Roofing
tiles and membrane systems 
Refurbishing the roof of the UK
headquarters of the official worldwide IT partners
to the 2012 London Olympic Games was always going to
be a tough call but IMA-approved contractor
McCormick Flat Roofing completed the five-month
project on time, on budget and with no defects,
thanks to Icopal’s systems.
Main contractors ISG Interior Exterior PLC were so
impressed they awarded McCormick an additional
4,000m² using Icopal’s Sureweld TPO system that was
the mainstay of the original 3,300m² project. The
project also won McCormick the runner’s-up award in
the single-ply category at this year’s IMA
Contractor of the Year Awards.
The work was carried out at Triton Square, London,
home of the International Olympic Committee’s IT
partners Atos Origin and of the data centre for
northern Europe of JPMorgan Chase & Co, the leading
global financial services firm and investment bank.
Although the 179,000ft² building, managed by
Broadgate Estates, is vast the roof was a tight
space to work on for McCormick’s due to a circular
glazed atrium that took up most of the floor area
and a large amount of plant and equipment sited
around the perimeter. The 35-metre wide atrium was
reported to be the largest atrium over a trading
floor in Europe when the main tenant moved into the
building.
Work involved the complete removal of the existing
inverted roof, comprising pebble ballast, insulation
and paving slabs, using skips craned to the roof.
“We co-ordinated all cranes and trucks for the
removal of the existing roof coverings,” said
McCormick’s managing director Stewart McCormick.
The existing asphalt substrate, which had severely
ponded, was then cleaned off and concrete screeding
carried out to the worse areas to eradicate all
hollows. A vapour control layer was then applied
prior to fully bonding SLM insulation boards using
polyurethane adhesive.
SureWeld TPO fleeceback membrane was then fully
bonded to the insulation boards using SureWeld
fleeceback adhesive. Perimeter edges were treated
with a powder coated trim in a matching RAL colour
to the existing curtain walling and this was
weathered using SureWeld TPO PS cover strip.
Work was carried out over the winter and more than
500 penetrations made to the existing roof deck, to
allow concrete pads to be built to support the
steelwork bearers for air handling units, each of
which required detailed waterproofing using SureWeld
flashing.
“But not one leak was experienced throughout the
whole project,” said Stewart McCormick.
Sureweld TPO is a PVC-free membrane manufactured
from advanced Thermoplastic Polyolefin. This
provides the advantage of being able to demonstrate
the UV and heat resistance of EPDM rubber but has
the heat welding capability of PVC.
It is also inherently flexible and highly malleable,
even at low temperatures, making it an ideal choice
for complex roof designs. Durable and formulated for
the long-term, its reinforcement provides high
puncture and tear resistance, making it easy to
maintain years after installation.
The completed Sure-Weld TPO system is covered by a
20-year insurance-backed guarantee, has BBA approval
and FAA Fire Certification.
Email:
tracy@tlcpr.co.uk
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Editor's Note: Icopal Systems provide:-
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Icopal Systems - Turns In An Olympic Performance
Arundel Jones Associates Ltd News Categories : Roofing tiles and membrane systems |