Building bespoke cover for drainage system

I have a bare concrete floor in a ground-floor side extension, and there’s a drainage system in place (likely for moisture/water runoff). The room is the coldest in the house, even with a radiator.

I’d like to install laminate flooring, but I want to know the correct way to prepare the floor in this situation. Can insulation be added under the flooring to help with the cold, and if so, what type would be suitable over concrete with potential moisture?

Would I need a damp-proof membrane, specific underlay, or a subfloor system? Are there any concerns about moisture affecting laminate in this kind of space?

Or would a different type of flooring be more suitable? Please note this is for a wheelchair user and a carpet is unsuitable.

Asked by Melissa on 30th Mar 2026
No answers have been submitted yet
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