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.

Leave Us Your Review

Share Your Experience

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.


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.
briony wood
briony wood
Everyone in the company can’t do enough to make sure that the final products lives up to your expectations. They are prompt at answering any queries, they are on time and very approachable. My bifold doors and sliding window were complicated to measure up and fit but they were all very knowledgeable and keen to find the best solution possible. The product is good quality, fitted well and sealed/finished perfectly. I would highly recommend them on their products and customer care
James Tice
James Tice
In searching for new Bi Fold doors I have become a bit of an ‘arm chair expert’ on them. It’s appears there are loads of companies out there doing Bi Folds but on closer examination this was not the case. The majority of companies will offer them but will in fact order them in from a third party manufacturer. As a result costs and time lines are increased. Not AL Windows though. AL make them in house meaning they were circa £1.5k cheaper than the nearest like for like quote. Not only this but I paid the deposit on the 1st or March and they were installed on the 23rd of March (a good 12 weeks quicker than the above mentioned quote). All this was done with a great customer service throughout the process. A massive shout out to Sara for putting up with my many MANY questions. Can’t recommend these guys enough.
Douglas Hayward
Douglas Hayward
I can’t speak too highly of AL Windows. Our bifold doors are expertly installed, look fantastic and the support and advice we have received are outstanding. I thoroughly recommend the company.
Andrew Monro
Andrew Monro
Could not recommend Al Windows more highly - they were a pleasure to deal with, listened to what we wanted and advised us what was feasible for our project.
Jenny Newland
Jenny Newland
Brilliant from start to finish! We ordered 2 sets of aluminium bi-folds for an extension. The quality of the products fitted is excellent. The service was professional and totally painless. The fitting team were so friendly, punctual and knowledgeable. They got both sets up in such a short time. I would highly, highly recommend this company without hesitation. I cannot seem to write a 2nd review but we liked our experience so much that we asked them to come back and replace our windows, and fit some new ones to a garage conversion! We had exactly the same excellent experience which proves consistency. The team were friendly, tidy and respectful of working around us within our home. Still highly recommend AL windows. They are easy to deal with, great on price and service, fantastic attention to detail and lovely people.
Sue Sweeney
Sue Sweeney
Great front door and excellent customer service. Wouldn’t hesitate to use again.
Amanda Young
Amanda Young
AL windows replaced my windows today on a Weekend . Great price too . They were efficient clean and tidy and my windows are amazing . Thank you so much

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