External walls form the largest surface area of the building’s thermal envelope and the correct specification of insulation can help towards meeting the energy performance requirements of the building. We manufacture a range of insulation solutions for both rainscreen cladding and masonry overcladding systems.
U-value CalculatorStart your U-value calculation >
When using Celotex or ISOVER products, 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. In addition to the product datasheet, please refer to the following product documents:
- BBA certificates - where applicable to the application
- Declarations of Performance
- Health & safety datasheets
Celotex products should not be used in the external walls of buildings over 11 metres in height. Recent changes to Building Regulations mean that only non-combustible insulation or insulation of limited combustibility should be used in buildings of that height.