Research and analysis

Resistance to moisture in buildings

This research investigated the moisture resistance of typical constructions in both new buildings and where insulation is retrofitted to existing buildings. 

Documents

Research into resistance to moisture in buildings: research summary

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Identification of common types of construction

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Using calculation methods to assess surface and interstitial condensation

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Using numerical simulation to assess moisture risk in new constructions

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Using numerical simulation to assess moisture risk in retrofit constructions - Part 1

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Using numerical simulation to assess moisture risk in retrofit constructions - Part 2

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Assessment of current moisture guidance

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Simplified rules

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Details

It is a requirement of Part C of the Building Regulations that buildings, and people who use these buildings, are adequately protected from harmful effects of moisture.

The Ministry of Housing, Communities and Local Government commissioned PRP to carry out this research study. There were two key aspects to the project: 

  • to verify the robustness of the guidance presented in Approved Document C for new buildings in the light of changes to Part L and to identify gaps in the current guidance

  • to develop a set of relevant guidance for situations where insulation is retrofitted to existing buildings

Published 16 July 2019