Assessment and repair of structural timber

Assessment and repair of structural timber

Date Published

15 August 2022

Document Type




Repairs become necessary when a building is no longer safe or serviceable for its intended purpose, or to restore or improve its appearance, performance or function.

Timber structures can be repaired using traditional all-timber methods, mechanical fasteners and adhesives, but only following survey and assessment that take account of the structures condition and intended use.

Historic structures demand appraisal by specialists. Their advice about the scope and extent of any survey will lead to significant savings in construction time and cost. Their specialist knowledge of non-destructive techniques will minimise disruption and allow the inspection to proceed with the minimum of opening up works during the preliminary phase of the building investigation.

Key Information

The purpuse of the structural assessment in to determine the potential for the various parts of the structure to continue performing satisfactorily. It will provide the basic information needed to decide wheter or not repairs are required

Structural assessment covers strength, stability, serviceability, durability, appearance and accidental damage.

Repairs may be classified broadly in three groups: traditional methods, mechanically fastened methods and adhesive methods.

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Case studies

This elegant house stands on a ridge in Sussex looking out over the South Downs, whose distant hills are reflected in the undulating surfaces of the cross-laminated timber (CLT) roof.

A unique timber bridge, a combination of stress-laminated arches and screw-laminated deck, crosses the River Ribble in remote moorland near Ribblehead in the Yorkshire Dales. Far Moor Bridge is far from any road; it is designed for horses, cyclists and walkers who take the Pennine Bridleway, a new National Trail in the north of England.