Damp issue

Hi,
The kitchen was redone around 18 months ago. At that time, this specific wall was replastered, and closed 2 vents as well. Later, the wall became like in the photo - "WithPlaster". Then I assumed that it is a rising damp issue and removed the plaster a couple of weeks ago to replaster that section with these

https://safeguardstore.co.uk/dryrod-damp-proofing-rods/ & https://safeguardstore.co.uk/dryzone-renovation-plasters/ and 2 vents open.

I can't see any moisture or dampness on the wall now without plastering that section. But, I noticed that there is a small water ingress issue in the corner of the floor (it is a tile floor on top of the concrete floor ). I can also see that the Black Damp Proof membrane is not completely covered throughout (I think the width is not enough DPM). I would like to get your opinion to fix this moisture issue in the corner without redoing the floor area around that corner.

Can't I apply this type of product - https://safeguardstore.co.uk/drybase-liquid-applied-dpm/ to that small passage to cover up the missing DPM and add a small amount of concrete on top of that to fill the gap up to the floor level or do that process other way around (Fill the gap with concrete first and then apply the drybase liquid?

Thank you

you have a severe source of water affecting that wall. It might be a plumbing leak. You say it is a kitchen so no doubt it includes water pipes and drains.

you have to find and rectify the source of water rather than using "damp-proofing" remedies.

the floor is concrete so water may be soaking into it.

the bottom of the wall looks wet on the outside pic. Please take some photos of the bottom of the wall, and the ground or paving against it; and some wider pics showing the whole of the wall, including gutters, downpipes, drains, manhole covers.

What is in the adjacent room? and the room above? Is there a sink, washer, shower etc?

That external wall looks damp - damp joints, damp at the bottom above the DPC, and especially damp around that top air brick.

And it has a stupid amount of air bricks.

Investigate what's above, the condition of the joints and you may need to investigate the cavity too.

It looks like a brick pier between 2 doorways.

I have seen something similar in very exposed locations where the cavity trays above the door and window openings do not have stop ends causing water to run off the end of the tray and soak the inside of the cavity. Becomes more of an issue if there is debris in the cavity or poorly installed cavity wall insulation. Might be worth exploring.

Thank you for all your responses.

At last, I decided to remove the Deck.

I can now see that there is a watermark below the doorways and towards the left side of the wall as well (This watermark line is one brick-level below the existing DPC line). That level was covered before with the Deck. I can see there are some gaps between bricks as well. I'm thinking to patch those gaps first and apply some sort of water protection product like this - https://safeguardstore.co.uk/stormdry-masonry-protection-cream/ to this area. Could you please suggest a good product to patch the gaps & holes?


Thank you again