Rising damp - 3 metres high!

[desbury]

Hi, greetings from Ireland!
See photo attached of my large kitchen.  No ventilation issues.
House is redbrick build in 1904 and renovated 25 years ago.
See the "green circle number 1"... This is clearly rising damp.
However, see also green circle 4 and 2.    These are giving damp readings of 20% and 30%.

That whole internal wall is about 10 metres long with multiple damp patches.   See also that the photo shows the external of the kitchen (yellow). 
Note that the flat roof is not perfect but is 5 metres away from some of the damp.

QUESTION: Have I both rising damp AND another form of damp?   Is it possible that there is a "pool" of water hidden in the wall??

[ProDave]

Can we see a better picture of outside including more detail of what the ground surface is and how it relates to internal floor level please?

 

Are any other external walls, e.g. at the front of the house showing damp or are they okay?

[Roger440]

Unless your walls are made of sponge, moisture wont rise 3m. Around about 1m is normal.

 

Id suggest you have some issue from above as well as below.

 

Im going to guess no DPC given the age. And gypsum plastrer inside, and cement render outside?

 

[Nickfromwales]

6 hours ago, desbury said:

House is redbrick build in 1904 and renovated 25 years ago

So is this 9" wall brick with no cavity? I expect so.

 

What you have here, sir, is "penetrating" damp. Find the epicentre of each problem area and get the drill out. This will get messy and worse, before it gets better.

 

This isn't a rising damp problem, for sure, just rainwater finding its way down through the old mortar perps and into the interior surface of the wall, or, is the same thing you see with older walls that have knackered, corroded cavity wall ties that are then bridging the damp across them; you can almost find the fault to the nearest 100mm.

[desbury]

Thanks all for responding.  I have a theory...
See photo and notice the green arrow pointing on the top left... point "A"... this is drain from a 5 year old bathroom.

Would a leak from the drain in the bathroom have caused damp in point "B".   Point C has some damp too.

 

Edited 23 hours ago by desbury

[Nickfromwales]

Is the pipe sealed well with a good external grade mastic? 
 

Also, note the brick vent set into the wall, another possible cause or point where rainwater may be getting driven in. 
 

Water / damp does very mysterious things, unfortunately, but could you confirm if this is a solid brick wall without cavity? The air brick makes me wonder, or is that from an extractor fan / other?

[twice round the block]

You may want to pull the planters away from the wall to give some air circulation 

[ETC]

Vent is a larder or what was a larder.

Damp getting in at either the door jamb or lintel.