Room knock through - what about DPC?

[JFH777]

After a bit of advice following a knock through... As you'd expect, there was a DPC atop those concrete blocks in my picture, now removed along with the wall. Next step is making good and I was planning to put a latex compound down to smooth/sort out slight level differences. BUT, without the DPC, I worry about the risk of moisture ingress via capillary action. It's a block and beam floor and those concrete blocks are ultimately in ground contact. What's the most practical way to resolve the risk?

[Nickfromwales]

https://www.toolstation.com/everbuild-black-jack-damp-proof-membrane/p10290?store=null&utm_source=googleshopping&utm_medium=feed&utm_campaign=googleshoppingfeed&gad_source=1&gad_campaignid=21016232523&gbraid=0AAAAAD-vLcX3SICQivfTjJrOYFQACEcF9&gclid=CjwKCAiA0eTJBhBaEiwA-Pa-hbx22hKHf4L0JhrXGpuqT5asuMzSUApyYANX_9hicTjUNIoDLEk_zBoCpeYQAvD_BwE

 

I'd chip away an inch or so from the top of those blocks, then apply the liquid DPC, and then after at least 2-3 coats have been applied you can back-fill with a self-levelling compound.

 

You can get 1L tins iirc.

[JFH777]

thanks that's not a bad idea

[Nickfromwales]

54 minutes ago, JFH777 said:

thanks that's not a bad idea

Just make sure you foam or mastic any gaps either side of the blocks so the SLC doesn’t just disappear down south.