BASIX recognises the following roof types:
Flat ceiling and pitched roof
- Pitched roof (slope > 10°) with roofspace
- Flat/horizontal ceiling
Raked ceiling / Pitched or skillion roof
- Pitched or skillion roof (slope > 10°)
- Ceiling lining parallel to roof
Flat ceiling / Flat roof
- Flat roof (slope ≤ 10°)
- Flat/horizontal ceiling
Tip: Providing roof insulation will reduce your ceiling insulation requirements.
Last updated: 06/05/2025