A range of products from BMI Sealoflex were chosen for the challenge of refurbishing Pier 6 at Heathrow’s Terminal 3.
Originally built in 2006, Pier 6 is designed for the Airbus A380 superjumbo, so the scale of the project was massive – 6300sq m of roof. The main contractor, Mace, appointed Itech Roofworks to remove the existing single ply, replace damaged sections of plywood, build bunding and subsequently weatherproof with the Sealoflex Ultima liquid system.
A working airport such as Heathrow needs products that can be installed without affecting its operations, so Sealoflex solvent-free liquid-applied waterproofing and FireSmart Pyrobar Carrier Membrane were specified. Sealoflex Ultima is virtually odourless when it is applied while FireSmart Pyrobar is self-adhesive and can be installed very quickly once the existing single-ply membrane is stripped out.
Use of the Pyrobar Carrier layer permitted a swift removal and replacement of the existing single ply, constantly maintaining the waterproofing integrity of Pier 6. Even when weather stopped the roofing teams working on-site, Itech Roofworks would look to pre-laminate replacement sections of plywood to minimise any lost time and future interruptions.
Ideal for situations where a site is operational during roofing works, Sealoflex Ultima solvent-free liquid-applied waterproofing is virtually odour-free so there is no disruption to the use of the building It is also very flexible, so that awkward penetrations to plant and equipment supports are easily waterproofed, and it benefits from wet-on-wet application, allowing faster application as the primary waterproofing elements can be applied in a single operation. The result is a robust and seamless surface finish.
Simple to install, Pyrobar Underlay will waterproof exposed areas very quickly, so it lends itself to re-roofing projects where the existing membrane build-up is stripped out. This polyester reinforced SBS-modified bituminous membrane features an upper surface that is finished with Red Syntan acrylic coating. This coating reduces the weight of the material, making it easier to handle on-site whilst also providing the ideal surface to receive the Sealoflex Ultima liquid waterproofing system.
The scale of the project meant setting up five teams, a total of 50 operatives, on both day and night shifts, every one of whom walked more than 10 km each day. Their task was also complicated by the plant rooms on the roof which meant they had to work around and under all the pipework and ducting, often on their hands and knees.
The night shift stripped out the existing mechanically-fixed single-ply and installed FireSmart Pyrobar Carrier Membrane to the existing plywood substrate to create a weatherproof roof. The day shift then applied Sealoflex Ultima solvent-free waterproofing membrane if weather permitted or prefabricated the replacement sections.