Following on from another thread I posted recently, I’ve had a builder out to quote for the levelling and damp-proofing of my bitumen adhesive covered concrete floor. The damp levels in the current floor are marginal; some areas showed green on the builders damp meter, and others yellow. I’d prefer to err on the side of caution, and get a fresh DPM laid so I never have to worry about it again.
The builder has quoted for applying 2 coats of Everbuild Black Jack, followed by a layer of Arditex NA. I have a couple of concerns about this however. Firstly, I‘m not sure if it’s a good idea to mix products from different brands. My understanding was the recommended approach in my situation is the “Ardex Sandwich” with a thin layer of Arditex NA, their DPM 1C, then another layer of NA.
My other concern is I believe there is approximately a 2cm drop in the floor from one end of the room to the other, which I’ve worked out using a combination of laser and tape measures:
Based on this, I’m struggling to see how either a) their 3mm layer is going to make any meaningful inroads in levelling the floor, or b) how the DPM sandwich could work, given I understand that even though Arditex NA can work at higher thicknesses, the layers need to be quite thin when applied on top of bitumen, and again on top of their DPM?
The builder has quoted for applying 2 coats of Everbuild Black Jack, followed by a layer of Arditex NA. I have a couple of concerns about this however. Firstly, I‘m not sure if it’s a good idea to mix products from different brands. My understanding was the recommended approach in my situation is the “Ardex Sandwich” with a thin layer of Arditex NA, their DPM 1C, then another layer of NA.
My other concern is I believe there is approximately a 2cm drop in the floor from one end of the room to the other, which I’ve worked out using a combination of laser and tape measures:
Based on this, I’m struggling to see how either a) their 3mm layer is going to make any meaningful inroads in levelling the floor, or b) how the DPM sandwich could work, given I understand that even though Arditex NA can work at higher thicknesses, the layers need to be quite thin when applied on top of bitumen, and again on top of their DPM?