Verified by manufacturer 20 days ago
90 mm thick
A polyisocyanurate (PIR) insulation board featuring a tongue and groove edge profile. Can be considered for full fill cavity wall applications.
Thermaclass Cavity Wall 21 is an easy to install, polyisocyanurate (PIR) insulation board for full fill cavity wall applications, with excellent thermal performance (0.021 W/m.K). Featuring a low emissivity foil facing, it can be installed with up to a 10mm residual cavity (to support ease of installation and accommodate mortar squeeze) or as a full fill solution with no residual cavity.
Product Features
Fire Classification
Euroclass F 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.
Product Benefits
Key Considerations
When using Celotex Thermaclass Cavity Wall 21, 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 Thermaclass Cavity Wall 21 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.
Color | Silver Cream |
Finish | Foil |
Material | Polyisocyanurate (PIR) Guidance for specification option: Polyisocyanurate |
Shape | Rectangle |
Length | 1190 mm |
Width | 450 mm |
Uniclass | |
CAWS | F30/10 Full fill cavity insulation F30/150 Full fill cavity insulation |
Standard | To BS EN 13165.Guidance for specification option: Declaration of Performance (DoP): UKCA Marked to BS EN 13165. |
Third-party certification | BBA approved 16/5343; UKCA Marked; ISO 9001; ISO 14001.Guidance for specification option:
|
Fire performance | Euroclass F 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. |
Thermal conductivity (maximum) | 0.021 W/m·K.Manufacturer guidanceDeclared thermal conductivity, according to BS EN 13165 for factory made rigid polyurethane foam (PU) products. |
Compressive strength at 10% deformation | Manufacturer's standard.Guidance for specification option: Consult manufacturer for details. |
Cross section | Uniform thickness. |
Thickness (nominal) | 90 mm. |
Face size (length x width) | Manufacturer guidanceInsert requirements. |
Density | Manufacturer's standard.Guidance for specification option: Consult manufacturer for details. |
Recycled content | Manufacturer's standard. |
Facing | Foil. |
Edges | Tongue and groove. |
Thermal resistance | 4.25 m²K/W. Manufacturer guidanceR-value. |
Handling | Manufacturer's standard. Manufacturer guidanceInformation regarding storage, installation and handling of Celotex products, or health and safety information, can be found on the manufacturer's website. |
Country of product manufacture | United Kingdom |