Early walls - Wattle and Daub -- Classic 15th century timber framed construction -- Measuring moisture in old timber frame buildings -- Detecting insect infestation -- Solid masonry walls - importance of breathability -- Lime mortars -- Blocked cavity trays - extreme interior mould caused by blocked cavity wall -- Types of cavity ties and problems with them -- Geophysical surveys -- Why walls fail: vegetation, subsidence, heave, over-hydration -- High silica bricks -- Diagnosing damp walls: limitations of moisture meters, hydrosticks, salts test, calcium carbide test, chemical analysis -- Real causes of damp -- Damp sources - bridging the DPC -- Damp sources - gutters and downpipes -- Damp sources - hidden waterworks -- Monitoring condensation -- The EIFS system - interstitial condensation -- A new system for monitoring damp -- The problem with modern timber-framed building methods

This DVD looks at the construction of various types of walls, with a strong emphasis on finding the correct causes of damp. Includes case studies.