Slimline Aluminium Doors with Classic Steel-Look Design
Experience the perfect balance of heritage style and modern engineering with Smart Alitherm Heritage Doors.
Upgrade your home or renovation project with Smart Alitherm Heritage Doors, the ideal solution for creating a traditional steel-look aesthetic with modern aluminium performance. Perfect for heritage homes, listed buildings, and contemporary properties seeking a timeless style, these energy-efficient aluminium doors feature ultra-slim profiles, thermal breaks, and high-security locking systems.
Choose from a wide range of RAL colours and elegant hardware to match your architectural style. Designed for both internal and external use, Smart Alitherm Heritage Doors deliver style, security, and sustainability.







All available single colour or white inside
It is impossible to give a typical cost for Aluminium sliding doors due to the difference in size, colour, design and installation type. We are happy to visit, measure and provide a free no obligation quotation.
A simple wipe down is all it takes to keep the windows looking great for years to come.
Yes. Our doors come with Planitherm Total Low E glass, warm edge spacer bar technology and argon gas filled as standard meaning our clients get a highly energy efficient product. We can also offer a triple glazed option if and where required.
Again this can be size dependant but usually sliding doors are fitted and finished within one working day.
As with all products supplied and installed by 1st Glass Windows ltd we offer our fully comprehensive 10 year insurance backed Guarantee covering labour and materials.
At 1st Glass Windows we pride ourselves on our Aftersales support and industry leading guarantee. With this in mind we serve our local community to ensure our Service Department can maintain our high standards. The areas we cover are mainly Surrey, Kent and Sussex and include Biggin Hill, Caterham, Coulsdon, Croydon, Forestdale, Godstone, Horley, Kenley, Lingfield, Oxted, Purley, Riddlesdown, Sanderstead, Selsdon, Smallfield, Tatsfield, Warlingham, Westerham, Whyteleafe.