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Axter Ltd | Dylon Works London
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Case studies

Lower Sydenham, London

Dylon Works

A high profile 0.7 hectare residential development, completed in 2017. This project featured the Aquamodul warm blue roof, one of the largest schemes of its kind ever achieved within the capital.

Client
Crest Nicholson London
Project type
New Build
Project sector
Residential
System categories
Bitumen,
Hot Melt,
Blue Roofs
Accredited Installer
Tilbury Contracts Limited
dylon works buildings

Challenges

The project presented significant challenges, such as demanding thermal performance criteria combined with a challenging planning requirement to achieve maximum outflow rain water run off rates of 10l/s across the entire 7500m2 site.

From final QA Block A Level 7 Details penetrations in progress 0417

dylon works roof building works

Solutions

The design and implementation of a site wide blue roof ensures the development’s contribution to mitigating flood risk in London and supports the protection of England’s waterways. Modelled over a 300 year period, the blue roof design is future proofed in terms of its provision for likely climate change and increases in predicted peak rainfall events.

Second generation hot melt structural waterproofing system, Wilotekt-Plus, was installed as the Air and Vapour Control Layer (AVCL), which provided an extremely robust waterproof structure during the external envelope and superstructure construction phase. Hytherm ADH thermal insulation and BBA accredited Force Dalle bitumen membranes with anti-root technology where later installed to complete the waterproofing and insulation system.

Prior to hand over and installation of the Aquamodul blue roof attenuation cell, the waterproofing system was integrity tested using a differential pressure testing method by independent specialists to ensure the roof was watertight. Once passed as secure, the Aquamodul blue roof cassette and biodiverse (brown) living roof finishes where installed with the further addition of a PV panel array generating the majority of the building’s electrical energy requirements.

Dylon CGI B credit Crest Nicholson

Systems in use

  • FORCE DALLE inverted concrete structure single layer gravel finish
    Force Dalle®

    The first of its kind, Force Dalle is an innovative hybrid waterproofing system that combines the benefits of hot melt systems and advanced polymer modified bitumen membrane technology to create a unique and highly durable system that is a cost effective alternative to traditional hot melt.

  • WILOTEKT PLUS inverted roof concrete structure ballast 1
    Wilotekt®-Plus

    The original and industry renowned second generation hot melt system. Unique structural waterproofing designed and manufactured for use on all inverted roofs, podium decks, living roofs, blue roofs and car park decks.

  • FORCE DALLE warm roof concrete structure single layer aquamodul ballast
    Aquamodul®

    The Aquamodul blue roof sustainable drainage system is designed to attenuate, control and manage rainwater at source, providing attenuation capacity within the flat roof or podium deck construction of a development that can be combined with living roof, Solar PV and multi-functional mixed amenity finishes.

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