Slim sliding doors

New triple glazed slim sliding door

The Ultraline slim sliding door is unmatched in terms of design, performance and security, and is now available with triple glazing for increased levels of thermal performance.

The new triple glazed slim sliding door offers a u-value of 0.7 W/m2K for those looking to reach passive house standards. While the double glazed version can achieve a u-value of 1.2 W/m2K.

The heat loss from your home is measured in u-values, the lower the u-value, the more energy efficient the glazing is. The latest building regulations specify glazed doors within new build properties require a u-value of 1.6 W/m2K or lower. Whereas replacement windows require a u-value of 1.4 W/m2K or lower.

In terms of appearance, both the triple glazed and double glazed versions look the same. With slim sight-lines of just 20 mm throughout the visible system, for minimal interruptions and a contemporary appearance. Triple glazed door panels can be specified up to 5.4m2 in size, whereas double glazed version can reach sizes of 9m2.

The Ultraline doors features a state-of-the-art electronic locking systems, helping to make it one of the most secure doors on the market. Achieving PAS24:2016 standards.

Aspect Windows are the approved Ultraline installer for the Southwest. With the door on display in our Exeter showroom.

If you are thinking about triple glazing or slim framed aluminium sliding doors for your next project, give the team a call on 01392 444233 (option 1). Or book a showroom visit to discuss your requirements and see and experience the doors in person.

Ultraline slim sliding door - Aspect Windows showroom


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"The whole process has been excellent - I really appreciate the patience you've taken on what is a huge expenditure for a passion project, working with total amateurs! You've always taken the time to answer questions, explain options and crucially, make recommendations when nativity/inexperience clouds our judgement. A real skill and something I personally have really appreciated as I feel confident that we now have windows and doors that complement our house, design and style. Without that level of consultative engagement and relationship I'm confident I would have overlooked details and made a substandard decision. Thank you!"

Mrs Trestain, Padstow

"Just a quick note of thanks to the whole team for our fab windows and doors, we are delighted with both the product and also with the whole fitting process. The lads were brilliant (it's not often you get trades in the house who leave it cleaner at the end of the day than when they arrive in the morning!!) and just quietly got on with the job. Thank you again"

Mr & Mrs Leonard, Exeter

"The pocket sliding door and gable look amazing, it’s an impressive bit of kit and it’s a revelation to be able to open the space up! I have to say we’ve been very impressed with all your teams positivity, professionalism and workmanship, from start to finish - so a big thank you…"

Mr Marsh, Exeter

"I would like to thank you for the quality of the service we have received from Aspect Windows and commend you for the care and attention that we have received throughout the process. I am thoroughly pleased with our new windows and would recommend your services to anybody who asks."

Mr & Mrs Miller, Exmouth

"I wanted to just send my thanks and appreciation. We had an install approx. 6 years ago including some bi-fold doors which in recent weeks appeared to have dropped and became very difficult to lock. I called the office on Monday and a lady took my details and quickly called me back suggesting you had an engineer locally the following day. He arrived and was extremely polite and efficient and diagnosed a broken hinge. He went back to the depot collected the replacement part, then returned to Budleigh and completed the repair. We really appreciate the speed and efficiency with which you dealt with the issue and the ease from a customer perspective. "

Mr Ashby, Budleigh Salterton

"I just wanted to say thank you for the excellent service you have provided in the planning, removal & installation of our beautiful new windows and doors. We were completely amazed & delighted at the speed of which the installation took place and the hard work put in by the installation team. They worked very efficiently and communicated with me at ease through the week so I knew their plans with each room for installation. All the windows & door look great and we have already had lots of compliments. "

Mrs Oakes-Ash, Exmouth

"We would like to thank everyone at Aspect Windows for the fantastic service that we have received on our project. From start to finish, you have been so professional and we are totally thrilled with our sliding doors and our side door. We would not hesitate to recommend you to anyone thinking of undergoing a similar project."

Mrs Moores, Templecombe

"We would just like to say how excellent the service has been from Aspect Windows from beginning to end. The salesman could not have been more helpful, we felt completely unhurried and un-pressured. The fitter was also extremely good, he was neat, careful and very respectful of our property as well as being very sociable and polite. Congratulations Aspect Windows on a really good job I wish everything in life could be so straightforward!"

Mr Foster, Exeter

"I had chosen Aspect Windows in Exeter to supply the glazing as they had a good reputation and specialised in aluminium doors windows and curtain walling. Aspect were brilliant throughout the design and fitting process, working to incredibly tight tolerances especially on the curtain walling."

Mr Abdilla, Exeter