At ATW, we invest a lot time and money into research, to get quality focused processes and high end materials, that ensures the absolute best possible is achieved; as if every product was being made for our own house.

We do not focus on how quickly and easily we can finish our products as most competitors do, and we always spend the extra time getting EVERY DETAIL RIGHT.

What makes us different from the others:

  • We give you a superior Safety Glass, so you get Laminated glass for the same price as Toughened glass.  Laminated is more sound efficient and harder to break through.
  • Efficient service. Most quotes are returned to you in 24 hours.
  • The quality of wood we use (without knots)
  • The precision and accuracy of our joinery to prevent the use of fillers/putty
  • Superior engineering process to eliminate warping or bending
  • 3 star high security cylinders used on every door possible – no one has broken in through our doors
  • High security door parts (Winkhaus hook bolt locking systems) used to keep you safe
  • Superior glazing process with Butyl tape and silicone to prevent leaks
  • Every component used is for maximum energy efficiency possible
  • Factory spray finished – 4 coats of Water Based Microporous paint, to protect your investment for as long as possible (or a choice of Oil based protection)
  • Our over-the-top packaging ensures our products arrive in pristine condition
  • Our attention to detail ensures you get what you asked for and to prevent misunderstandings we will send you technical CAD drawings.
  • We provide you with old fashioned honest service by the same people from start to finish so you don’t get fobbed off from department to department.
  • We have grown significantly since we started operating independently in 2006. Considering this was the start of a financial crisis our growth through this period, is a very good indicator about the quality of our products, our service to our customers and of course the fact that we are good value for money. We are proud of our growth in this time; and without salesmen!
  • Also, we are relatively small and we want to stay this way, too many people cause too many problems and unnecessary complications, with ATW, you deal with the same people from start to finish, not numerous different departments. This allows us to give you quick and efficient service.
  • In house designers – to advise and help with design improvements of products and customers projects. We are here to help advise so you succeed with your projects.
  • We are genuine and honest people with your interests at heart and we know that if you succeed then we also succeed.

Satisfied Customers

Steve Haylett, TN11

“Awesome products unrivalled quality very impressed every time.”

Sam Roberts, E7

“Had 6 sash windows installed in the front of the house, still looking great after nearly 3 years. Superb quality and delivered on time.”

Lilly, MK16

“Hi Mia,

I hope you are well.
Thank you so much for your help with our door, we love it. It looks very nice and finishes off the room perfectly.


Terrance M, SE19

“Having used other manufacturers in our 20 years experience Authentic Timber Windows have not only got the best prices, but also deliver the best quality of windows and doors. As installers we can highly recommend ATW, and we are looking forward to many more years of effective collaboration to come.”

Premier Windows, SE19

“We’ve been dealing with ATW for almost 10 years now. Brilliant customer service, quick turn around and reasonable prices. Most importantly the products are of the highest quality! Would definitely recommend to anyone looking for timber windows and doors.”

Mr. Sidney, SE15

“A big Thank you!

We are very pleased with our new front door and now feel much safer. It is of great quality & very solid. We live in a conservation area so we will also need some timber windows soon as well.”

Nick Gautama, SW2

“Your company has proved to be a real winner.

I had windows done in the past with another company and, I was very disappointed. Once bitten twice shy!

Of course I was wary at first with using another company but you really have provided the quality I needed.

Excellent service and accurate delivery time too!

Regular communication and updates on my order and keeping me in the loop was extremely important and you certainly delivered there too. I would not hesitate to recommend you, and I will definitely be using you again on my next project.”

Andy, CR 8


Thanks for e-mail.

Yes, I received the door knocker but haven’t tried it on the door yet.

Fingers crossed it will be OK.

Many thanks for your promptness in sorting out the problems.

Hope you have a Merry Christmas, and Happy New Year.


Neil Commerford

“Thanks Steve,

Yeah, getting there, plasterers start next week, so windows and doors to go in this week.

The first set of bi-folds look great, very pleased with them!”

