Driveways Paths and Patios – Sub base requirements
Is a sub base really necessary?
Our resin bonded gravel and resin bonded stone for driveways works use an existing surface as a sub base. Tarmac, asphalt, concrete and imprinted concrete are the dictates for vehicle use.
Our resin bound surfacing and resin bound paving options are not applied to solid monolithic surfaces as these are used for foot traffic and therefore require a sub base. Example uses being paths or patios.
Not all Resin Driveway companies work on the same basis so it is important to ask what is the difference and why.
There are two main differences
- Permeable resin bound surfacing and resin bound paving
- Impermeable resin bonded gravel and resin bonded stone
Originally resin bonded gravel and resin bonded stone were used for high friction anti skid surfacing road use on top of tarmac and asphalt. As a result of development of Resin and it’s uses it has progressed into a porous and permeable surfacing option – resin bound paving and resin bound surfacing
- Permeable resin bound surfacing and resin bound paving uses a sub base and laid on compacted hardcore, sand or a permeable substrate such as wearing course for tarmac.
- Impermeable resin bonded gravel and resin bonded aggregate is laid on the solid monolithic surfaces, tarmac, concrete, imprinted concrete and therefore uses a sub base but the sub base originally laid for the tarmac, imprinted concrete, tarmac or asphalt.
When it comes to paving such as block paving or slabs they nearly always need a sub-base usually between 75mm and 150mm. A sub base plays in important role in balancing and apportioning the stress applied if vehicles are to be used on it.
Preparation is always a key aspect. It is important to be aware that varying sizes and “lumps” of hardcore will not offer the same uniformity as graded hardcore.