Permeable Paving Installation Questions

It should, provided the sub-base is prepared correctly and the drainage slope is right. If the base is too shallow or the gradient is wrong, water can still sit on the surface. That is why a soak test and slope check happen before any specification is agreed.

The jointing aggregate can accumulate fine debris, which slows drainage gradually. Periodic sweeping, once or twice a year, clears the gaps and restores flow. It is a straightforward task that keeps the system working as installed.

Not always. Ground type, available excavation depth, and existing slope all affect whether a permeable build-up is suitable. A site assessment checks these factors before any work is recommended.

Persistent standing water softens the ground beneath the existing surface, which accelerates sinking and cracking. The longer it is left, the more likely the sub-base will need full replacement rather than a straightforward installation over stable ground.

Clay soil drains slowly and can push upward into a crushed stone layer if there is no membrane separating them. A deeper sub-base with a correctly specified geotextile membrane compensates for clay’s low permeability and keeps the drainage path clear.

Excavation, geotextile membrane, crushed stone sub-base, screeded bedding layer, permeable blocks, jointing aggregate, and edge restraints are each quoted as separate line items. Drainage channels are added as a separate line where the slope assessment identifies them as necessary.