Alitherm 400 Windows
Smarts Alitherm 400 aluminium windows. PAS24 approved, WER A+ rated and fully compliant with Part L of the Building Regulations.
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Browse Our Aluminium Window Systems
From contemporary casements to heritage-style flush sash windows, Midland Aluminium supplies the full Smarts Systems range. Choose the right system for your project below.
Flush Sash Aluminium Windows
Clean, contemporary flush sash aluminium windows from Smarts. Trade-priced, PAS24 approved and delivered free across the UK.
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Heritage Aluminium Windows
Steel-Look heritage aluminium windows with slim sightlines and outstanding thermal performance. PAS24 approved and supplied direct to trade.
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Why choose Midland Aluminium
We've built our reputation on doing the basics brilliantly. Fast quotes, reliable delivery, genuine trade pricing and products that perform. Here's why installers and builders across the UK keep coming back to us.
Quotes Within 24 Hours
Send us your spec and we'll have a competitive quote back to you within 24 hours.
Fast Lead Times
Lead times start from just 7 days on bifold doors and 2–3 weeks on most aluminium products.
National Distribution Network
We run free weekly delivery routes across the UK, delivering direct to your site.
Concealed Ventilation Technology
Our flush windows feature a concealed hood vent for discreet, effective ventilation without compromising on appearance.
Heritage Systems
We offer wood-effect Timberlook windows and heritage Steel-Look window and doors to help installers capitalise on the demand for heritage.
Comprehensive Product Range
From bifolds and flush windows to internal glazing — we supply everything you need from a single, reliable trade supplier.
Your Questions Answered
Not sure which product is right for your project, or want to know more about how we work? Here are the answers to the questions we get asked most often.
Midland Aluminium supplies three aluminium window systems from Smarts Systems — the Alitherm 400 casement, the Smarts flush sash and the Smarts Heritage 47 . Between them, they cover every project type from modern new builds to sensitive period refurbishments.
Yes, in particular the steel-look Steellook range from AWG has been designed specifically for period and heritage properties, replicating the slim sightlines and traditional proportions of original steel windows. It is an ideal choice for conservation area projects, listed buildings and any property where a sympathetic, heritage-appropriate window is required.
Our aluminium windows can be powder coated in virtually any RAL colour, giving you an almost unlimited choice of finishes. Dual colour options are also available, allowing the inside and outside of the window to be finished in different colours. This makes aluminium windows an extremely versatile choice for both contemporary and traditional projects.
Yes. Our aluminium windows are designed to meet current UK security standards and can be specified to comply with PAS24 and Secured by Design requirements. Combined with high quality hardware from trusted brands, they deliver a strong level of security performance across every installation.
Simply get in touch with the Midland Aluminium team by phone or email and we will get a quote back to you within 24 hours. We supply direct to trade across the UK with free delivery available nationwide.
