Thermaclass Cavity Wall 21
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Thermaclass Cavity Wall 21 Thermaclass Cavity Wall 21 is an easy to install, high thermal performance polyisocyanurate (PIR) insulation board for full fill cavity wall applications, with a thermal conductivity of 0.021 W/m.K. 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. The boards have a low emissivity foil facing to each side and feature an engineered tongue and groove joint profile, helping to ensure a continuous layer of insulation to maximise thermal performance...

Key Considerations When using Thermaclass Cavity Wall 21, you need to satisfy Thermaclass Cavity Wall 21 should not be used in the external yourself that use of the product meets all relevant national walls of buildings over 18 metres in height (England and Building Regulations and guidance as well as local, national Wales) or 11 metres in height (Scotland). Recent changes and other applicable standards relevant for your construction to Building Regulations mean that only non-combustible or application, including requirements in relation to fire and insulation or insulation of limited...

1205mm (Gross - including tongue) 465mm (Gross -including tongue) 1190mm (Net - installed) FIGURE 1A -BOARD DIMENSIONS 40mm FIGURE 1C -TONGUE PROFILE FIGURE 1B -groove PROFILE Edge Profile Dimensions Board thickness mm (A) 90 115 140 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.

Brick outer leaf, fair-faced block inner leaf* Block type & lambda Product thickness Dense Medium Lightweight Aircrete Brick outer leaf, block inner leaf, plasterboard on dabs internal finish with skim* Block type & lambda Product thickness Dense Medium Lightweight Aircrete Rendered dense block outer leaf, fair-faced block inner leaf* Block type & lambda Product thickness Dense Medium Lightweight Aircrete Rendered dense block outer leaf, block inner leaf, plasterboard on dabs internal finish with skim* Block type & lambda Product thickness Dense Medium Lightweight Aircrete *Based on 10mm...

SAINT-GOBAIN CELOTEX Lady Lane Industrial Estate, Hadleigh IP7 6BA Customer Service -Order Placement and Enquiries Tel: 01473 820820 Email: iukcustomerservice@saint-gobain.com Technical Support Centre Tel: 01473 820850 Email: technicalsupport@saint-gobain.com insulation-uk.com Published date: May 2021 Document reference: 001-376 Celotex reserves the right to amend or revise product specification without notice. The information in this publication is correct at the time of publication. The information herein should not be read in isolation as it is meant only as guidance for the user, who...