Can we get laminate flooring despite poor damp proofing under the floor?

If you haven't done so already it's best to get a moisture reading of your subfloor. That will then clarify whether or not laminate flooring is suitable. A professional floor fitter should use a moisture meter prior to installing a new floor. Also as already stated that a underlay with a damp proof membrane (DPM) may help your situation. You can also consider using a liquid DPM. I hope this helps..

Don’t use a sheet membrane as that will cause more problems. Liquid DPM is the way to go.

Not my field however a company isn’t going to throw work away and advise you against getting work done unless they generally believe it will cause you drama down the road they will only speak from experience and what current guidelines are for building regs. It does sound plausible to me though however you need to ask your self this does your home have damp/mould around the bottom of walls and in the corners of the rooms if so then they are correct if not then maybe they’re being slightly over precautionary. If you really want it done maybe a good idea to get a few vent bricks installed just above ground level so that you know the floor below is vented and has air moving through it so if there is damp it will dry out. Another opinion maybe is ceramic floor tiles that look like laminate wood flooring because then if said damp does rise it shouldn’t cause any major issue? They also look really nice and in my opinion nicer then the laminated floor. I’d still wait for an actual floorperaon/groundworker/general builder to comment though they know best.

Hello, you can buy a moisture resistant underlay and you can also buy underlay with a built in damp proof membrane/ vapour barrier to keep moisture at bay. I hope this has helped.