Prokil were suggested by friends and after their first visit and detailed report, I felt confident to approve them to work on our grade 2 listed building. When work started, their site team were very professional and friendly, both of their guys explained what they were doing and why. Once exception- holes were made. They explained in detail the best solution and finish for our walls, in this case, a waterproof membrane with a plasterboard/plaster finish. I will be contacting Prokil again when we start on the kitchen and cellar, we hope we get the same team, I would recommend this company.