Did you know?
One of the least considered causes of raised and distorted pavers is the tree roots. Roots also put pressure on the soil when they grow out in search of moisture and nutrients, which may cause paving stones to move, and the base layer to be weakened. Fortunately, root-related paving can be avoided in a practical manner and a level outdoor area can be preserved.
Why Tree Roots Lift Pavers
Roots of trees are naturally inclined towards the moisture, nutrients and loose soil. The ground under pavers is usually loose and well drained, which makes it an appealing rooting medium. The expansion and thickening of roots drive the soil to the surface, altering pavers to move, crack or create hazards.
Trees such as oaks, maples and figs are particularly known to have aggressive root systems, however even smaller trees may cause problems in the long run.
Identify the Problem Early
The sooner you identify root-related damage the easier and less expensive it is to repair. Watch for:
Cracks in paving stones
Humps that are raised up.
Openings between pavements.
Early detection of such signs saves a lot of repair work in the future.
Install Root Barriers
One of the best long term remedies is root barriers. These are hard panels or sheets sunk vertically in the ground to keep off roots in the paved ground.
How they work:
Root barriers do not push your pavers up, but direct roots downwards in an attempt to counteract the root penetrator. They are usually designed of plastic or metal and are embedded into the periphery of patios, walkways or driveways adjacent to trees.
The technique is best suited to new installations but it can also be incorporated during repairs.
Enhance the Ground beneath Your pavements.
The weaker or shallow base will enable roots to heave your paving. An adequately built base must consist of:
Bare soil excavated to the right depth.
Drainage layer made of compacted gravel.
Bedding sand for leveling
Pavered with joint sand and fitted correctly.
Extensive roots keep the soil strong and heavy, which minimizes movement despite the growth of roots around it.
Pruning roots, cautiously (when needed).
In many cases, there are roots that you may need to trim. This however should be done with care. Removal of big roots may make the tree weak or even die; it may become unstable.
Tips for root pruning:
Only small non-structural roots should be cut.
Do not cut roots that are greater than 2 inches thick.
Use an arborist where there are big trees.
Professional advice keeps the tree healthy and your paving safe.
Select Tree-Friendly Paver Designs.
In case you are considering a new patio or walk path, design solutions can be used to lessen future root complications.
Consider:
Self-draining permeable paving.
Plastic edging, rather than concrete edges that are hard and firm.
Soil left bare around tree trunks.
This quality enables the roots to expand without disruption of the paving.
Maintain Proper Drainage
Weakened paver base and attraction of roots by poor drainage. Ensure that water does not accumulate under surfaces that have been paved. Use:
Sloped paving
Drainage channels
Gravel sub-bases
Waterless, dry soils are less conducive to root development.
Replacing Severe Damaged Parts.
When the roots have already done a lot of lifting, the most effective way to do it is to take off the affected pavers, fix the root problem, re-construct the base and then install the pavers. This takes more effort, but it will revitalize safety and looks.
When to Call the Professionals
The issue with tree roots may be deceptive. In case of widespread damage or large and valuable trees, professional assistance is advised. Professionals will be able to evaluate root systems, install protection, and restore paving properly, saving you time, money, and future pain.
Final Thoughts
Patios and tree roots do not necessarily have to be hurdles. Early detection, smart design, and proper maintenance can ensure that your pavers remain flat, safe and beautiful to behold many years to come. Require professional assistance with patio or paving? Call Decks N Stones to get reliable, professional solutions.