Damp at skirting

[pidgeon1]

I have notice this damp in the corner of the room, it appears to be rising and not coming down the wall.

Dehumidifier run for three days getting 2 litres of water a day, some could be coming from inside the room.

Picture of outside wall and the damp course has no soil etc above.

What would be my next course of action.

Thanks for advice.

 

[JohnD]

Stand back and take wider pics inside and out please. Scrape back the gravel. The ground outside looks saturated.

Is it a concrete floor? Peel back the carpet and look for damp.

Tell us what those water pipes are doing, next to the water patch.

 

[pidgeon1]

No damp under carpet just skirting.

picture of inside wall, the radiator pipe goes to the right underfloor, no sign of any leakage.

the hole to the left is where there was a air vert 40 years ago (I removed the filling to expose and see if I could see any damp ) when built as the cavity filled with snow in a blizzard, this drier out many years ago.

Full picture of outside wall,

Garden hoses they will not be the course of this.

The manhole takes bathroom and kitchen water and is well below the damp course.

Hope this helps.

 

[JohnD]

and the end wall next to the patio doors please. Where does the blue pipe go? Is it at mains pressure? Can you scrape back the gravel and see how wet the ground is?

your outside wall looks rather wet, had it been raining? Can you show us the gutter above please?

I can see the vent or airbrick on the inside, but not on the outside. Were you able to see the cavity, and is there rubble at the bottom?

Is it a concrete floor? Is that underfelt I can see?

Is there by any chance a bathroom overhead?

the electricity socket looks particularly wet. Do the aerial cables run down the wall cavity, and are there signs of water where they go into the box?

 

[pidgeon1]

Blue pipe and green pipe both used for gardening watering not left under pressure, disconnected at tap, cannot be the cause of damp.

No gutter this side, flat roof drains to otherwise and front of conservatory, flat roof no signs of any tears or holes.

Unable to see in cavity beyond hole. This seems dry inside, damp appears from electric back box to the left as in pictures.

no air vert was put on outside wall by builder 40 years ago just inside and what I can remember it dried out the wall.

Concrete floor no sings of any damp spreading beyond skirting or around radiator pipe.

Back box was wet thats why it's pulled out to ventilate will replace box when damp sorted.


Aerial and Electric wires were in cavity and runs to the left side of wall.

Walls were filler by Rentokill with what looked like glass fibre blown into cavity very many years ago NEVER been a problem with this in the bungalow.

Container put under header tank fill to see if there are any demands water to replace IF THERE IS A UNDER FLOOR.

Hope this is enough for you ?

Is the next step removal of bricks on outside wall

Thanks
John

 

[JohnD]

no air vert was put on outside wall by builder 40 years ago just inside and what I can remember it dried out the wall.

That's interesting. It suggests this damp has been a long-term problem.

So it's a concrete floor. Do you mean there is no sign of damp in the floor?

What does "IF THERE IS A UNDER FLOOR" mean?

If the cables are in the cavity (this is incorrect practice) water may be running down them from above.

Where is the aerial?

Photos of the end wall would be helpful, especially around the top and side of the door and the roof detailing around the corner.

It's a flat roof so there may be an unseen leak, or there may be water penetration around the patio door.

Can you pull the gravel back to see how wet the ground is?

Is there any rubble at the bottom of the cavity?

Since you have pipes and drains nearby they can't be ruled out. Once wet, a patch can take weeks or months to dry.

 

[pidgeon1]

That's interesting. It suggests this damp has been a long-term problem.

So it's a concrete floor. Do you mean there is no sign of damp in the floor?

What does "IF THERE IS A UNDER FLOOR" mean?

If the cables are in the cavity (this is incorrect practice) water may be running down them from above.

Where is the aerial?

Photos of the end wall would be helpful, especially around the top and side of the door and the roof detailing around the corner.

It's a flat roof so there may be an unseen leak, or there may be water penetration around the patio door.

Can you pull the gravel back to see how wet the ground is?

Is there any rubble at the bottom of the cavity?

Since you have pipes and drains nearby they can't be ruled out. Once wet, a patch can take weeks or months to dry.

As we have rain here for the next few days no good digging outside of wall, asking a local chap to remove some bricks to investigate cavity around the area, and go from there.

Power cables were put in 40 years ago at the time I think this was acceptable practice.

 

[RonnieE]

A salts analysis test would give you some useful information on the water source.

 

[Dodgyrog]

Large black pipe behind the ladder - guttering downpipe or soil / stack pipe?

I had near identical issue in a wall in a victorian house where the vertical soil pipe fed down in to a sewer pipe that effectively rang along the line of the wall and then came away from the wall towards a manhole cover - could almost be the same layout as yours. One day out of the blue there was a wet tideline a foot or so up the wall inside. Eventually dug out around the outside and found what looked to be a bodge job inspection cap in the top of the horizontal run of sewer pipe had given way and during a blockage in the sewer water had been pushed up through the bodged inspection cap which was right under the wall and then worked its way up the wall. Not sure if its relevant for you but the similarities in what I can make from your layout are uncanny - although it looks as though your corner extends a bit further past where you would expect the pipe run to be. Ok you have damp course, mine only had chemical damp course but something may be breaching.

Hope you get to the bottom of it.

 

[pidgeon1]

Large black pipe behind the ladder - guttering downpipe or soil / stack pipe?

I had near identical issue in a wall in a victorian house where the vertical soil pipe fed down in to a sewer pipe that effectively rang along the line of the wall and then came away from the wall towards a manhole cover - could almost be the same layout as yours. One day out of the blue there was a wet tideline a foot or so up the wall inside. Eventually dug out around the outside and found what looked to be a bodge job inspection cap in the top of the horizontal run of sewer pipe had given way and during a blockage in the sewer water had been pushed up through the bodged inspection cap which was right under the wall and then worked its way up the wall. Not sure if its relevant for you but the similarities in what I can make from your layout are uncanny - although it looks as though your corner extends a bit further past where you would expect the pipe run to be. Ok you have damp course, mine only had chemical damp course but something may be breaching.

Hope you get to the bottom of it.

Thanks But no the same problem I have.

I am going with the possibility thats it's rubble dropped onto damp course and bridging the gap ., will find out when outside brick removed in a week or two.