Converng commercial spaces into residenal accommodaon typically requires the specificaon of new drainage systems that are fitforpurpose for the project’s new use. That was certainly the case for Edinburgh House in Harlow, which developer Land Charter Homes has converted from a 1990s oce space into a modern apartment block

he conversion required new drainage systems for individual apartments and an enhanced existing soil and waste network for the entire building. With the change of use into a busy living space for hundreds of residents, the drainage also needed to be robust and quiet.


uEdinburgh House in Harlow, which developer Land Charter Homes has converted from a 1990s oce space

Commercial plumbing and drainage installers, KP Evans & Co, turned to Wavin AS – an advanced push-fit drainage system that offers high performance and significant noise reduction credentials – to meet the brief.

The sound of silence

The potential of Edinburgh House as a residential development is immediately clear. Originally designed by Conran and completed in 1994, the building has striking views of the Harlow Town Parks and River Stort. The finished project will contain 253 apartments around three internal foyers, with a shared roof terrace.

Specific considerations need to be made when specifying drainage solutions for such multi-storey residential re-developments. For example, drainage can contribute significantly to overall average domestic property noise levels and building regulations stipulate that the daytime average for this noise must not exceed 45dB. Drainage noise in buildings is caused either by airborne sound, when water hits a pipe wall, or structure-borne sound which transmits from the impact

Low noise solution for residential conversion project

zone throughout the whole pipe. Both sources are undesirable and disruptive for residents.

With Edinburgh House, the potential for unwanted noise was further increased due to the requirement for particularly long runs, along multiple apartments, to remove wastewater from the building.

Wavin AS

Made of a minerally reinforced polypropylene called Astolan, Wavin AS absorbs airborne and structure- borne sound thanks to its specialised molecular structure and use of custom- designed noise-reduction fittings. The system offers a sound performance of under 30dB at 2I/s, in line with European standards.

Tom Roy, the Wavin technical sales manager who recommended Wavin AS for the project, notes: “Reducing unwanted noise in drainage systems is an increasingly pressing consideration for developers working on large-scale developments. As well as finding a product range than is suited to installation in longer lengths, the system must also provide exceptional acoustic properties.

“Wavin AS is well-suited to such instances and is designed with ease of installation in mind, with a range of sizes and push-fit fittings available.” John Crisp, project manager at, KP Evans & Co, comments: “The Edinburgh House project was an open specification; however, Wavin is always our manufacturer of choice. “We have previously used products from Wavin’s OSMA commercial drainage range and we know it offers inherent reliability with unrivalled performance. Wavin AS stood out to us on this project for a number of reasons. Not only did it help address the issue of unwanted drainage noise, it was also remarkably simple to install. We could rely on comprehensive support services from Wavin in everything from system design to installation advice too.”

Style and substance

Edinburgh House is the latest stand-out property to be added to the Land Charter Homes portfolio. And, with the Wavin AS sound reduction system now in place, residents can enjoy a relaxing lifestyle in their new, modern homes. 10 BUILDING SERVICES & ENVIRONMENTAL ENGINEER JULY 2019

uWavin low noise soil range with hearing protecon

About Wavin UK W

avin UK is a member of the Wavin Group, the world leader in

plastic pipe systems for residential, non-residential and civil engineering projects. Systems offered, include market-leading Osma above and below ground drainage and Hep2O hot and cold plumbing and underfloor heating, as well as a wide range of Wavin drainage and stormwater management solutions for all application areas.

The Wavin Group headquarters are in Zwolle in The Netherlands. The group has a direct presence

in 25 European countries with 40 manufacturing sites. Outside Europe, the Wavin group operates through a global network of agents, licensees and distributors. The group employs some 5,500 people and has annual revenues of around €1.2 billion. In 2012, Wavin became part of the Mexichem Group, the Latin American leader in pipe systems and petrochemicals. Wavin provides effective solutions for essential needs of daily life: safe distribution of drinking water; sustainable management of rainwater and wastewater; energy-efficient heating and cooling for buildings.

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