Transcription of Retrofit Internal Wall Insulation
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September 2021 Retrofit Internal Wall InsulationGuide to Best PracticeTechnical authors from Enhabit: Dr Sarah Price (lead), Elena Andreou, Tim Wilcockson, Konstantinos Megagiannis, Nuria Lopez2 Contents Glossary .. 3 1. Introduction .. 5 2. Benefits .. 8 3. Building Regulations .. 9 4. Building suitability assessment & risks .. 11 5. Materials .. 25 Material Conformity .. 25 6. Design Principles .. 27 Thermal bridging .. 27 Airtightness layer .. 29 Moisture management .. 29 Joist ends .. 32 Ventilation .. 32 Interaction with other measures .. 32 Less than 100% IWI installation .. 33 Services and penetrations .. 35 7. Installation .. 36 Pre-installation survey and risks .. 36 Design principles for installers.
managers and installers considering the suitability of external walls to receive internal wall insulation. This guide may be used to assess viability of internal wall insulation or systems (IWI), the design of internal wall insulation, selection of materials including hygrothermal aspects and installation best practice.
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