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Celotex Thermaclass Cavity Wall 21

Verified by manufacturer 20 days ago

90 mm thick

Celotex Variant:

A polyisocyanurate (PIR) insulation board featuring a tongue and groove edge profile. Can be considered for full fill cavity wall applications.

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Application

  • Walls - External Wall Insulation - Full Fill Masonry Cavity Walls

Description

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

  • Lightweight 1190 x 450mm boards (installed dimensions)
  • Tongue and groove edge profile
  • Low emissivity foil facing
  • BBA approved – certificate 16/5343 (Full Fill 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 Performance - Excellent thermal performance with a thermal conductivity of 0.021 W/m.K, reducing the thickness of insulation required to hit the target U-value.
  • High Performance Facer - 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).
  • Easy to Install - The boards are 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 at insulation-UK.com/BBA 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.

General information

Color

Silver

Cream

Finish

Foil

Material

Polyisocyanurate (PIR)

Guidance for specification option:

Polyisocyanurate

Shape

Rectangle

Length

1190 mm

Width

450 mm

Uniclass

Pr_25_71_63_66 Polyisocyanurate (PIR) foam boardsPrimary

CAWS

F30/10 Full fill cavity insulation

F30/150 Full fill cavity insulation

Specification data - Polyisocyanurate (PIR) foam boards

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:

  • BBA approved for full fill cavity walls - Certificate Number 16/5343.
  • SGS: Manufactured under Quality Management System. BS EN ISO 9001 - Certificate Number GB91/504.
  • SGS: Manufactured under Environmental Management System ISO 14001 - Certificate Number GB11/83526.

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 guidance

Declared 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 guidance

Insert 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 guidance

R-value.

Handling

Manufacturer's standard.

Manufacturer guidance

Information regarding storage, installation and handling of Celotex products, or health and safety information, can be found on the manufacturer's website.

Sustainability data

Country of product manufacture

United Kingdom

Literature

Thermaclass Cavity Wall

Thermaclass Cavity Wall

Thermaclass Cavity Wall TDS

Thermaclass Cavity Wall TDS

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