Tree Root Barriers – Why Are They Important?
The root tree barrier can fulfil a number of different functions either linear or around the tree itself. It is better to install a tree root barrier when a tree is first planted so that the roots grow in the way they are intended to. Tree root barriers are designed to help protect a tree from invasive roots, prevent excessive moisture, and help stop nearby buildings and structures becoming damaged. In this blog post we will take a more in depth look at tree root barriers and the benefits of installing them.
Root Barriers prevent invasive roots
Root tree barriers are the most effective method of protecting your landscape from root invasion. Made of fine mesh like fabric or metals they stop tree roots from growing through them, while at the same time allowing water to get to the roots to promote growth. If not controlled then large roots can potentially cause substantial damage to pipes, foundations and landscaping. As a rule of thumb new trees should be planted at least 10 feet away from a building’s foundation .
Prevent excessive moisture
The installation of a vertical plastic membrane to act as a barrier is a straightforward way of ensuring the foundations of your building are well protected. The heavy duty plastic works as a barrier to tree root growth. Additionally this type of membrane can prevent the loss of moisture from the ground and stabilise reactive clay underneath your foundation. They are simple to install, and they can be used up to 18 inches below grade. One thing you must be aware of is that you need to leave a 3 inch space in-between the root ball and the barrier .
There are a number of different types of barriers available, with the pre-manufactured barrier being the most basic and affordable option. This type of barrier is constructed from durable polypropylene, typically ranging in thickness from 40 to 60 mil. The robust material is resistant to penetration, effectively preventing excess moisture from seeping through to the tree’s roots.
They Nourish the Rest of the Tree While it Heals
In order to thrive, tree roots depend upon a symbiotic relationship with soil microbes. The microbes generate white fungal threads known as mycelium whose function is to spread across the tree roots absorbing sugar from them. This in turn provides the tree root with essential minerals, a relationship known as a mycorrhizal network.
The roots of a tree are essential to its health and growth. In addition to providing anchorage , they are also the source through which the tree obtains nutrients and minerals needed to thrive. The roots direct these nutrients and minerals to where they are needed via a vascular structure .
They Prevent Structural Damage from Offending Roots
Tree root barriers are an ineffective solution when it comes to preventing the structural damage that tree roots can cause. They are most effective when used in the planting of new trees as no pruning of roots will be required. With a more mature tree there is a good chance that the roots will have to be pruned. This can be problematic as cutting roots too close to the trunk can destabilise the tree, possibly resulting in sparse foliage and ultimately the death of the tree .
There are different options available when considering root tree barriers. The most simple being a permeable mesh screen, this allows smaller roots and water to pass through while ensuring larger roots can’t penetrate it. Thicker root barriers can extend up to 36 inches below the soil surface. Studies on the effectiveness of root barriers in preventing structural damage have shown encouraging results. A study of 16 root barrier treatments undertaken in the Netherlands evidenced that the roots eventually evaded the barrier and returned to the soil surface .
They Prevent Invasive Roots from Growing Over the Barrier
Root barriers when used with mature trees are a great way to control and direct the growth of invasive tree roots. This type of root can be very disruptive, causing significant damage to structure, resulting in the need for costly and time consuming repairs. This type of barrier is made of high density flexible membrane which forms an impenetrable barrier to the tree root, helping prevent moisture loss and stopping the roots from spreading. They provide a cost effective solution to the problem of invasive roots .
Tree root barriers not only protect the aesthetic of your building, they also help to protect the environment. Invasive tree roots can cause damage to the general areas surrounding them , such as pavements and concrete. Invasive tree roots are not only unsightly but can be trip hazards for pedestrians. The use of a root tree barrier stops invasive roots becoming a nuisance and stops them having an adverse effect on any trees, shrubs and plants situated close by.
If you are looking for a reputable company to install tree root barriers for you contact the team here at HBB Geosales. Our professional team has wide ranging experience in the installation of tree root barriers around new and mature trees.