Thermally-broken aluminium frames in 70mm profiles - A-rated, RAL-finished, and built to outlast UPVC by a decade. Slim, sharp, contemporary, fitted clean.
Smart Systems and Senior Architectural authorised installer · PAS 24 tested · 10-year guarantee.
Aluminium windows are the modern answer to the slim-sightline question that timber used to own. Sharp lines, large glass panes, RAL-finished frames that hold colour for thirty years.
Aluminium done badly is worse than UPVC done well. Three failures dominate the cheap end of the market.
Older or budget aluminium runs cold and condenses water continuously in winter. Modern thermal breaks eliminate this - but only if the frame system is correctly specified.
Sub-grade powder coat fades and chalks within 8–10 years on south-facing elevations. AkzoNobel and Syntha Pulvin coatings hold colour for 25+ years.
Low-grade EPDM seals harden and crack within five years, allowing draughts and water ingress. Quality systems use TPE seals rated for 30 years.
Some installers fit 24mm sealed units to save money - but then the window only achieves a C rating. A-rated specification needs 28mm with low-E coating and argon fill.
We measure each opening, photograph the elevation, discuss RAL colour, opening configuration, glass spec and any structural reveals.
You receive: frame profile, RAL finish, glass spec, hardware, fitting and waste - itemised, with FENSA registration included.
UK manufacture from Smart Systems or Senior Architectural in 5–7 weeks. Specialist colours add 1–2 weeks.
Most full-house aluminium installs run 3–5 days. Room-by-room, sealed and finished as we go, FENSA-certified on completion.
Every opener tested, every gasket inspected, 10-year insurance-backed guarantee registered, FENSA certificate lodged within 30 days.
Maximum glass area for the opening size - significantly more daylight than UPVC equivalents.
Powder-coated to any RAL - anthracite grey, jet black, oxide red, custom matched to existing joinery.
Aluminium doesn't warp, swell, rot or fade in the way timber or budget UPVC can.
Thermally-broken frames with 28mm or 44mm sealed units deliver A-rated WERs and U-values from 1.2 W/m²K.
Aluminium handles single panes up to 3m² - picture windows that would be impossible in UPVC.
Square edges, slim mullions and no welded corners - the right look for contemporary properties.
Aluminium windows is a category covering five major frame systems and a hundred specification permutations. The right answer depends on the elevation, the planning context and the budget.
Smart Alitherm 300 for slim residential frames, Smart Alitherm 600 for high-rise and exposed elevations, Senior PURe SLX for ultra-thermal performance (Passivhaus compatible), and Senior Ali VU for heritage-look slim sightlines on conservation properties.
Any standard RAL colour as powder coat (AkzoNobel Interpon D2525), dual colour available (one finish inside, another outside), anodised finishes for bronze and champagne metallic looks, and textured 'Sablé' finishes for matt architectural projects.
Casement (top or side-hung), tilt-and-turn for upper floors and easy cleaning, vertical sliding sash for heritage and Edwardian properties, French casement pairs, fixed picture windows for maximum daylight, and structural bay window assemblies.
Standard 28mm low-E argon-filled double-glazed sealed units achieve A-rated WERs and 1.2 W/m²K. Triple-glazed 44mm units achieve A++ ratings and 0.8 W/m²K - typically specified on Passivhaus and self-build projects. Acoustic-laminated glass available for road-facing elevations.
Slim sightlines (70mm vs 110mm), larger pane sizes (3m² vs 1.5m² practical max), sharper colour finish (powder coat vs printed foil), longer service life (30+ years vs 25 years), and a more architectural finish. Aluminium loses on initial cost (typically 40–80% more than equivalent UPVC) - which is why a like-for-like decision depends on the property and the budget horizon.
If a question's missing, ring us - five minutes on the phone beats a brochure every time.
Free survey, no deposit on the day, no high-pressure sales script. We measure, advise honestly on the right specification and email a fixed price.
