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Terraced / row house

House type affects access to exterior walls, shared boundaries, drainage routes and how structural changes can be carried out.

Updated 2026-08-30
This is a construction profile, not a claim that every building of this type has the same problem.

Short answer

For this construction type, first check outside ground level and load-bearing support and stability. The actual conditions determine which solutions and risks are relevant.

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Sources and evidence

Method & sources →

Source types stay separate: technical and authority-adjacent sources support rules and risk topics, while project sources document practical experience.

2 technical/authority sourcesUpdated 2026-08-30

What should be checked

1outside ground level
2load-bearing support and stability
3drain and sewer levels
4condition of the substrate

How the investigation changes

Photograph the whole area and close-ups; note approximate building age, wall/floor construction, outside ground level and when the symptom changes. If water is involved, record whether it follows heavy rain, snowmelt, showering or is present continuously.

The decision changes with moisture source, structural condition, available height, drainage level, intended room use and whether the work affects load-bearing construction. Treat a product choice as the final step, not the first.

Typical points of attention

Rapidly growing cracks, active water, structural movement, sewage backflow or extensive mould deserve a more cautious assessment before finishes continue.

Structural, electrical, plumbing, geotechnical and health-critical work can require qualified professionals and local approvals.

Evidence & moderation

Editorial policy →
WHO guidelines for indoor air quality: dampness and mouldWorld Health Organization↗Eurocode 7: Geotechnical designEuropean Commission Joint Research Centre↗

Relevant guides

Damp basement walls: find the cause before choosing a repairWater through the basement floorHow to document a basement problemEfflorescence and salts on basement wallsMeasuring basement moisture: a useful log, not just one numberDrying a basement after water damageBasement storage and moistureMonitoring basement humidity

Problem scenarios

Basement still damp after new drainageBasement floor wet but walls dryA basement crack is getting widerCracks appear after basement excavationWater at exterior basement stairs

Technical terms

Dew pointEfflorescence and salts on basement wallsHydrostatic pressureMonitoring basement humidityRelative humidity

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Continue in the same topic

Related guides, problems, checklists, cases and technical terms from the same knowledge area.

GuideBasement storage and moisture→GuideDamp basement walls: find the cause before choosing a repair→GuideDrying a basement after water damage→ChecklistDamp basement inspection checklist→ScenarioBasement feels damp and cold but humidity readings look normal→CaseBasement flooding after heavy rain: pumping and perimeter drainage→ProblemCondensation / summer damp→ProblemCracks or movement→ProblemDamp or wet wall→ScenarioBasement floor wet but walls dry→
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