Understanding Resin Bound Bases
The base is as important as the mix and laying of a resin driveway.
What is the difference of a base and a s-base?
Two bases are essential for resin bound installations: the base and sub-base. Although they can be confusing to identify, each base is important and equally important.
What is the base of this?
The base refers to the surface where the resin bound material is laid and bonds. This is also known simply as the binder course’. The term base is often used incorrectly to refer the entire structure beneath the resin bound (including the subbase), so it’s important to distinguish between them.
What is the Sub-base?
As the name implies, the subbase of a resin bound material is the area that lies below the base or ‘binder’. A strong subbase will increase the strength of the system and provide a level platform for the base.
What is the best resin-bound system sub-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 is recommended if the base is not permeable and has sufficient slope to allow water flow into a drain.
A resin-bound installation must be permeable in order to be SUDS compatible.
What are the main Resin Bound binding course materials?
Concrete and macadam are the main binder courses or base materials for resin bound systems. Each has its unique characteristics and benefits.
The following information shows a typical base construction and best practices.
Resin-bound tarmac base
Macadam, a type construction surface, is formed by successively compacted layers made of broken stones and then bound with bitumen (tar) or molasses. If you need a permeable, SUDS-compliant system with a resin binding, Macadam can be used.
A macadam base course should be built up to a depth of 50mm and a 14mm porous, close-graded surface macadam.
Concrete base with resin-bound concrete
Concrete is one the most used building materials worldwide. Concrete is used globally twice as often than wood, steel and plastic combined.
For a resin bound solution, a concrete base or binder course may be used. However, this is not a permeable foundation and will require drainage.
C25 smooth-brushed concrete should be used as the concrete base. Concrete must be primed before resin bound driveways can be installed.
Does an existing driveway base work well with Resin Bound?
Before you start laying a resin bound surface onto an existing base or binder, you must first make sure these things are checked. These are the following:
- Are there any steps you need to work?
- Are there cracks or holes in the base? These cracks will need to be repaired using a cross-layer membrane.
- Repaired areas that are badly damaged will need to be removed at a minimum depth 200mm.
- Be sure to place an edge on any boundary. Removing a boundary can cause damage to the resin-bound surface.
- Are you looking for edging details? Block or concrete kerbing should protrude 18mm from the existing base edge.
- Make sure to thoroughly clean the base using a power washing, and remove all organic material.
- Before you lay the resin bound surface, your surface must be completely dry. Water and resin are not compatible.