InteriA Internal Wall Insulation System

Wetherby Wall Systems’ InteriA is a high-performance Internal Wall Insulation (IWI) system designed for solid wall and retrofit projects where external insulation is not viable. Powered by Rockwool stone wool technology, it delivers excellent thermal and acoustic performance, A1/A2 fire classification, and breathable, moisture-managed construction. Suitable for heritage, residential, and social housing applications, InteriA enhances energy efficiency, occupant comfort, and compliance with Building Regulations and PAS 2035, while maintaining building character.