The year changes the likely assembly.
Choose a regional construction era to see common systems, priority clues and the first context checks.
Traditional solid-wall buildings
Solid masonry, lime finishes, suspended timber floors and breathable material behaviour.
rain penetrationsubfloor ventilationincompatible render
Open era profile →UK-IE · 1919–1964Early cavity-wall era
Cavity walls, suspended floors, tiled roofs and later heating upgrades.
bridged cavitiesair-brick blockageroof underlay ageing
Open era profile →UK-IE · 1965–1999Modernisation and retrofit era
Changing insulation standards, sealed windows and widespread central heating.
ventilation reductioncavity insulation interactionsflat-roof ageing
Open era profile →UK-IE · 2000–presentContemporary UK & Irish homes
Tighter envelopes, engineered floors and increasingly complex ventilation strategies.
extract performanceinterface flashingthermal bypass
Open era profile →