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Added Green Roof protection for former WWII bunker

Originally built in 1941 as a special decoy target for German bombers, The Decoy Bunker is tucked away in the rolling hillsides of Monmouthshire and has been fully restored as a unique holiday home.

As the bunker had to blend directly into the hillside, a highly durable waterproofing system was needed to provide full protection against water travelling down from the surrounding landscape: a green roof waterproofing solution that would provide the desired ‘camouflage’ effect by using the existing soil and grass from the surrounding landscape.

Alumasc’s Registered Contractors Span Roofing installed Blackdown Greenroof Drainage Layers, Intensive Substrate and Washed Pebble Ballast to finish the green roof. A Derbigum Black Anti-Root Built-Up System sits below the green roof and provides a highly reliable waterproofing solution and maximum peace of mind for the future, as the Derbigum system holds 40-year durability certification with the BBA (British Board of Agrément).

Further details about Alumasc’s full range of waterproofing systems can be found at www.alumascroofing.co.uk or call the Alumasc technical team on 03335 771 500.
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Sika provides watertight solution to town centre car park

Water ingress was being experienced to the exposed Asphalt split level decks at Sunbury Cross Shopping centre. With the site providing nearby residents with their only parking means, it was vital the system used to waterproof the existing surface allowed for a rapid installation which could withstand long-term vehicular stress. Sikafloor® RB58, a quality, highly-crack bridging system from global building product manufacturer Sika, met all the project’s requirements.

Sunbury Cross multi-storey car park in Middlesex serves the High Street’s busy shopping centre. The asphalt surface of its top two decks – which are reserved for residents – had become cracked and blistered due to long-term exposure to the elements. Contractor Makers Construction was appointed by clients, real estate leaders Colliers International, to install Sikafloor®-RB58 to refurbish the damaged surface as part of a five-week programme of repairs.

Selected for its dynamic crack-bridging, incredibly fast curing-times and high abrasion resistance, Sikafloor®- RB58 comprises of a fully reinforced system to guarantee the surface is watertight and free from cracks which allow the passage of water.

Wayne Greenwood, Site Manager at Makers Construction, commented: “Sikafloor®-RB58 was perfect for this project. The Sikafloor Primer allowed us to adhere directly to the asphalt, minimizing the surface preparation required.”

As part of the repair system, Sikafloor®-10 Pronto, a medium-viscosity, fast-curing primer was applied to the car park’s 3,000m2 asphalt surface. To fully strengthen the base coat, glass fibre reinforcement mat, Sika® Reemat Premium, was applied and embedded into the Sikafloor 32 Pronto. A further layer of Sikafloor®-32 Pronto filled with 1:2 Sikafloor® -Pronto Filler was also applied and fully broadcast with Quartz Sand.

Sikafloor®-18 Pronto, which offers excellent mechanical and chemical resistance, provided the system’s fast-curing, solvent-free seal, giving the floor a superb skid and slip-free finish sufficient to meet HSE regulations.

Wayne Greenwood added: “Sikafloor®-RB58 Pronto is incredibly easy to apply and as promised; fast-curing, which was vital to ensure the project was completed in good time.”

Despite work being intermittently disrupted by bad weather, repairs to the car park decks were completed on schedule and to the client’s full satisfaction. Sikafloor®-RB58 has ensured residents have renewed, hard-wearing, aesthetically pleasing and safe car park decks which offer long-term resistance to the elements as well as traffic-based wear and tear.

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Sika Liquid Plastics protects National Sailing Academy from the elements

Sat on the seafront in Pwllheli, North Wales, the Welsh National Sailing Academy and Events Centre boasts stunning architecture and design, but was a challenging build. Anglesey-based Weatherwell Roofing was contracted to waterproof the roof and walls, during a winter project that required the skilful application of a variety of Sika Liquid Plastics products.

Due to the location of the sailing academy, standing between the dunes and marina of Pwllheli, the main requirement of Ellis Williams Architects was to achieve a striking design that could withstand the elements. Any products used on the project would have to offer a flawless finish alongside durability and strength, backed by guarantees.

Sika Liquid Plastics’ liquid applied waterproofing systems fitted the bill and were specified across the building envelope. On the gabion walls, a Decothane Gamma 20 system was used, and on the concrete walls, a Sikalastic 618 15 year coating. All of the gabion walls were waterproofed down to the foundations of the building, with the liquid system seamlessly joining the walls to the roof areas. This created a 100% waterproof junction between the two, an extremely important factor for a building that must weather the coastal environment. In addition, Decothane has excellent elastic properties, making it UV stable and tolerant of thermal movement.

For the cold roofs, warm roofs and green roof area, totalling over 1000sq m, Decothane Delta 25 with applied on to various primed surfaces, from concrete deck to a mix of flat board and tapered Decotherm insulation. All the roof areas were covered by timer decking for use as viewing galleries and cafe seating areas, where a Sika Liquid Plastics protective layer was also used.

Kristian Lewis, Weatherwell company manager, said “We completed our portion of the project in 14 weeks, despite working through winter in very difficult conditions. Even in low temperatures we were able to expertly apply the Sika Liquid Plastics waterproofing membranes. The liquid applied nature of the products allowed us to get a great finish, even around the more complex detailing.

“It’s great to be involved in a project that will give so much back to the local community and open the door for new sailors in the area.”

The Sika Liquid Plastics technical team were on hand throughout the project to offer expert guidance, from initial design and specification to quality control during installation and final inspection, resulting in the issue of single point guarantees.

The National Sailing Academy, commissioned by Gwynedd County Council, secured funding of over £8m for its construction, in order to increase opportunities for the surrounding community and boost the local economy. The facility has been constructed to BREEAM ‘Excellent’ standards with sustainable features including biomass heating, solar panels and rainwater harvesting. Officially opened in the summer of 2015, the centre acts as a hub for national and international sailing events, as well as hosting a number of clubs and training activities.

Decothane is available throughout the UK from Sika Liquid Plastics. For further information visit http://gbr.liquidplastics.sika.com or call the Enquiry Line on 0800 112 3826.

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