The Challenge

To provide a robust paved surface for both car parking and pedestrian use which could allow all surface water, both from the car park and the crèche roof, to infiltrate back to ground.

The client wanted a fully designed and guaranteed permeable paving system which would allow full infiltration to ground and therefore remove the need for surface water discharge to combined sewage pipe.

The products would have to:

Accommodate the vision specified by the architect

Be sympathetic to the modern design of the main building

Be available to suit the ambitious project timeline

Produce a safe surface, free of standing water, which can stay looking good for years

The Solution

Roadstone provided a fully designed and guaranteed permeable paving system through Roadstone’s complimentary design service for Permeable Paving. This involved 55 parking spaces being constructed using Roadstone’s Aquaflow paving system.

The build-up for the parking spaces was made up of Inbitex Geotextile below 150mm of 10-63mm crushed aggregate (containing a layer of SC Integrid Reinforcement) below 150mm of 5-20mm crushed aggregate below a second layer of Inbitex Geotextile below 50mm of laying grit below the  80mm Aqua Thomond Harvest Blend Paving brick. The paving colour was harvest blend with charcoal paving to define the parking spaces. Roadstone also supplied distribution tanks to allow the distribution of roof water into the permeable stone.

All components were supplied and guaranteed by Roadstone from local Roadstone Quarries and Roadstone’s Gooig paving plant in Limerick.

10mm Dense Wearing Course Macadam was supplied from the Roadstone Blacktop plant in Carrigtoohil and laid by a local contractor. Roadstone’s splayed kerb was used to form a border between the paving and the Macadam. 80m² of Indian sandstone was supplied from Roadstone’s retail outlet in Classis and laid around the front entrance of the building.

Roadstone provided full technical support for the Aquaflow paving including a CPD presentation to the assigned architect a number of site visits with the main contractor by a Roadstone Engineer.

The Result

A visually appealing job was finished to a high standard ensuring that all requirements from the design stage were successful in achieving their desired affect.

Surface water from the car park and the crèche roof now infiltrate through the paving


Send full product information to, and arrange site visit with, the contractor a month before project commencement.

Ensure contractor is aware of the sequence of product usage. The site was tight and storage space for material was limited.


Engineering Company – Ray Keane and Associates

Main Contractors – John Curran & Son

Paving Contractor – Wallace Paving