Sliding system

Sliding system

Sliding system

Our window and door systems give a modern aesthetic alongside minimal sightlines.

Allows up to a maximum glazing capacity of 34mm which can increase thermal and acoustic benefits.

  • Using CORTIZOs superior COR 4700 system.
  • Achievable U – Value from 1.1(W/m2K).
  • Maximum glazing thickness 34mm.
  • Achievable acoustic insulation Rw = 40Db.
  • Frame width 120mm.
  • Triple track width 180mm.
Opening possibilities
Up to 6 sashes

Uses either one rail or triple rail

Maximum dimensions per sash
Width = 2500mm

Height = 3000mm

Maximum weight per sash

* Consult typology, dimension and glass.

CORTIZO’s systems main benefits:

All of CORTIZO’s enclosing systems are tested in the Test Laboratory at the
Technological Center to guarantee the best performance in watertightness,
air permeability and wind loads, endorsed by the maximum results in its test

In order to transform the residence into a private space, intimate and free of
pollution outdoor acoustics, CORTIZO has designed its enclosing systems with
all the latest technological developments necessary to ensure indoors peace
and relax.

We create tailor-made windows and façades for every project. Creativity to
answer aesthetically and functionally to each demand. Aesthetic answers to
the technical needs. Creativity at the service of habitable environments.

Respect for the environment is CORTIZO’S commitment. Using innocuous raw
materials and products in all our manufacturing process and the limitless
possibility of aluminum recycling, allows us to remove any creation of waste
and environmental risks.

Nowadays energy efficiency in buildings is a demand made, both by the
architects, as by the final customer aware of the importance of saving on
heating costs and air conditioner. CORTIZO meets such challenge with
systems for every climatic area with a high insulation coefficient to ensure the
comfort in the residence.

The whole RAL colour chart in powder coating, exclusive powder coating,
metallic, textured , wood effect, more than 100 finishes in anodized.
Aluminum on the outside and wood in the inside, two-coloured finishes… An
unlimited offer to create a colour harmony at home. Quality labels in every

Aluminum is the most durable, long-standing and resistant material of those
used in enclosures. Aluminum has the strength and a durability of the things
that last a whole lifetime.

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If you encounter any issues with our products or services, please get in touch with us directly so we can address them promptly. Your satisfaction is our priority.


Bawan Annauth
Bawan Annauth
Fantastic job from start to finish!! Windows are look brilliant. Definitely using them for future windows. Highly recommended
Trevor Snoxell
Trevor Snoxell
We had some windows and bifold doors installed by AL in 2020, a minor issued developed (the door was catching on the bottom), I ran and spoke to a lovely lady who arranged for the owner to pop round the following day after their day job was complete. He took just under an hour and fixed the problem there and then. Thanks
Graeme Lennox
Graeme Lennox
great service and price, would happily recommend them
Keith Edwards
Keith Edwards
Excellent professional service to replace damaged draught insulation. Not only was the reported problem solved but the whole installation was then thoroughly inspected.
matt davey
matt davey
Really impressed with this firm. Very professional, efficient and friendly. Highly recommended 👌
Daniel Savin
Daniel Savin
We have used AL Windows multiple times now, the quality of their product and service is excellent. Highly recommend.
Paul Stobart
Paul Stobart
We needed to replace wooden casement windows on the 2nd floor of our old property in Swanage. These windows were encased in black painted frames with slate sides and an apex slate roof. All the house windows were painted green. It’s a period property circa 1800 with Georgian style sash windows on the lower floors. We wanted to make sure that new replacement windows would blend in with the other windows and maintain the period aesthetic of the property. However we didn’t want the ongoing maintenance associated with wood windows. I phoned AL Windows and spoke to a very helpful lady. She arranged an appointment for a visit by one of their team. A person came to measure up a few days later and we decided to go with plastic double hung windows; white on the inside and black on the outside. A L windows gave us an approximate delivery time of 3 weeks. They were actually fitted two and a half weeks later. The new windows blend in perfectly with the style of the building and look like they’re made from wood when viewed from the outside. From the inside they look very neat and tidy. We now have no unwanted draughts or water leaks. We are thrilled with the new windows. Thanks to the team at A L windows for your excellent work and for being extremely helpful. Paul Stobart
Aran Sherriff
Aran Sherriff
I have found the best local company for windows and doors. Highly recommend them. My family and friends have used them as well. Five stars from us!
P Gerrers13
P Gerrers13
I very rarely post reviews on anything but felt compelled to do so on this occasion - thanks to the great job done by everyone on the AL team. We had new patio doors and a window fitted and we are delighted with the outcome. They built trust right from the off. The visit to their production site was really useful and helped to see the work they were capable of. The back office worked very smoothly, with Sara very responsive to our requests. Most importantly, the product is excellent, good value for the quality, and the finished doors and windows better than we could have expected. The installation team were fantastic - they worked with care for the rest of our property, pace to get it done before the weather changed, and all with a really friendly and helpful attitude. All this was done in a very reasonable timeframe from order to fitting. Thanks again to the team - I would recommend anyone to use this great small business.

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