Large cracked walls are usually a sign that the foundations of the building have weakened. These cracks may
begin to form around windows, doorways or corners of the building. Thinner, hairline cracks are usually a
sign of less significant issues that may need so be patched and repainted.
Why are larger cracks appearing?
This is usually a sign of weakened foundations, this has then lead to the building sinking into the ground.
This is known as subsidence and it may be caused by issues with the soil underneath the building becoming
too wet or too dry.
Keep a close eye on cracks that appear, if they become larger then it is a sign that action needs to be
taken to avoid significant damage.
Solutions for cracked walls
At SAU, we provide solutions for both domestic and commercial properties with cracked
walls. Regardless of
the size of the project, our team of experts are on hand to provide effective and long lasting support to
Experts at SAU will carry out an initial inspection of the property to identify the cause of the cracked
walls. Once a plan has been drawn up, work will begin immediately.
If the cracked walls are caused by problems with the foundations, it is usually the case that the property
will need to be re-levelled. At SAU, we employ modern and effective approaches to re-levelling. This
approach is superior to traditional concrete underpinning methods, and is far less invasive.
Once re-levelling work has been carried out, large cracks will close as the property is raised, leaving only
hairline cracks that are then patched and painted.
Treatment for cracked walls
The treatment for cracked walls that is caused by subsidence involves the re-levelling and strengthening the
ground under the building. As the foundations are re-levelled the cracked walls will close up and the
remaining cracks can be easily repaired.
Usually this process, known as ‘underpinning’ involves excavation of the foundations to allow for pouring of
concrete. This process can be extremely costly and time consuming, with projects often taking weeks and
months to complete.
At SAU we do use a modern approach to underpinning which does not involve any excavation of the site,
instead our resin injection method is far more efficient and less costly. Without the need for excavation,
the time taken to repair the foundations is a fraction of what it would be with traditional underpinning,
and there is no need for customers to vacate the building as work is completed.