Spring into 10% off
windows & doors.
London's premium uPVC & aluminium installer. Fixed-price quote within 24 hours, fitted by Apex's own teams. FENSA-protected.
Get a free quote on windows, doors & roofs
Select a product you're interested in to begin:
Our windows.
Casement Windows
Classic side or top-hung opening. A++ energy rated, PAS 24 secure, 1.2 W/m²K U-value.
Flush Sash
Heritage-style flush fitting that sits flat in the frame. Ideal for conservation areas and period homes.
Tilt & Turn
Dual-action: tilt inward for ventilation or rotate fully for cleaning. 0.84 U-value option.
Sliding Sash
Vertical sliding sash with tilt-in cleaning. Modern thermal performance in a traditional silhouette.
APX Casement
Cortizo Cor 70 ultra-slim aluminium with thermal break. Maximum glass area, minimum frame.
APX Heritage Steel-Look
Crittall-style aluminium with welded corners and authentic glazing bars. Period aesthetic, modern thermals.
Our doors.
X-Fold 120
Apex flagship bifold with 120mm sightlines. The slimmest bifold profile on the UK market. 0.97 U-value.
APX20 Ultra Slim Slider
Industry-leading 20mm interlock, the slimmest sliding door profile available in the UK.
APX Heritage
Steel-look aluminium doors with period-correct proportions and contemporary weather sealing.
Schueco AS FD 75/90
German precision bifold with concealed hardware. RC2 security, 1.0 U-value, made in Bielefeld.
APX47 Patio Slider
Ultra-narrow 47mm outer frame, flush threshold, electric operation available. Up to 2500mm wide.
French & Composite Doors
Front and back door options in composite, uPVC or aluminium. PAS 24 secure, A-rated thermal.
Save 10% on your full installation.
Book your free survey this month and get 10% off your full window or door installation. T&Cs apply.
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Reasons to choose Apex.
1 Multiple Styles & Materials
uPVC and aluminium across casement, sash, tilt & turn, flush, heritage, bifold, sliding and roof systems. Mix and match across an entire property. Every Apex install is bespoke to your home.
2 PAS 24 Security
Multi-point locking, laminated glass options and Secured by Design hardware on every window and door. Schüco AWS 70.HI achieves RC3 burglar resistance, the highest residential rating in the UK.
3 A++ Energy Efficiency
U-values from 0.84 W/m²K on premium aluminium and 0.93 on uPVC tilt & turn, well below Building Regs Part L. Lower heating bills, fewer draughts, year-round comfort.
4 10-Year Guarantee
10 years on workmanship, 10 years on the frames, 12 months on installation defects. FENSA-protected, so your guarantee is honoured even if Apex changes hands.
5 FENSA Accredited (Reg 40373)
Every install is registered with FENSA, so no Building Control fees for you and no compliance worries when you sell. We're also members of the GGF (Glass & Glazing Federation).
Recent projects.
Built for London homes. Conservation & new builds.
Whether you're replacing sashes in a Victorian terrace or fitting structural glazing in a contemporary extension, Apex spec's the right system for your home and handles the planning details.
Heritage & conservation areas
Run-through horns, deep bottom rails, period-correct profiles. We work with conservation officers across Richmond, Chiswick, Kingston and Wandsworth on planning-compliant glazing.
Aluminium vs uPVC: what suits your home?
Aluminium for slim sightlines, big openings and modern aesthetics (Cortizo Cor 70, Schüco AWS). uPVC for traditional homes, lower budgets and the best inherent thermal performance (Liniar 70mm). We help you decide on the survey.
Custom colours & finishes
Any RAL colour on aluminium, anthracite/foiled timber-effect on uPVC, dual-colour options (different inside and out). Heritage cream, sage, and Victorian black all stocked.
FENSA certificate & what it covers
Every install registered with FENSA (Reg 40373). No Building Control fees, certificate issued within 5 working days, full insurance-backed guarantee covering parts, labour and compliance.
Trusted by 6,340 London homeowners · FENSA registered · fully insured
