It is important to have the right base for a resin driveway.
What is the distinction between a Base and a Sub-base?
Two bases are essential for resin bound installations: the base and sub-base. While it is confusing to differentiate between these two bases, they are equally important to understand and do the right thing.
The base refers to the surface where the resin bound material is laid and bonds. This is also called the ‘binder route’. Sometimes the term “base” is incorrectly used to mean the entire structure under the resin bound system (including sub-base), so be sure to distinguish them.
The sub-base of resin bound surfaces is, as the name suggests the surface underneath the base (or ‘binder course’). A strong subbase will increase the strength of the system and provide a level platform for the base.
If you plan on laying a permeable layer above your subbase (such an open course macadam), then your subbase should be MOT type 3 compacted. MOT Type 1 may be used if your sub-base is not permeable but has enough slope to allow water to flow to a drain.
To be SUDS compliant, a resin-bound system must be permeable.
Concrete and macadam are the main binder courses or base materials for resin bound systems. Each one has its own advantages and disadvantages.
The following information shows a typical base construction and best practices.
Macadam can be described as a construction material that is composed of layers of compacted broken stone, which are bound with tar or bitumen. If you need a permeable, SUDS-compliant system with a resin binding, Macadam can be used.
For macadam base courses, the recommended depth is 50mm.
Concrete is one the most used building materials worldwide. Concrete usage globally is more than double the amount of aluminum, wood, plastic, and steel combined.
A concrete base, or binder course, can be used for a resin-bound system. However it is not permeable. It will need drainage and adequate fall for water to drain into the drainage.
Concrete base courses should be built up with a C25 concrete smooth brushed concrete at a depth of 100mm. New concrete will require a primer. Concrete should also be fully cured before it is attached to a resin bound driveway.
You need to make sure you do not place a new resin bound material on an existing binder or base course. These are: