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Roadstone Duraflow Porous Asphalt has been designed for use as a surfacing solution for porous pavements and Sustainable Urban Drainage Systems (SUDS) applications. Duraflow has been designed to soak up surface water which then percolates into a stone sub base layer – Roadstone Permeabase. Duraflow surface course incorporates Polymer Modified Bitumen (PMB) and carefully selected high quality aggregates to maximize performance and durability.

Key Features & Benefits

  • Sustainable Environmentally friendly solution to rainwater management
  • Reduces the need for permanent drainage, surface water sewers and balancing ponds
  • Quick to install
  • Drains the water quickly, eliminating standing water
  • Facilitates reuse of rain water
  • Available in a range of mixes
  • Made from local materials to the highest standards
  • 100% Recyclable

Technical Specification

Produced in accordance with

  • IS EN 13108-7 Porous Asphalt
  • NSAI’s Standard Recommendation (SR) 28
  • IS EN 13108-20: Type Testing and IS EN13108-21: Factory Production Control

Case Studies & Resources

Case Studies

Case study: Dublin Airport Red Car Park

Case study: Luas Park & Ride, Carrickmines, Dublin


Supply and lay contracting

Roadstone provide a national supply and lay contracting service for the supply and lay of bituminous and non-bituminous materials. We provide specialist contractors for civil engineering, traffic management, pavement removal, linemarking, resin bonded surfacing and other pavement related expertise.

Contact Contracts Sales Department at 01-404 1200

Or email us at


We are sub-contracted nationally to surface Motorways, National Primary and National Secondary Roads, Airports, Ports and other key elements of our national infrastructure.

Local Authority

With up to 30 crews working nationally we offer an unrivaled service to Local Authorities resurfacing and repairing the country’s road network

 Commercial / Industrial

We surface car parks and roadways for new and existing commercial and industrial units. We have extensive experience carrying out surfacing works to factories, schools, supermarkets, housing estates and other enterprises.

Sports and Leisure Facilities

With the latest technology to ensure level control to the strictest tolerances. We provide a range of pavement solutions of permeable and non-permeable surfaces for sports pitches, horse gallops, running tracks, tennis courts, play areas and other leisure facilities.

We can offer a specialist service for minor civil works to prepare your driveway prior to surfacing. On completion we can provide linemarking or specialist resin bonded surfacing if required.

Our asphalt production facilities carry CE Marking and are ISO Accredited ensuring the durability and longevity of your new driveway.

Supply only

We offer a supply only service such that bituminous materials can be collected or delivered directly to your required location.

Supply only orders are taken centrally such that we can coordinate your order from one of our 20 Asphalt plants to best suit your delivery requirements.

Contact Dave McSherry 01 – 404 1273

Or email

Asphalt materials

Asphalt Overview

 Roadstone owns and operates 20 Asphalt Plants strategically located at selected locations around the country, offering a national supply and ‘supply and lay’ blacktop contracting service.

All of our Asphalt Plants carry the CE Mark for Factory Production Control which ensures the quality of our produced materials through a European Standard testing regime. We also operate an independently audited, ISO:9001, Quality Management System at all of our locations.

Our Asphalt plants are further supported by our CRH Asphalt Research and Development Laboratory located at our flagship Belgard Quarry. This facility, unique in Ireland and to Roadstone, ensures that we are at the forefront of international best practice with respect to product research and development.

We provide both a supply only service for our bituminous materials, where materials can be collected and delivered, and a contracting service for the ‘supply and lay’ of bituminous and other road construction materials.

Our Road Contracts Division is the largest specialist blacktop production, ‘supply and lay’ company in Ireland with up to 30 crews operating out of our 20 blacktop plants.

As a company we have the necessary skills through relevant experience and resources to successfully complete surfacing and civil engineering contracts either as main or sub-contractor.

We undertake all sizes of blacktop projects for government funded bodies, local authorities, commercial enterprises and private individuals including such schemes as:

  • Infrastructural Projects :Motorways, Road Realignments
  • Local Authority Surfacing Schemes
  • Commercial / Industrial Projects

– Access Roads

– Car Parks

  • Sports and Leisure Facilities

– Pitches

– Tennis / Play Courts

  • Private / Domestic

– Access Roads

– House fronts

CRH Asphalt Research & Development Laboratory

Based in Roadstone headquarters in Belgard, CRH asphalt research & development laboratory was established with the objective of researching new and existing asphalt mixes and to develop products and processes to enhance the CRH groups leading position in Asphalt technology.

The development of harmonised product standards and test standards by CEN (Comite European de Normalisation) has placed a greater emphasis on material performance and out performing the requirements of these standards has been a major focus.

With a comprehensive range of test equipment available we can measure a wide  range of material characteristics including stiffness, fatigue and permanent deformation, by both Swedish Indentation and Vacuum Tri-Axial methods.  Aggregates, Bitumens and Fillers are also tested in the laboratory.

The Laboratory has performed a large number of material designs over the last few years such as Porous Asphalt (M50), Marshall Asphalt (Dublin & Shannon Airports) and a large range of Thin Layer Asphalts (NRA Motorways).  Comprehensive design protocols have been established in the laboratory for various material types which ensure that end performance requirements are achieved.  The laboratory has also developed new materials which offer solutions and a wider choice to our customers. The tests performed in the laboratory are accredited by the Irish National Accreditation Board (INAB).

With the introduction of the EN13108 series of Bituminous product standards there is now a requirement for our products to be Type Tested. This type testing can incorporate performance testing and this is done in the CRH Asphalt Laboratory. Guidance on current Type Test requirements is given in Standard Recommendation(SR) 28- Standard Recommendation for the use of the EN 13108 series.