Case Studies

Putney Common High School, London

Resin Bound Gravel on a Rooftop

SEL were appointed to install a hard-surfaced MUGA and two terraced areas on a rooftop in Putney, circa 1500m2 in total. All materials had to go through a parapet window in one corner of the building. This meant that the areas had to be constructed in sequence so to prevent traversing through installed areas and contaminating the newly installed surfaces. 

There were several rainwater outlets from the roof and rainwater downpipes from overhead canopies.  These were integrated into the SELSports solution using PVOD chambers with recessed access covers to blend in to the surrounding areas. 

The project was delivered on time and within budget and the Main Contractor (Durkan Ltd) were impressed with the speed at which the works were completed.

Battersea Park High School, London

Sand Dressed Synthetic Grass MUGA on a Rooftop, including Fencing and Roof Netting 

Midgard Ltd employed SELSports to install a sand dressed synthetic grass surfaced MUGA. Gravel was laid as a regulating layer to achieve a level flat surface for installation. SELSports units were installed on to the regulating layer with prefabricated shockpad and synthetic grass laid on top.

Line markings were installed to allow a variety of sports on the 'multi-use' synthetic grass system. The fencing system was bolted through to the concrete roof decking with the bolts waterproofed. The depth of the insulation and construction build up had to be taken into consideration to determine the correct under-sail of the fencing system. The fencing was supplied in the Clients preferred colour option and and touch up spray provided for future maintenance. Roof netting was installed over the facility to prevent balls escaping the MUGA onto the adjacent main road below.

White Collar Factory, Old Street, London

2 Lane Polymeric Running Track - 16th Floor

The Client wanted to install a 2-lane running track around the perimeter of the rooftop of the newly built White Collar Factory in London. SEL were contacted to deliver a solution. The running track sat between the tracks that the Building Maintenance Unit (BMU) uses to maneuver around the perimeter of the building. This was a very winding route with many curves and chages of direction.

The BMU tracks had to be covered with a protection plate that was infilled with a white polymeric surface to demarcate the edges of the track. This special white polymeric surface required an aliphatic (UV stable) binder that prevents the surface from yellowing or degrading in the future.

The whole construction of the running track was permeable. The red polymeric surface, which was a 13mm deep full depth EPDM system was laid on a resin bound gravel system to provide a stable surface reducing deflection. The RBG was laid on SELSports units which were laid on the insulation panels on the roof.

White Collar Factory, Old Street, London

Synthetic Grassed Area - 17th Floor

One of the buildings unique features of this building was an outdoor area on the top floor 17 storeys up. SEL installed a synthetic grassed recreational space. This area provides a breathtaking London backdrop, one of the most impressive skylines in the world. The synthetic grass system installed was reinforced with additional geotextile layers so that the surface could safely take the weight of a stiletto heel.

Wirral Youth Zone, Birkenhead

Rooftop 3G Pitch 

SELSports is a nominated sub-contractor for the Onside Youth Zones Framework projects for rooftop sports surface installations. As such SEL installed a rooftop 3G pitch on the first floor of the Wirral Youth Zone project in Birkenhead.

In order to meet the tight programme schedule for the project the SELSports sub-base replacement system was pre-panelled into 3 unit panels with a galvanised mild steel edge detail along one side for the perimeter and 9 unit panels for the central area of the pitch. This off-site prefabrication allowed the 574m² sub-base of the pitch comprising heavy duty geotextile, gravel regulating layer and 85mm SELSports units to be installed in 4 days.

Another innovative feature at the WYZ project was the fencing system. To maintain the roofing manufacturer’s warranty, the roofing’s waterproof system could not be perforated. To achieve this SELSports installed a floating post system, a bespoke fencing system secured to the surrounding steelwork, projecting across with SHS posts and angle irons. The system was installed without any issues, including the gate posts which were hung from free standing intermediate posts. 

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