John and Nick have undertaken three separate pieces of work for us, and each has been completed to an extremely high standard and finish. John has taken time to assess and discuss options with me, and I have a lot of trust in his opinion. In a couple of cases he advised against undertaking work as unnecessary, and he made sure that the sources of the problems were fully identified and rectified. Both are extremely professional and have kept me updated throughout. I would have no hesitation in recommending them, from initial consultation through to completition of the job. Knowlegable, professional and hard working.