LBS Website Case Study Main Image
London Business School – a flagship of roofing best practice London Business School – a flagship of roofing best practice

London Business School – a flagship of roofing best practice

London Business School – a flagship of roofing best practice


Project: London Business School, The Sammy Ofer Centre
Sector: Higher Education
Main contactor: Wates Construction Limited
Roofing contractor: EJ Roberts Roofing Limited
Main contract value: £30M
Roofing contract value: £570K

The challenge

The elite London Business School has been delivering world class business education for 50 years. The works to refurbish the Old Marylebone Town Hall comprised the internal and external remodelling, refurbishment and fitting out of two existing Grade 2 Listed buildings. It also included extensive works to the Council House and the Annexe incorporating a link bridge, to create The Sammy Ofer Centre. The Centre is located on basement, lower ground, ground and four upper floors. These upper floors feature a mezzanine in the Annexe to form a lecture theatre and associated educational functions. The project also included the construction of a new glazed link between the two buildings.

Key points

LBS Website Case Study Key PointsTo help bring this historic building up to 21st century standards, a highly concentrated array of plant and PV equipment had to be accommodated on the roof, some of which were sensitive to the additional ballast and to foot traffic.

As part of the 2nd stage tender process, Wates Construction Limited (WCL) needed to select a highly robust waterproofing system for the roofs which could tolerate access by following trades and routine maintenance once the building was in use.

WCL reviewed the roofing specifications proposed by the design team and identified that the specified 1.1mm thick, EPDM single ply membrane (SPM) for the overlay and replacement waterproofing roofing system was deemed not sufficiently robust for the project.

The team also ascertained that the warranty was limited only to the material […]

Stopsley High School CGI website case study image
Seven schools share robust roofing systems Seven schools share robust roofing systems

Seven schools share robust roofing systems

Seven schools share robust roofing systems

Project:  Hertfordshire, Luton & Reading Priority School Building Programme
Architect:  Rock Townsend
Main contractor: Interserve Construction
Roofing contractors: Briggs Amasco, MAC Roofing and AC Plc
Membrane: IKO PermaTEC hot melt

SIG Design & Technology and SIG Insulation are working with the Interserve Kajima consortium on a batch of seven secondary school projects to deliver a value-engineered, robust roofing solution as part of the Hertfordshire, Luton and Reading Priority (HLR) School Building Programme. Four of the schools including Stopsley High School Luton have been designed by London architects, Rock Townsend.

Stopsley High School CGI website case study inset image 3The roofing solution for all seven projects needed to overcome a number of specific design challenges based on three core challenges; the waterproofing of a mixture of concrete deck and steel deck substrates; a robust inverted roof system to cope with ongoing foot traffic and maintenance of the M&E plant sited on the roof and meeting the stringent acoustic performance requirements of BB93. The roof design needed to take into account the overall weight of the roof element, and ideally, utilise a tried and tested system.

SIG and IKO Plc, our manufacturer partner, engaged at very early stage to provide technical liaison between Interserve and the project architect to develop the correct technical and most cost-effective waterproofing solution. It attended design meetings to assist with the production of a robust detailed specification and a simplified roof design.

Critically, early involvement facilitated thermal compliance as a flexible thermal zone was created to compensate for […]

Five Broadgate Web Case Study Main Image 1
5 Broadgate: hot melt roofing at a groundscaping scale 5 Broadgate: hot melt roofing at a groundscaping scale

5 Broadgate: hot melt roofing at a groundscaping scale

5 Broadgate: hot melt roofing at a groundscaping scale

Project:  5 Broadgate, City of London
Client:  British Land / Blackstone JV
Architect:  Make Architects
Main contractors: Mace
Roofing Contractor: Briggs Amasco
Waterproofing membrane: IKO PermaTEC hot melt

When Make Architects needed a waterproofing solution for their latest project in the City of London, they turned to IKO PermaTEC hot melt. Here, we set out why and share with you some pictures of this particularly challenging roofscape.

5 Broadgate is truly a “groundscraper”, a term coined by the FT as it announced the unveiling of the UBS new City of London headquarters in May 2006. Just 12 storeys of offices yield over 65,000m2 of high-spec office space, including four football pitch-size trading floors and 7,500m2 of concrete-decked roof and terraces.

Make partner, Ben Stuart was package architect for the roofing, basements, structure and services on 5 Broadgate. Ben described the roofing strategy when he presented at our #PerfectRoof seminar in October 2014.

Waterproofing such an expansive and complex roof has its particular challenges and required, as Stuart said, ‘robust and reliable detailing delivered by contractors who could assure the highest standard of workmanship within the given timescales.’ The choice of waterproofing was to perform for a minimum of 30 years, be cost effective and also contribute towards the building’s design stage BREEAM Excellent rating.

Working closely with contractor, Briggs Amasco and construction manager Mace, Make looked at a range waterproofing options and reviewed their buildability.

These options included:

  1. A warm roof construction – but concerns about protecting the waterproofing discounted this option;
  2. Cold applied liquid – this was also ruled out for the majority of the roofing due to its shorter lifespan (20 years) and […]
cs Wakefield Hospital
Pinderfields Hospital Pinderfields Hospital

Pinderfields Hospital

Pinderfields Hospital

Name of project:  Pinderfields Hospital
Location:  Wakefield
System:  PermaTEC Hot Melt System
Product:  PermaTEC Ecowrap Compound
Contractor:  Prater
Size:  15,000m2

A state-of-the-art hospital in Wakefield is one of three hospitals which have benefitted from a PermaTEC Hot Melt system, installed by national building envelope contractor, Prater.  In total over 15,000m2 of the material has been used on roof areas at the Wakefield site.

PermaTEC EcoWrap features new wrapper technology which blends into the material itself when heated, removing the need for heavyweight cardboard box packaging and eliminating site waste. The product requires lower application temperatures on site which speeds up installation and uses less energy. The product is also manufactured in the UK, which means its delivery has a dramatically lower carbon footprint than imported systems.

PermaTEC Hot Melt is only available from SIG Design & Technology and can only be installed by their IKO trained and licensed contractors.

Pinderfields Hospital case study