ALUMINIUM WINDOWS
Slim frames. Big glass. Maximum light.
Aluminium lets us build window frames that are stronger and slimmer than uPVC — which means more glass, more light, and a sharper modern look. Whether it's a contemporary extension or a heritage steel-look replacement, there's a Smarts range that fits.
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ALUMINIUM VS uPVC
Should you spend more on aluminium?
Honest answer: not always. uPVC is the right call for plenty of homes. But if any of these matter to you, aluminium is worth the extra.
Slimmer Frames
Aluminium is a stronger, lower-density metal — so frames can be thinner and sashes larger. More glass, more light, less plastic in your eyeline.
Twice the Lifespan
Aluminium doesn't yellow, warp, or degrade in sunlight. With proper care, frames last roughly twice as long as uPVC equivalents.
Better U.Values
Modern thermally-broken aluminium outperforms uPVC on heat retention. The frames have a thermal break inside that stops heat transfer in its tracks.
Any RAL Colour
Powder coating means you're not limited to a small foil range — pick literally any RAL colour, single or dual (different inside/outside).
Higher Security
Aluminium frames are genuinely tough. Far harder to force than uPVC, with locking systems engineered to match.
~50%
More than uPVC
What about cost?
Aluminium typically costs around 50% more than equivalent uPVC. The trade-off is longevity and energy savings — for most clients it's a long-term play, not an everyday spec.
SMARTS ALITHERM 400
The everyday favourite
The Alitherm 400 is the range most clients end up choosing. Combines outstanding value with proper quality — and there's a sash style for almost any project, from new builds to refurbishments.
Modern square profiles, slim 81mm sightlines, double or triple glazed, and finished in marine-quality polyester powder coat for a finish that will outlast the rest of the house.
SMARTS ALITHERM HERITAGE
The steel window replacement
Original steel-frame windows are beautiful — until you actually have to live with them. They rust, they're cold, and they're a nightmare on listed properties when conservation officers want exact replacement.
The Alitherm Heritage range solves that. Designed specifically as a modern aluminium replacement for traditional steel — the same impossibly slim sightlines, with modern thermal performance and security.
HARDWARE
Add a touch of elegance
The standard aluminium handle does the job, but if you want to take it up a notch — the upgrade range covers everything from understated modern to proper heritage-style cast handles.
COLOURS
Standard finishes — or any RAL
Black, Anthracite Grey and White are the popular standard picks. Beyond those, Smarts also offer curated colour collections — and full RAL bespoke if you want something specific to match the rest of the property.
