DPM inside blocks?

[mazzlebizzle]

Hi,

 

I have a single skin wall made from heavy concrete blocks that are 100mm wide. There are four piers in the middle of each wall. When we stud the wall out it will be flush with the piers so creating a block room. The stud frame will be fixed to the floor and roof so there will be roughly a 25mm gap behind the walls. I am going to DPM the concrete pad internally and a few blocks up internally with DPM blackjack and have done so also outside a few blocks up. My question is can I DPM the whole internal blockwork? 
the outside will be painted with textured masonry paint and serve as a water barrier but will it do any harm if i DPM the whole inside blockwork?

 

you can see ive started but dont want to carry on unless advised its ok.

 

[Bonner]

I wouldn’t waterproof internally, ventilate the gap behind your stud wall and let it breath. If you seal both sides, any moisture that does get in won’t be able to escape and will tend to blow the coatings. 

[mazzlebizzle]

1 hour ago, Bonner said:

I wouldn’t waterproof internally, ventilate the gap behind your stud wall and let it breath. If you seal both sides, any moisture that does get in won’t be able to escape and will tend to blow the coatings. 

So I ended up only going 4 blocks up in the end. And will be a 20-25mm gap behind all stud walls ??