Curtain Walling Calculator
Estimate costs, panel quantities, U-values and weight for aluminium curtain walling systems. Covers stick, unitised, structural silicone and point-fixed systems.
Total horizontal span
Total vertical height
Stick is most common for smaller projects
Triple glazing for enhanced thermal performance
Supply and install cost per m²
Opaque spandrel panels as % of facade
How We Calculate This
This calculator estimates costs, panel quantities and thermal performance for aluminium curtain walling facades.
The formula
Total cost = Facade area (m²) × Price per m² × Finish multiplier
- Facade area = width × height
- Panel count = total area ÷ typical panel size
- Weight = area × weight per m² (40-55 kg depending on glazing)
Part L compliance
- Limiting standard: 1.6 W/m²K
- Notional building: 1.3 W/m²K target
Frequently Asked Questions
Related Calculators
Window U-Value Calculator
Calculate window U-value from glass, frame and spacer thermal performance.
Double Glazing Unit Calculator
Calculate DGU thickness, weight per m² and thermal performance by gas fill.
Window Condensation Risk Calculator
Calculate window condensation risk from internal temperature, RH and dew point.
Sealant and Mastic Calculator
Calculate sealant cartridges from joint volume per window frame.
Window Security Spec Calculator
Determine PAS 24 window security requirements by floor and access level.
Last updated: March 2026
All calculations are estimates. Verify with your supplier.