—CASTLE WINDOWS FOR Aluminium & UPVC Systems
Thermal performance. Installation-ready geometry. No compromises.
Castle systems are spec-published and load-tested. Confirm thermal ratings, section geometry, and lead times before your next site meeting.
Choose your profile. Confirm your spec.
Structural sections for commercial and high-rise
Multi-chamber profiles with published U-values, powder-coat finish options, and coastal-rated durability. Geometry verified for direct installation without site modification.
Retrofit-proven profiles for residential and coastal sites
Six-chamber profiles with weatherseal ratings published. Handles salt-air exposure and tight retrofit tolerances without requiring hand-fitting on site.
Data you can put in a specification document
Uw 0.8 W/m²K
35-Year Load Test
15-Day Lead Time
Published whole-window thermal transmittance for aluminium triple-glazed units. Test certificates available without request.
Structural integrity verified under cyclic wind load across simulated decades of weather exposure. Results published in the technical data pack.
Standard profiles dispatched within 15 working days from confirmed order. Volume schedules confirmed at point of specification, not after.
Thermal data, test certificates, compliance documentation — all public.
Castle's full technical library is published without gating. Verify system suitability against your building regulations before raising a single purchase order.