Structural Surveys & Repair

A structural survey for a period property should go beyond standard building surveys to assess the building's structural history and behaviour. This includes understanding original construction methods, identifying alterations made over time, and evaluating any movement, cracking, or settlement in context. Period buildings often show evidence of historic movement that has long since stabilised - an experienced surveyor can distinguish this from ongoing problems. Survey findings inform decisions about purchase, maintenance priorities, and the need for any specialist intervention.

Damp in period properties is complex because traditional buildings were designed to manage moisture differently from modern construction. They use breathable materials - lime mortars, soft bricks, and permeable renders - that allow moisture to evaporate safely. Most damp problems in old buildings result from inappropriate modern interventions: cement renders, gypsum plaster, non-breathable paints, and raised external ground levels. A proper damp survey diagnoses the actual cause rather than relying on surface moisture meters. Treatment addresses the root cause, often involving removal of modern materials and restoration of breathability, rather than injected chemical damp-proof courses.

Subsidence occurs when the ground beneath foundations moves downward, typically due to clay shrinkage during dry weather, tree root activity, or washing away of soil. It causes diagonal cracking, often worse around windows and doors. Not all cracking indicates subsidence - settlement (downward movement under the building's weight) and heave (upward movement of clay soils) have different causes and solutions. Investigation typically involves monitoring crack movement over time, trial pits to examine foundations, and sometimes soil analysis. Treatment may range from tree management to underpinning, depending on the cause and severity.

Underpinning strengthens or extends existing foundations, usually to address subsidence or allow deeper excavation nearby. Traditional mass concrete underpinning involves excavating beneath existing foundations in short sections and filling with concrete. Modern alternatives include mini-piling and resin injection. The choice depends on ground conditions, access, and the building's construction. Period properties require careful assessment - their shallow foundations and lime mortar construction differ from modern buildings, and inappropriate underpinning techniques can cause more problems than they solve.