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Thermal insulation THERMACLASS
polyisocyanurate (PIR) foamrigid panelexterior

thermal insulation
thermal insulation
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Characteristics

Type
thermal
Material
polyisocyanurate (PIR) foam
Format
rigid panel
Location
exterior
Use
wall
Technical characteristics
high-performance
Fire Class
Euroclass E
Options
lightweight
Thermal conductivity

0.021 W/(m.K)

Thermal resistance

0.25 m²K/W, 5.45 m²K/W, 6.65 m²K/W

Thickness

90 mm, 115 mm, 140 mm (3.54 in)

Length

450 mm (18 in)

Width

1,190 mm (47 in)

Description

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 and provide protection from wind driven rain. Applications External Walls – Full Fill Masonry Cavity Wall Product Features Lightweight 1190x450mm boards (installed dimensions) Tongue and groove edge profile Low emissivity foil facing BBA approved – certificate 16/5343 Product Properties Board / Roll size: 1190x450mm (installed) 1205 x 465mm (including tongue) Thickness : 90-140mm Material: PIR Product Performance Lambda: 0.021 W/m.K Reaction to Fire: Euroclass E Reaction to Fire classification, according to EN 13501-1 (Products with this level of classification are not provided with a rating for smoke emission) Product Benefits 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. Low emissivity foil facing provides improved thermal performance in sealed cavity air spaces, improving the achievable U-value. 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.

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