Published November 16, 2025 | Version Draft Version – November 2025
Journal article Open

Post-Retrofit Moisture Risk in Solid-Wall Buildings: A Case-Based Study of Birmingham Homes

Authors/Creators

  • 1. De Montfort University, Leicester, UK
  • 2. The Retrofit Academy, UK

Description

This article investigates the moisture risks associated with post-retrofit solid-wall homes in Birmingham. Using two case studies—one in Smethwick (internal wall insulation) and one in Edgbaston (external wall insulation)—the study explores failures in design, installation, and ventilation, supported by thermal imaging and WUFI modelling. The article follows PAS 2035 and BS 5250 guidance and offers practical recommendations for future retrofit coordinators.

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Hamed Esmaeili- Article-Retrofit-Moisture-Risk_Case-Study_2025.pdf.pdf

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Additional details

Dates

Available
2025-11-16
This case-based study investigates the post-retrofit moisture risk in solid-wall buildings in Birmingham, UK. The paper focuses on two real case studies: one involving internal wall insulation (IWI) in a Smethwick terraced house with timber floors, and the other examining external wall insulation (EWI) on a 1930s semi-detached home in Edgbaston. Using thermal imaging, relative humidity sensors, and WUFI simulations, the study identifies causes of moisture failure such as insufficient ventilation, thermal bridging, and incorrect detailing. The paper aligns its findings with PAS 2035 and BS 5250 guidance, offering practical recommendations to avoid similar risks in future retrofits. This research contributes to improving quality and safety in UK domestic retrofit.