The biggest mistake with any DIY resin driveway is focusing too much on the resin surface and not enough on the base underneath. Resin bound surfacing is strong, but it is not designed to fix a poor foundation.
A proper driveway needs a solid, stable, load-bearing base. In many cases, this means sound tarmac or concrete. If the existing surface is cracked, loose, uneven, or holding water, it needs to be repaired or replaced before resin is installed.
Laying resin over gravel, unstable paving blocks, soft ground, or a damaged base can lead to movement underneath the surface. When the base moves, the resin above it may crack, sink, or break away.
This is why professional installers always assess the existing driveway first. The success of the finished resin surface depends heavily on what is happening underneath.