Rising damp or condensation

[CEllio]

This stain has been on an inside downstairs corner, against the party wall, for about two years. No sign of mould, no tide marks, no smell of damp, paint slightly flaking off. The room is a bit cold, and has a few small mould spots on the bay window area, but overall the room isn't excessively humid.

Does anyone know whether it is rising damp or condensation as I understand they can be hard to tell apart.

 

[Dollar]

Rising damp does not exist....

Show us externally

 

[devneydutch]

Is it on an external wall and is the room vented? Windows have vents on em?

 

[Stevieo]

It's not condensation

Condensation doesn't blow paint and plaster off walls

 

[Tinytom]

If you all read the OP it’s on a party wall
Check with next door maybe kitchen or bathroom backs on to it and is leaking
@Stevieo is right condensation wouldn’t normally blow plaster

 

[malc]

This stain has been on an inside downstairs corner, against the party wall, for about two years. No sign of mould, no tide marks, no smell of damp, paint slightly flaking off. The room is a bit cold, and has a few small mould spots on the bay window area, but overall the room isn't excessively humid. View attachment 72621 Does anyone know whether it is rising damp or condensation as I understand they can be hard to tell apart. View attachment 72618 View attachment 72619 View attachment 72620

damp is under 1 metre in hight as gravity takes the water down. over this hight it is condensation.

 

[devneydutch]

If you all read the OP it’s on a party wall
Check with next door maybe kitchen or bathroom backs on to it and is leaking
@Stevieo is right condensation wouldn’t normally blow plaster

A party wall can still be attached to an external wall

 

[Dollar]

If you all read the OP it’s on a party wall
Check with next door maybe kitchen or bathroom backs on to it and is leaking
@Stevieo is right condensation wouldn’t normally blow plaster

party wall adjoins external

 

[Stevieo]

If you all read the OP it’s on a party wall
Check with next door maybe kitchen or bathroom backs on to it and is leaking
@Stevieo is right condensation wouldn’t normally blow plaster

Yep.

Condensation manifests as mould in the coldest spot in the room. Usually ceiling lines upstairs.

So now it's a process of elimination.

Start by knocking on next door. Pretty much guarantee they've sprung a leak that they're not aware of.

After that, penetrating damp. Especially if you've got that shitty polystyrene insulation. It bridges the cavity. Check the render or/and pointing if that return is external.

 

[Kimbo]

I have wallpaper coming off my bedroom. It’s on an outside wall and feel damp and wet. Ive been leaving window slightly open by day and have had a dehumidifier running. The wall is so cold. I did have polystyrene under wallpaper until the decorator removed it. Could this just be condensation no mould anywhere

 

[Tinytom]

View attachment 72641
View attachment 72642
party wall adjoins external

Iv just noticed it’s all around the cable entry hole

 

[brimplas1]

damp is under 1 metre in hight as gravity takes the water down. over this hight it is condensation.

Gypsum plaster can suck it higher than that pal..

 

[Danny]

I have wallpaper coming off my bedroom. It’s on an outside wall and feel damp and wet. Ive been leaving window slightly open by day and have had a dehumidifier running. The wall is so cold. I did have polystyrene under wallpaper until the decorator removed it. Could this just be condensation no mould anywhere

More than likely.

our bedroom at home does not get sun on 2 off the walls and we get wet windows and the walls get wet... we put a dehumidifier on and a rad on and it disappears...

it worked in our favour because we got £12k knocked off the price to fix the damp there was no damp at all

 

[The Hobo]

Being a party wall I would go for a burst downpipe outside

 

[Clus1985]

This stain has been on an inside downstairs corner, against the party wall, for about two years. No sign of mould, no tide marks, no smell of damp, paint slightly flaking off. The room is a bit spider solitaire 2 suit cold, and has a few small mould spots on the bay window area, but overall the room isn't excessively humid. View attachment 72621 Does anyone know whether it is rising damp or condensation as I understand they can be hard to tell apart. View attachment 72618 View attachment 72619 View attachment 72620

I think there's a good chance it was leaking and wet.

 

[The Hobo]

I think there's a good chance it was leaking and wet.

Dig the wet ground out and fill back in with large gravel draw a pencil line around edge of damp area then see if it starts to dry back from it

 

[essexandy]

Dig the wet ground out and fill back in with large gravel draw a pencil line around edge of damp area then see if it starts to dry back from it

People need to listen to your many decades of experience mate, we can all learn a thing or two.
With this in mind, what sort of pencil would you advise for this situation?

 

[ChrispyUK]

People need to listen to your many decades of experience mate, we can all learn a thing or two.
With this in mind, what sort of pencil would you advise for this situation?

Prob uses a 4B these days

 

[paulf]

Prob uses a 4B these days

A well considered choice.

 

[essexandy]

Prob uses a 4B these days

I was thinking 2B or not 2B, that is the question?

 

[Stevieo]

Prob uses a 4B these days

No you don't

 

[ChrispyUK]

No you don't

Wasn’t quoting me you knobhead.



Read the fooking thread before commenting ffs

 

[Stevieo]

Wasn’t quoting me you knobhead.



Read the fooking thread before commenting ffs

Yes you were

 

[paulf]

I was thinking 2B or not 2B, that is the question?

The answer is not 2B.

 

[ChrispyUK]

Yes you were

No I wasn’t.
Now trot on as there are other threads that you don’t know the answer to that require your attention

 

[paulf]

No I wasn’t.
Now trot on as there are other threads that you don’t know the answer to that require your attention

2B sure.

 

[Cockney1]

No I wasn’t.
Now trot on as there are other threads that you don’t know the answer to that require your attention

 

[Stevieo]

No I wasn’t.
Now trot on as there are other threads that you don’t know the answer to that require your attention

No there aren't

 

[The Hobo]

People need to listen to your many decades of experience mate, we can all learn a thing or two.
With this in mind, what sort of pencil would you advise for this situation?

A damp proof one

 

[tradevision]

doesn't blow paint and plaster off walls