Airdrie Retail Park – A New Shop Front Screen
When a new veterinary practice moved into Airdrie Retail Park, the building needed to work...
Why aluminium flush casement windows?
Flush casement windows deliver a clean, contemporary profile that works equally well on modern new builds and period refurbishments. The sash sits perfectly level with the outer frame, producing uniform sightlines and a refined, uncluttered elevation.
Fabricated from precision-engineered aluminium systems by Smart and Cortizo, our flush casement windows combine polyamide thermal break technology with robust multi-point locking – giving you a window that performs as well as it looks, season after season.
Slim, architectural sightlines
Excellent thermal efficiency
PAS24 security as standard
Low maintenance, long life
- Colours
- Glazing
- Security
The Right Finish for Every Project
Choose from the complete RAL palette, dual-colour options with different internal and external finishes, or Smart's exclusive Sensations textured, Alchemy anodised-effect and metallic ranges - all applied as a durable, powder-coated finish that holds its colour for decades.
Anthracite Grey
White
Off White
Grey
Gloss White
Dark Red
Dark Grey
Dark Green
Dark Brown
Dark Blue
Cream
Brown
Black
Any RAL
Double or Triple Glazed to Suit Your Project
Our flush casement windows are available with high-performance double or triple glazing, delivering excellent thermal and acoustic insulation. Low-emissivity coatings and argon-filled units help achieve strong energy ratings across all configurations.
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Security Built into Every Window
Multi-point locking, concealed hinges and PAS24-rated hardware come as standard across our aluminium flush casement range - giving homeowners genuine peace of mind without compromising the window's clean aesthetic.
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The Perfect Window for Heritage and Modern Homes
Aluminium flush casement windows are a unique style – they replicate the flat, refined appearance of traditional timber windows while delivering the durability and thermal performance of modern aluminium. Whether you’re replacing ageing timber frames on a period property or specifying windows for a contemporary extension, the flush profile fits effortlessly.
Century 21 supplies and installs flush casement windows fabricated from Smart and Cortizo aluminium systems. The result is a window that beautifully blends the best of historic design and modern innovation.
Expert Manufacturing & Installation
Every flush casement window we install is fabricated using premium aluminium extrusions from Smart and Cortizo – two of the most respected names in aluminium fenestration. Combined with our experienced installation team, you get a finished result that is airtight, weathertight and built to last well beyond 35 years.
From your first enquiry through to final installation, Century 21 manages the entire process. Whether you’re an architect needing precise documentation and technical specs, or a homeowner requiring full supply and installation, our team can help.
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Our Process
Step 1
Enquiry
Get in touch with our friendly team and share the details of your project, we're happy to answer any questions and guide you through the next steps.
Step 2
Consultation & Technical Support
During our consultation, we offer technical support and work with the project architect to advise on the best systems for your project.
Step 3
Showroom Visit
Visit our showroom to see our range of products up close, and enjoy a one-to-one consultation to help find the perfect solution for your home or project.
Step 4
Quote
We'll provide a full, detailed quote tailored to your requirements, including survey and installation costs where needed, so there are no surprises.
Step 5
Installation & Aftercare
Our experienced, in-house fitting team will carry out your installation to the highest standard, with ongoing aftercare and advice available whenever you need it.
Frequently Asked Questions
Below we have answered some of the most common queries we receive from homeowners. If you can't find what you are looking for, get in touch with our team directly.
On a flush casement, the sash sits level with the outer frame when closed, creating a smooth, flat external face with equal sightlines - unlike a standard casement where the sash projects slightly proud of the frame.
Yes. Our aluminium flush casement windows feature polyamide thermal breaks and can be specified with double or triple glazing, achieving strong U-values that meet and exceed current Building Regulations requirements.
Absolutely. We offer the full RAL colour palette along with dual-colour options and Smart's exclusive textured, anodised and metallic finishes - so your windows can be tailored precisely to your property.
Our flush casement windows are manufactured to PAS24 security standards, featuring multi-point locking systems and robust hardware designed to resist forced entry - suitable for Part Q compliance on new builds.
Aluminium is corrosion-resistant and does not warp, rot or fade. With minimal maintenance, a well-installed aluminium flush casement window can last in excess of 35 years, making it a sound long-term investment.
Visit our Showroom and See the Quality in Person
Touch the products, explore the finishes and talk to our team before you commit to anything. We’re here to help you make the right decision for your home.
10 Bairds Crescent, Allanshaw Ind Est, Hamilton, ML3 9FD
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