Jen R, E7

“We got two beautiful timber doors, double glazed sash windows, a fixed timber window and bay windows from Authentic Timber Windows are we absolutely love them. They are flawless, and just make such a huge difference to the appearance of the house. There’s not a single nick or brushstroke that we’ve spotted. They make a HUGE difference to the temperature of the rooms versus the double aluminum windows they replaced, too. The manager even helped us design a window above the door, with the print of the house number, and a little sunrise design in timber which makes the house look really elegant (we think!).


The staff were quick to reply and update us of everything we needed to know. They helped us choose what we needed up front, too, in terms of styles and handles etc. – be warned there’s lots to choose from!”

Sara Lang, SE15

“Very pleased with our new Sash Windows.”

Hannah Marden-Jones, SE17

“I am very happy with the bifolding doors and Sash windows we just got from Authentic. The finish is beautiful- very pleased.”

Natalie Pantic, SW16

“We could not be happier with our new Bi-Fold doors, not only was delivery on time but we have finally found a company that likes to keep you updated on the progress and the quality is excellent. We have a few more windows that will need replacing so will definitely be in touch again in the near future. 

Thank you.”

Dean Wilcox, DU12

“We have used ATW numerous times as our main supplier for timber products. Their quality is exceptional. Service and communication are excellent, Mia is a pleasure to work with, a very professional company throughout.”

Cole Sitton, EN9

“Hi Steve,

Good to see you the other day.

Pacheco’s doors look stunning and client is very happy.”

Trevor Pickering, SW16

“Hi Helen,

I have now received and installed my doors.

I am VERY impressed with the quality of the product and the paint finish is outstanding.

I would not hesitate to use your company in the future


Philip Owler

“Dear Mia,

I’m happy to pay the additional cost and so very grateful that you raised the question of the gaskets. It would have been a disaster if it wasn’t noticed until after we had installed them.

Thank you so much for your help with this, I’ve used many different timber window manufacturers before I found ATW and you are without doubt the best, you’re always helpful and professional and nothing is ever a problem that can’t be resolved.

Kind Regards

Philip Owler”



Thank you for the door and window, we are really pleased and a very nice driver delivered them for us. I must say we are really pleased to work with you it is a real pleasure.


Natalie Gollop, N1

“Just a quick note to say how over the moon we are with quality and finish of our windows. My husband has never seen such fabulous wooden windows and we are over the moon with service and quality. We will also recommend to all our customers who do not have PVC.

Thanks and regards”

Michael, SO12

“Hi Steve

We have been dealing with ATW for the last three years and we have received superb service and products as well as help from you all, especially Helen.  Your products are excellent and well liked by all our customers. We look forward to trading with you for many more years.

Michael Pocock Sales Director Cathedral City Windows Ltd.

Kind regards”

Neil C, SL 3

“Definitely consider speaking with ATW if you are looking for wooden doors/windows.

We had 2 x bi-fold doors, french doors and a kitchen window made.

I must say you can feel the quality when you open them, and the finish exceeded expectations. we went for the wood stained to an oak finish and they do look like oak, (spare stain included should you need it, we didnt).

Its transformed the look of our house and its fantastic having both sets of doors open in the summer months.”

Alan, Ultralux Windows Ltd, TW2

“ATW are positive, friendly, professional, honest, providing reliable service and high quality. We feel it is like doing business with our friends. Ultralux Windows and ATW have a strong working relationship and we are delighted to have found a business partner who put themselves out for us.

I would have no hesitation in recommending ATW and to have found a joinery works who manufacture quality products has added to our business possibilities and we can with confidence quote for the installation of high quality timber windows and doors knowing that our supplier will deliver on time.

We are finishing today a ATW timber conservatory with solid swept heads and finished in white and it is stunning.

Ultralux has been installing windows, doors and conservatories since 1969 and we think that ATW is a quality business partner.”

Registered address

Authentic Timber Windows Ltd,

2 Fauna Close,

Stanmore, Middlesex,