Celotex Thermaclass Cavity Wall 21
(3 Products)Offering excellent thermal performance with a thermal conductivity of just 0.021 W/m.K, Celotex Thermaclass Cavity Wall 21 is the perfect insulant for cavity walls. The boards boast an engineered tongue and groove joint profile, ensuring a continuous layer of insulation and optimal thermal performance, as well as protection from wind-driven rain.
What Is Thermaclass Cavity Wall 21?
Celotex Thermaclass Cavity Wall 21 is built with a high-performance polyisocyanurate (PIR) core, secured between two sheets of low-emissivity foil facing for superior thermal performance.
The PIR foam core is renowned for its excellent thermal insulation properties, while the low emissivity foil facings provide a reflective surface that helps to reduce heat loss and maximise thermal performance.
The BBA has verified that Thermaclass Cavity Wall 21 is an ideal insulant for full-fill cavity wall applications, provided it is installed and maintained in accordance with the certificate's instructions.
Offering high flexibility, this product can be installed with either a 10mm residual cavity for easy installation and mortar squeezing, or as an entirely full-fill solution without any residual gaps whatsoever.
Please Note - Due to safety regulations, Thermaclass Cavity Wall 21 should not be employed in the external walls of buildings exceeding a height of 18 meters (England and Wales) or 11 meters (Scotland).
Where Is Thermaclass Cavity Wall 21 Used?
- Full fill cavity wall applications
Thermaclass Cavity Wall 21 Thicknesses
Frequently Asked Celotex Thermaclass Cavity Wall 21 Questions
Related Articles
Cavity Wall Insulation Installation
Cavity Wall Insulation Problems
