Damp on internal walls

[Mr.Stu]

As I continue to rip this house apart I've come across an area of concern. Looking for advice, not sure where to start on something like this.

The area in question is shown on the flooplan below. It is in the corner of the former kitchen, nothing to note on the floor above in that position, and the damp appears to be bottom-up anyway.

Few pics of the problem spot:

My plan is to remove the tiles and boxing from the potential problem spot above and hope its a leaky radiator pipe.

However - if its not that, what are my option? Any ideas what could be the root cause - faulty DPC?

How would you tackle this?

 

[Mr.Stu]

Thanks night glow, I'll see if I can get the boxing off without trashing the place. Any tips on that front?

I owe you several beers - you've helped me a lot over the past couple of months

 

[Mr.Stu]

As an update. Rad is fine, DPC seems to have failed.

I've removed the radiator, skirting (major ball ache) and knocked 1m of plaster of all along the wall.

Quotes to inject new DPC are in the region of £250 + vat.... reading up on the process it doesn't seem to be rocket science. £30 for a couple of tubes of cream? Anyone DIY'ed it?

 

[Mr.Stu]

Where would you drill for the new injection?

Here is a slightly old pic before I hacked off everything.

Original DPC seems to sit in mortar above first brick. Would you drill in to the same mortar or go one joint above?

 

[Mr.Stu]

Like this?

Off topic, the guys who quoted £250+vat to inject the gel also quoted another £300+vat to do the rendering after!

My usual plasterer will do the entire room for less! Guess I just need to make sure he uses the right stuff not he render before full skim.

 

[Mr.Stu]

Really? I thought rendering straight on to the brick is the norm even after DPC fix? Render with the right mix, wait a day, then come back and skim?

 

[Mr.Stu]

Alright, cheers chaps. Will let you know how it goes.