HomeBrowse CPD Providersillbruck – a brand of Tremco CPG UK Ltd Timber Frame Construction. Differential Movement – Considerations relating to window installation. illbruck – a brand of Tremco CPG UK Ltd Timber Frame Construction. Differential Movement – Considerations relating to window installation. Face to Face Seminar Sustainable architecture, Design, construction and technology Book Face to Face Seminar Add to favourites DescriptionThis seminar will discuss: - Timber frame - Timber considerations - Differential movement - Product applications - Weather tightness - Air tightness