It is critical to determine if there is a suitable existing base of resin bound materials that can be used before choosing what type of resin bound gravel installation to use. Surfaces of suitable construction, such as tarmac or concrete, can be overlaid with resin-bound. In order for them to function properly, they must be free of cracks. Concrete or tarmac surfaces can move under a resin overlay, causing the surface to fail.
Overlays are normally not permeable since they cover existing surfaces. It is the contractor’s responsibility to ensure a new base is permeable and compliant with the SuDS or Sustainable Urban Drainage System. It is common for contractors to offer longer warranties when installing the full base themselves. The advantage of knowing the resin bound base has been installed properly means there will be no unpleasant surprises in the future.
What do you mean by a base?
It is common for people to get confused about the terms ‘base’ and ‘sub-base’ when it comes to resin bound gravel. However, the base refers to what immediately follows the resin course and refers to the binder course itself.
How Does The Base Function?
Binding the resin bound gravel to the base is the function of the base. In addition to creating a smooth surface, it makes resin bound gravel easier to lay.
What do you mean by a sub-base?
Underneath the base course is what’s called the ‘sub-base’. It is important to clarify whether we are discussing the piece of resin-bound gravel underneath, or the whole structure composed of resin-bound gravel, when we talk about bases.
How Does The Sub-Base Function?
Two functions are performed by the sub-base. In the case of resin bound systems, one is to remove the working surface on the base and the other is to expand the intrinsic strength of the construction.
Which Sub-Base Is Best For Resin Bound Gravel?
A well-compacted bed of non-freeze susceptible MOT type 3 is the best sub base when installing resin bound gravel. Due to its SuDS compliance, it is the best option for resin bound systems. As water percolates through the system, MOT type 3 contains fewer fines than other sub-base materials and is thus less likely to cause sinking.
Depending on the condition of the soil beneath, the sub-base thickness should be calculated based on a survey. There is a general guideline, however, which states that it should be laid at a height of 100-250mm.
Most of the homeowners, when it comes to adding value to their home, are eager to install resin bound driveways due to the fact that it increases the curb appeal of the property and has a number of benefits over other types of surfacing or paving, for instance, ease of maintenance. The coating features draining holes, is UV stable, and will not be affected by freeze-thaw cycles. Apart from being easily permeable to the sustainable drainage system, it is practical and durable, and hence the most preferred.
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