Installing wall ties in existing construction

Document Status

Current

Supplement

Core Supplement

Series

Digest

Abstract

Techniques have been developed since the 1970s for the reinstatement of cavity walls by inserting new wall ties without recourse to demolition and reconstruction. This digest describes the range of techniques and the associated hardware that are available. It deals particularly with cavity walls that either have been damaged or have lost their connection between the leaves as a result of the corrosion of steel wall ties. The methods described are also applicable to a range of related situations where ties are to be inserted; for example, tying back new walls to cross walls, repairing subsidence damage, stabilising collar jointed* and faced walls, tying back cladding walls to frame structures and tying back walls that have been cut for openings or movement joints. *Collar jointed walls: two parallel single-leaf walls, with a space between not exceeding 25mm, filled solidly with mortar and so tied together as to result in common action under load.

Author

de Vekey, R. C.

History

Replaces - BRE Digest 257.

ISBN

9781860814051

Subjects

• Wall ties
• Building structure
• Walls/masonry/cavity walls

Publisher History

BRE is a building science centre that generates new knowledge through research. This is used to create products, tools and standards that drive positive change across the built environment. BRE helps its government and private sector clients meet the significant environmental, social and economic challenges they face in delivering homes, buildings and communities. BRE is owned by the BRE Trust, a registered charity. The Trust uses the profits made by the BRE companies to fund research and education that advances knowledge of the built environment.