it would be fixed if you think it needs fixing? Thanks.

 

[opps]

It looks like the plaster has cracked and may be slightly blown. If you tap the area, does it sound more hollow than the surrounding areas?

BTW the wall has been lined (horizontally).

 

[BenB1981]

Hi, thanks I'll check when I get back from work. I forgot to mention the wall is papered and the straight line is two separate sheets of wallpaper.

If blown plaster should it be repaired or is it more a cosmetic issue?

 

[opps]

Hi, thanks I'll check when I get back from work. I forgot to mention the wall is papered and the straight line is two separate sheets of wallpaper.

If blown plaster should it be repaired or is it more a cosmetic issue?

Difficult to say from here.

If you are lucky it might be possible to lock the blown plaster in place (assuming that it is blown and bouncing).

If there is no bounce at all, you might be able to get away with feathering the ridge with a soft filler such as Red Devil OneTime.

If it is very slightly bouncing sometimes drilling a series of small holes and squirting in PVA wood glue can help to lock it into place. There are no guarantees though.

Worst case scenario, hack the blown plaster away. The problem there is that ideally, a sufficient amount of lining paper will need to be removed first so that the section can be replastered. A decent decorator should be able to cut in a new section of lining paper.

 

[BenB1981]

Yeah it feels hard when I run a finger over the shape, I can't feel any noticeable crack or anything like that. I've seen the odd lump and bump in plaster in different houses before but was just struck by the shape here. No idea if that kind of shaped defect in plaster is common or not.

 

[opps]

Yeah it feels hard when I run a finger over the shape, I can't feel any noticeable crack or anything like that. I've seen the odd lump and bump in plaster in different houses before but was just struck by the shape here. No idea if that kind of shaped defect in plaster is common or not.

Assuming that the ridge is new, the plaster has cracked. Lining paper is pretty good at dealing with minor cracks. When they get bigger, the paper will split.

 

[BenB1981]

Ah right, cheers. I've tapped the Z shaped now and to be honest it sounds the same as the surrounding area. It seems like the plaster has cracked under the paper. I have got somebody coming out next Wednesday to assess it

 

[BenB1981]

He suspected wall tie corrosion causing a crack although it is an internal wall but near the front door so maybe some pressure has been forced on the plaster from a dodgy tie.

 

[opps]

He suspected wall tie corrosion causing arack although it is an internal wall but near the front door so maybe some pressure has been forced on the plaster from a dodgy tie.

So it is a relatively new build? Most of my work is victorian houses. I am a decorator rather than a builder, they have solid 9" walls.

Please let us know how you get get on.

Best of luck.

 

[BenB1981]

Hi I will do. I'll update after they've been next week. They are wall repair specialists.

It's actually a 1930s house so pretty old. It's just one of them things where you spot something and double-take, and think "has that just happened in or was it always there?"

I think I probably would have noticed if it was there before but there's always the chance I didn't.

 

[BenB1981]

I should add I only moved in last December so haven't lived here for years.

 

[Koolpc]

Wall tie my azz.....