When determining the probable cause of crack formation, we may be dealing with a stable crack ; damage that has not developed further (caused by shrinkage and creep) or an unstable crack ; damage that is developing further (e.g., due to foundation subsidence). In these cases, the cause must first be eliminated before a proper repair can be carried out.
Bending masonry can be caused by a lateral force on the masonry or by a bending force.
Cavity ties secure cavity walls together, providing significantly greater stiffness than two separate cavity walls.
As mentioned above, a wall must be sufficiently stiff to withstand buckling loads. If there are no, too few, or poor-quality cavity wall ties (e.g., no stainless steel), the outer and inner leaves of the cavity wall will no longer be properly connected, compromising the wall's stiffness. If the wall is then subjected to excessive buckling loads, damage will occur.
When a cavity wall tie rusts, it loses its strength and function. Rust can occur due to poor-quality materials (not stainless steel) combined with moisture in the cavity.
Various causes of moisture in walls
Repair of insufficient or rusty anchors: After the cause has been addressed, repair and installation of new anchors is possible.
The cost of a building inspection (up to 250 m²) is only €489 including VAT. We'll conduct a comprehensive building inspection and you'll receive a building report. Do you have any questions? We're happy to help and can schedule an appointment with an expert inspector right away if you wish!
