Derwent Sash Windows Ltd t/a Derwent Windows and Doors

We have used Derwent Sash Windows to replace all our original Sash windows, and their quality of work, product and service was excellent. The windows themselves look amazing and feel really substantial. The fitters not only did a great job putting the windows in, but they also left everything really tidy, the mess was cleaned up - unlike other tradesman we have had in - we cannot fault them on any level. These windows have been worth every penny, we highly recommend them.

A good experience from the initial visit to their excellent showroom, through the measuring and fitting. By no means the cheapest, but the windows are the best that I have seen, and the only ones which suit our old house. Widows look to be well made, it remains to be seen how they stand up to the weather since they were only fitted today, however, I have no reason whatever to doubt them.

We are very pleased with the installation of Evolution Storm windows. We followed Jan and Rob's advice on some of the detailing and the windows look great inside and out. The finish is spot on and the fitting team were tidy, efficient and cheerful. Thank you!

Not the cheapest quote but quality windows, excellent service and polite and efficient installation, Would use again.

Would happily recommend Derwent Sash Windows. Very professional and tidy job from start to finish. Thanks to all involved.

From start to finish Derwent Sash Windows took great care of our home with the minimum of disturbance to our decor We chose the Evolution flush fit range in grey Amazing quality Windows fitted with care they have transformed our home Rob and his team are the most professional company around give them a try if you want new quality Windows

We had our upstairs windows replaced by Derwent last year and everything about the process has been first class. The products are excellent, the workmanship of a very high standard and we absolutely delighted with the results. People have been stopping us in the street as we leave the house to ask us about our lovely new windows. From our initial enquiry through to the end of the installation we couldn't fault anything and look forward to returning for the rest of the windows as soon as possible.

Rob and Alistair are very friendly, helpful and knowledgeable. The quality of the windows and the fitting service is excellent. The joinery work on the reveal linings and architraves is superb. The attention to detail, care of our home and cleanliness is first class. We highly recommend Derwent Sash Windows and would never use anyone else.

Derwent Sash have replaced every window in our Edwardian house and the original conservatory. This is not a regular window installation company, these guys are craftsmen. We took 3 quotes, all fairly similar...it is only when you get into the weeds on the detail of the window and the subsequent fit and finish internally and externally that you realise you have found the only company to trust your home with. The other 2 companies eventually withdrew their offers as the job was too difficult. A guy down the road used a regular window installer, same windows, crappy fit and finish, especially externally. Ours was a big job, huge original casements and sash windows were removed and replaced with Bygone Collection Sash and Evolution Casements. That was the bit anyone could do. The level of carpentry detailing to replicate window sills, architraves and plenty of other bits was astonishing. The conservatory was a rotten, leaky and cold a lean to, now it is the pride of the house, lovely and warm. We had a special extra wide Accoya door made to replicate the original. The whole things looks identical, but much better than the one next door. So we have a period house, now with the latest technology windows, installed stunningly. Noise reduction glass in the bedrooms kills all outside noise and the house is finally warm. And it looks just like it did before, Use them, trust them, they are worth it.

Once again Rob, Alistair and their excellent workmen have come up trumps! We cannot praise them enough. This time we had twenty two sash windows replaced, the first time it was twenty. The installation was completed with the absolute minimum of fuss and disruption. From our first contact to book the work to the last squirt of sealant everything was done to perfection. The lads on site were cheerful, polite and expert at what they did. By the end they felt like part of our family! Many thanks to all concerned. Never mind recommending this company to friends we would insist they use you!! Since completing the window replacement, Derwent have replaced our old porch, and are about to replace all our external gates and doors. We are certain that they will do a tremendous job, as they always have.