2026/27 STATUTORY & COST AUDIT • ICO REG ZC136598
Guardian Warm Roof vs SupaLite Tiled Conservatory Roof: 2026 UK Engineering & Cost Comparison
Which is better in 2026: a Guardian Warm Roof or a SupaLite tiled conservatory roof?
Both Guardian Warm Roof and SupaLite are LABC/JHAI pre-approved structural lightweight aluminium conservatory roof systems achieving a 0.15 to 0.18 W/m²K U-value. Guardian uses a ventilated twin-deck plywood/kingspan build (£335–£355/m² installed), whereas SupaLite uses an ultra-lightweight breathable membrane and Tapco/ExtraLight tile assembly (£325–£345/m²) ideal for older uPVC side frames.
| Specification Metric | Guardian Warm Roof System | SupaLite Tiled Roof System |
|---|---|---|
| Thermal U-Value (England/Wales Part L) | 0.15 W/m²K (0.12 W/m²K Scotland) | 0.15 W/m²K |
| Structural Frame Weight | ~41 kg/m² (Pre-Engineered Aluminium) | ~36 kg/m² (Ultra-Light Aluminium) |
| Turnkey Installed Cost (15m² Edwardian) | £5,850 – £6,600 (inc. Plaster & LEDs) | £5,600 – £6,350 (inc. Plaster & LEDs) |
| Building Control Pre-Approval | LABC & JHAI Registered System | LABC & JHAI Registered System |
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