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The monitoring of wall moisture in a property retrofitted with internal wall insulation (IWI)

August 3 @ 12:00 pm - 1:00 pm

Presented by Clementine Walker MEng, Development Laboratory Manager at Safeguard Europe Ltd

The current objective of UK energy policy is to reach zero emissions by 2050 from all use in buildings. The adoption of insulation to reduce heating demand is key to reaching the target. Solid walls in particular offer a challenge to insulate. As of December 2018, only 9 % of solid walls had insulation compared to 70% of cavity walls. Poorly designed, specified or installed insulation can lead to problems with moisture build-up and mould. The application of IWI has been found to increase the moisture content of the exterior wall [4,5]. Modelling by the Ministry of Housing, Communities & Local Government determined that solid walls with IWI were one of the riskiest retrofit build-ups, with the main risk being from penetrating rain.

This case study investigated whether or not using a waterproofing masonry cream could protect IWI from wind driven rain and so make this a safer option. A solid wall property having internal wall insulation (IWI) installed, was monitored for moisture over an 8 year period. One half of the front wall was treated with a waterproofing masonry cream whereas the other half was left untreated. The house was monitored using data loggers measuring moisture content (WME), temperature and relative humidity (RH) over an 8 year period after the installation of IWI. The house was in a moderate exposure zone for penetrating rain.

The full results of the study will be presented in this webinar, with questions and discussion encouraged. This will be a longer version of the talk given at ICMB21.

Clementine Walker will be running a webinar about the project at 12:00 on Tuesday 3rd August


August 3
12:00 pm - 1:00 pm
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Clementine Walker