Many people worry about the long term costs and safety of buying a house with subsidence. Subsidence refers to unstable building foundations which cause parts of the structure to slowly sink downwards. As with all building issues, levels of subsidence vary greatly, with home owners having to endure great costs and distress in more severe cases. If you are a landlord, subsidence is never a welcome sign for functional property management, so if you suspect your property has subsidence or the problem is getting worse, spotting the signs early may help you avoid larger worries down the road.
Causes
The most common causes of subsidence are due to geological, natural causes. Clay soils are a common culprit for the problem as they lock in moisture for long periods of time which then causes it to expand. Once dried, it then shrinks, making the foundations of a building unstable. These soils are usually found along river banks so the location of your property can be a crucial factor in subsidence risk. Look for signs of subsidence after a long wet or dry spell. Tree roots can also dry out this clay and create a problem to a structure as the roots grow out of control. This accounts for more than half of all subsidence cases so it is important to maintain or chop down a large tree close to your property. Uneven soils also add to the issue, especially in areas which witness earthquakes and tremors on minor and major fault lines.
Spotting subsidence
The key thing you should look for when spotting signs of subsidence are cracks. It can sometimes be hard to differentiate a subsidence crack to one which has been the simple result of time and seasonal changes such as frost. Look for interior and exterior cracks which taper diagonally downwards across wall surfaces. Another sign is to look for changes in wallpaper. Once you have ruled out damp as the cause, subsidence should be the next worry. Many cracks are hidden by wallpaper, so as the levels of your walls shift; ripples and hanging corners may appear in the paper. If these signs are spotted, also test your doors and windows in their frames to check for alterations. Unfortunately, monitoring your house for subsidence can be a lengthy process which is frustrating as the sooner the problem gets sorted, the less money and time you will have to spend on treating the problem.
How to treat subsidence
Actually treating the problem of subsidence can be the most lengthy and distressful stage of the whole process if the issue goes unnoticed for some time.
The process of underpinning the entire structure may have to be implemented in the most severe cases which can cost homeowners thousands of pounds. The majority of properties with subsidence will not need to be fixed with such extreme lengths but it is always best to get your home thoroughly assessed. Although underpinning is a costly fix, the likelihood of subsidence is usually minimal, which will help towards insuring your property. Insuring a property with subsidence can be arduous although there are now many comparison websites which research the best deals for you.
In terms of tree roots, you will need the advice of an expert as to whether removing the roots from under the property will be a quick solution or a detriment to the project. Over the years, major root networks will have shifted the soil to create space. Once the roots are taken away, this space may soon fill up with water, which will add to your structural problems.
Another cause of unwanted water under your home is a burst or leaking pipe. Once this problem is determined, mending this can be a quick fix.