Carlow Precast: House Builder / Developer Services - Stormcast Attenuation System

Your Project | Your Configuration | Your Total Concrete Solution

Stormcast Attenuation System

The market leader and most widely used stormwater attenuation solution in the UK.

Award Winning Stormwater Management Solutions for the Housebuilder


Our multi award winning patented stormwater attenuation solution is the market leader and most widely used in the UK. It has a comforting and proven track record with over 1700 installations. STORMCAST is now recognised throughout the industry by Designers, Engineers and Local Authorities.

First line of defence in Flood Alleviation


  • Sulphate Resistant
  • High over burden applications
  • Heavy vehicle loadings
  • Flotation resistant
  • 100 year + design life
  • Unlimited size and configuration options
  • Depts from 0.8 to 4m options
  • Short manufacturing and delivery lead times
  • Designed to British and EU Standards
  • 15 year guarantee

Superior Constructibility

  • No temporary propping required
  • Minimum spoil removal from site
  • Low flow and benching options
  • Integrated sump and flow control options
  • No underdrainage required
  • Factory fitted self healing joints
  • In-situ floor absorbs variations in ground preparation
  • Setting out strip ensures accuracy of critical components

Reduced cost solutions

  • You get everything you need in one system
  • No specific back fill required
  • No site applied sealants required
  • No grouting
  • Price certainty
  • Total cost quoted with no additional third party costs
  • DfMA Standard solution available
  • Significant use of locally sourced materials (by the customer)
  • Smallest footprint requirement

Enhanced Safety

Integrated safety hand railing

  • No hotwork required
  • Small team and rapid installation
  • RAMS included
  • Installation handbook for customer installation
  • Telephone support
  • Safe transport and offloading systems to EN12195

STORMCAST offers cost effective and easy to install solutions to meet the demands of almost any stormwater problem in heights from 0.8m to 8m.

The Process


  • Free quotation pack including enquiry specific drawings and detailed cost breakdown
  • Detailed proposal drawings and exact pricing
  • Standard solutions available from stock
  • Fast turn around on all quotation requests


  • Early design only service available for planning and evaluation
  • Section 104 Adoptable


  • Site specific design (if required)
  • Bespoke adaptations (if required)
  • Engineering service options. We offer both DfMA standard solution packages and comprehensive bespoke design and site documentation packages

Pre Installation Planning

  • Full specification for customer procured components supplied
  • Customer specified pipe openings coordinated and incorporated

Efficient installation

Smart modularisation combined with local materials ensures a typical installation of one week by three personnel with crane hire (for as little as three days).

Reduced preliminaries, labour, construction time and plant hire brings significant cost savings to your project.

Installation Features and Benefits
  • Free Pre-Start meeting on site
  • Simple site prep
  • Rapid installation (from as little as 5 days)
  • Installation team of 3 people
  • Components are lifted from delivery vehicle to final position
  • Components are delivered prepared for lifting (including lifting eye)
Installation Service Options
  • Installation supervision service options available
  • Approved installation contractor (direct hire by Customer)
  • Customer installation option
    • Easy Customer installation
    • Installation handbook for customer
    • Free use of Installation tools

Inspection & Maintenance

  • Easily maintained - Full maintenance and inspection access
  • Non-slip flooring


  • Low carbon solution (typically 50% GGBS)

100 year + design life

  • Watertight to BS8007
  • 100 year + design life to EC 2
  • 15 year guarantee and manufacturers all risk insurance
  • Professional indemnity insurance on design
  • Highly flexible solutions
  • No expensive backfill required
  • Fast installation
  • Suitable for car parks and vehicular loading BD21/01
  • Rigorous safety procedures implemented
  • Small installation teams
  • Approved installers available if required
  • Technical supervision for customer installation if required

Typical STORMCAST product timeline

Quotation and detailed proposal 6 days
Design and drawings (for approval) 14 days
Design and drawings DfMA Standard (web download available) 0 day
Manufacture and delivery (depending on size and complexity) 7 - 28 days
Installation (depending on size and complexity) 5 - 28 days


STORMCAST is adaptable to any plan shape or configuration with preformed openings to accommodate the site drainage strategy. Capacities to date have varied from as little as 80m3 to as much as 23,000m3, all displacing competitor products as the best value and most efficient solution. Our products are installed beneath green areas, car parks, roads and buildings.

Challenging sites

STORMCAST allows for staged construction including backfilling and is resilient to flooding during construction.


STORMCAST tanks and soakaways are the perfect compliment to Sustainable Urban Drainage Systems.

Culvert Applications

Significant advantages over traditional culverts include:

  • Watertight self-healing joints.
  • Lighter components installed using a track machine, eliminating the cost and disruption of a mobile crane.
  • Complex junctions and articulations are easy to form without additional cost.
  • Simple system of setting-out pads is used to ensure accurate positioning for line and level. The cast in-situ floor then absorbs any variation in the base preparation eliminating the requirement for precision required by traditional culverts.

Rapid and easy installation

Find out how you can get the same components to the same standard, faster and more cost effectively when you choose a DfMA Standard STORMCAST

Advanced Infrastructure Design

We are at the forefront of large offsite fabrication technology, undertaking responsibility for the design and delivery of some of the largest precast concrete infrastructural projects in the UK.

Whether your project is large or small, we can take overall design responsibility or provide just the service you need. We support the site teams using all modern design technologies (including BIM) to deliver competent innovative solutions on time, with less cost and less carbon.

“Stormcast proved more beneficial than in-situ due to cost, health and safety, maintenance and future extension. Given the constraints of the development, we feel Stormcast provided the most economical and robust solution.”

Anthony Tang, Technical Manager, Persimmon Homes

“Carlow Precast assisted in obtaining Yorkshire Water approval by providing the technical backup to our application. Stormcast offered a good cost saving and shorter construction period reducing a number of the stages required by alternative systems.”

Paul Wharam, Engineering Manager, Barratt Homes

STORMCAST clients include:

For more information about our STORMCAST Attenuation System products and services please call our technical team on 059 915 9550 or email us at .

England Office
Carlow Precast,
Gunnery House,
Gunnery Terrace,
The Royal Arsenal,
London SE18 6SW

Tel: 0870 493 1408
Fax: 0870 493 1409

Wales Office
Carlow Precast,
Princess House,
Princess Way,
Mid Glamorgan,

Tel: 017 928 25840
Mobile: 07967 186111

Scotland Office
One St Colme Street
Edinburgh, EH3 6AA

Tel: 0131 452 2046
Fax: 0131 452 3030

Ireland Office
Co. Carlow,
Eircode: R93 E129

Tel: +353 (0)59 915 9550
Fax: +353 (0)59 915 9202

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