Building Pathology Explained
Step-by-step 3D tutorials showing how the four primary defect mechanisms damage residential buildings. Each animation reveals the root cause — the first step to effective remediation.
How Rising Damp Works — Capillary Moisture Through Failed DPC
Ground moisture rises through porous masonry by capillary action when the damp-proof course has failed or is bridged. Watch how water migrates from foundation level upward, causing salt crystallisation, plaster degradation, and timber decay.
How Penetrating Damp Works — External Water Ingress
Rainwater penetrates the building envelope through defective flashings, failed pointing, or porous masonry. This tutorial traces the water path from a failed lead flashing through the wall cavity to internal damp staining.
How Condensation Forms — Dew Point & Thermal Bridging
Warm moisture-laden air contacts surfaces below the dew point temperature, causing water vapour to condense on cold walls and thermal bridges. This is a building fabric failure — not a lifestyle issue.
How Mould Grows — Cold Surfaces & Persistent Moisture
Cold bridges at wall-ceiling junctions drop surface temperatures below dew point. Persistent moisture above 70% RH enables Aspergillus niger spore germination within 48–72 hours.
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