Suitable for full and partial fill cavity wall applications:

• Walls - external wall insulation - full fill masonry cavity walls.

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

• Thermal conductivity of 0.021 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 (based on a residual cavity of 10mm).
• Sized to fit standard cavity wall tie spacing. They are light and rigid, assisting with ease of transportation, handling and fitting.
• BBA Certified - Thermaclass Cavity Wall 21 has been assessed by the BBA as fit for use in defined full fill cavity wall applications if installed, used and maintained as set out in the certificate. Please read the certification for full details and restrictions.

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:

• Product Datasheet
• BBA Certificate
• Declaration of Performance
• Product brochure
• Health & Safety Datasheet

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.

Suitable for full and partial fill cavity wall applications:

• Walls - external wall insulation - full fill masonry cavity walls.

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

• Thermal conductivity of 0.021 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 (based on a residual cavity of 10mm).
• Sized to fit standard cavity wall tie spacing. They are light and rigid, assisting with ease of transportation, handling and fitting.
• BBA Certified - Thermaclass Cavity Wall 21 has been assessed by the BBA as fit for use in defined full fill cavity wall applications if installed, used and maintained as set out in the certificate. Please read the certification for full details and restrictions.

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:

• Product Datasheet
• BBA Certificate
• Declaration of Performance
• Product brochure
• Health & Safety Datasheet

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.

Suitable for full and partial fill cavity wall applications:

• Walls - external wall insulation - full fill masonry cavity walls.

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

• Thermal conductivity of 0.021 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 (based on a residual cavity of 10mm).
• Sized to fit standard cavity wall tie spacing. They are light and rigid, assisting with ease of transportation, handling and fitting.
• BBA Certified - Thermaclass Cavity Wall 21 has been assessed by the BBA as fit for use in defined full fill cavity wall applications if installed, used and maintained as set out in the certificate. Please read the certification for full details and restrictions.

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:

• Product Datasheet
• BBA Certificate
• Declaration of Performance
• Product brochure
• Health & Safety Datasheet

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.

Celotex Thermaclass Cavity Wall 21 is a rigid thermal insulation board made of PIR foam, featuring a low-emissivity foil facing. It can be installed with up to a 10 mm residual cavity (to support ease of installation and accommodate mortar squeeze) or as a full-fill solution with no residual cavity.

Features and benefits:

• Lightweight 1190 x 450mm boards (installed dimensions).
• Tongue and groove edge profile.
• Low emissivity foil facing.
• BBA certified.
• Good thermal performance.

Celotex Thermaclass Cavity Wall 21 is a rigid thermal insulation board made of PIR foam, featuring a low-emissivity foil facing. It can be installed with up to a 10 mm residual cavity (to support ease of installation and accommodate mortar squeeze) or as a full-fill solution with no residual cavity.

Features and benefits:

• Lightweight 1190 x 450mm boards (installed dimensions).
• Tongue and groove edge profile.
• Low emissivity foil facing.
• BBA certified.
• Good thermal performance.

Celotex Thermaclass Cavity Wall 21 is a rigid thermal insulation board made of PIR foam, featuring a low-emissivity foil facing. It can be installed with up to a 10 mm residual cavity (to support ease of installation and accommodate mortar squeeze) or as a full-fill solution with no residual cavity.

Features and benefits:

• Lightweight 1190 x 450mm boards (installed dimensions).
• Tongue and groove edge profile.
• Low emissivity foil facing.
• BBA certified.
• Good thermal performance.