Celotex GA4000 is an easy to install polyisocyanurate (PIR) insulation board with excellent thermal performance, featuring a low emissivity foil facing. Available in thicknesses from 50mm to 100mm, it can be considered for roof, wall and floor applications.
U-value CalculatorStart your U-value calculation >
- Ground Floor - Concrete Slab
- Ground Floor - Suspended Timber Joist
- Ground Floor - Beam and Block
- Ground Floor - Upgrading Existing Concrete Slab
- External Wall - Timber Frame Internal Linings
- External Wall - Timber Frame Sheathing
- External Wall - Between Timber Frame Studs
- External Wall - Solid Masonry Internal Linings
- Pitched Roof - Over Timber Rafters
- Pitched Roof - Sarking
- Pitched Roof - Below Timber Rafters
- Pitched Roof - Between Timber Rafters
- Pitched Roof - Loft insulation - Between and Over Timber Joists
- Flat Roof - Balconies & Terraces Over Joists
- Flat Roof - Between Timber Joists
- Flat Roof - Below Timber Joists
- Lightweight 2400 x 1200mm boards
- Low emissivity foil facing
- Achieves a BRE Green Guide A rating
- BBA certified – certificates 16/5352 (Timber Frame Dwellings), 17/5405 (Pitched Roof, Dry Lining, Floor Insulation)
- Board / Roll size: Width 1200mm, Length 2400mm
- Thickness : 50-100mm
- Material: PIR
- Lambda: 0.022 W/m.K
- Reaction to Fire: Euroclass E Reaction to Fire classification, according to BS EN 13501-1. Products with this level of classification are not provided with a rating for smoke emission.
- Excellent thermal performance with a thermal conductivity of 0.022 W/m.K, reducing the thickness of insulation required to hit the target U-value.
- Low emissivity foil facing provides improved thermal performance in sealed cavity air spaces, improving the achievable U-value.
- Easy to install – Celotex boards are light and rigid assisting with ease of transportation, handling and fitting.
- BBA certified - Celotex GA4000 has been assessed by the BBA as fit for use in defined roof, wall and floor applications if installed, used and maintained as set out in the certificate. Please read the certification for full details and restrictions.
- Celotex GA4000 achieves a BRE Green Guide Rating of A, which can assist in demonstrating environmental performance in your BREEAM assessments. Please visit the Celotex page at greenbooklive.com for further details.
When using Celotex GA4000, you need to satisfy yourself that use of the product meets all relevant national Building Regulations and guidance as well as local, national and other applicable standards relevant for your construction or application, including requirements in relation to fire and applicable height restrictions.
Please refer to the following product documents:
Celotex GA4000 should not be used in the external walls of buildings over 18 metres in height (England and Wales) or 11 metres in height (Scotland). Recent changes to Building Regulations mean that only non-combustible insulation or insulation of limited combustibility can be used in buildings of that height.
Applications: Click here to discover applications
- Floors - Ground Floor - Concrete Slab
- Upgrading Existing Concrete Slab Floor
- Floors - Ground Floor - Beam and Block
- Walls - External Walls - Timber Frame
- Floors - Ground Floor - Suspended Timber
- Roofs - Pitched Roof - Sarking
- Roofs - Pitched Roof - Between and Over Rafters
- Roofs - Pitched Roof - Between Rafters
- Roofs - Pitched Roof - Between and Under Rafters
- Roofs - Pitched Roof - Loft Insulation
- Roofs - Flat roof - Between and Under Joists
- Roofs - Flat roof - Balconies and Terraces