Project1_Layout 1 07/05/2013 CLADDING & SHEETING
SFS provides a single
secret fi x solution for
Cembrit rainscreen range
High-gloss Proteus HR soffi t panels and
rainscreen cladding have been used on a
futuristic Grade A offi ce redevelopment next to
Heathrow airport, London.
4 Longwalk in Stockley Park has remained
faithful to the original Arup-designed building,
with a new entrance, atrium and roof soffi t
featuring Proteus HR high-gloss panels in RAL
7004 signal grey.
Identical Proteus HR high-gloss panels
were used at the rear of the building to create a
vertical band of rainscreen cladding that runs up
the building over a stair core and ground level
entrance and walkway.
The Proteus HR soffi t panels, specifi ed
by Barr Gazetas architects, reportedly form a
striking, refl ective underside of the large 19m
cantilevered roof that shelters the front forecourt
and vehicle drop off point.
Proteus design staff reportedly engineered the
soffi t system to achieve the optimum outcome for
the client, architects and installer. This involved
increasing the thickness of the aluminium skin
on the soffi t panels, enabling its span to be
maximised in line with the architect’s brief.
Increasing the panel skin thickness also
050 MAY 2018 RCIMAG.COM
An illustration showing how the SFS TUF-S rivet
provides a mechanical secret fi x for rainscreen
had the effect of minimising the structural
requirement on the soffi t system, meaning Proteus
was able to optimise material usage to meet the
overall budget set for this element of the building.
Each soffi t panel is supported by the Proteus
aluminium carrier system and ancillary
components. All Proteus HR cladding and
soffi t panels are designed with tight radii at the
edges for superior sightlines. It is anchored to
the cantilevered roof structure with invisible
fi xings, accentuating the sheer, smooth highgloss
A link with the original Arup building design
is said to be maintained through a large circular
penetration that is punched through the projecting
roof, which also creates additional light and
space. Proteus assisted during design, detailing
and installation of this circular aperture to ensure
it integrated perfectly with the soffi t.
The design team at Proteus Facades worked
with Deepdale Solutions, the cladding and soffi t
installer, to create an engineered solution on
this project, with ‘visual purity’ of the soffi t
and rainscreen cladding being the overall
“We felt that the tone set by the high-gloss
fi nish on the Proteus HR soffi t panels achieved
the aesthetics we were seeking on this project,”
said a spokesperson from Barr Gazetas.
“The Proteus HR system with a RAL 7004
signal grey gloss fi nish accentuates the full
quadruple height reception area, increasing the
impact and presence of the entrance in keeping
with the scale of the building.”
Proteus HR is an integrated modular
rainscreen system with an aluminium
honeycomb core, structurally bonded between
two thin gauges of lightweight metal skin to
create an optically fl at panel. It is available in
steel, aluminium, zinc, stainless steel, copper
alloys and other materials.
Prater to work on regeneration project
Specialist contractor, Prater, has been
appointed by Lendlease to deliver an
extensive external envelope package,
including façade glazing and cladding,
along with steel framing systems and
a PermaQuick hot melt waterproofi ng
system to the roofs and podium, for
The Timberyard Deptford – a new
regeneration project in London.
Set to begin on-site this month,
Prater’s scope of works to the
façade will predominantly include
various glazing systems comprising
a combination of curtain walling
and aluminium composite windows,
along with Steel Framing Systems
(SFS) to support a traditionally-built
Providing high thermal insulation,
the cost-effective, lightweight frame
01992 801927 www.almhm.co.uk
backing structure will help both the
speed of construction and aid quality
assurance. In addition, further façade
scope will feature a lightweight zinc
rainscreen cladding system.
Across the project, Prater’s works
will also include the roofi ng elements,
which will comprise of a PermaQuick
hot melt waterproofi ng system.
Shane Blackett, pre-contracts
manager at Prater, said: “A
collaborative working ethos plays
a fundamental role in our ability to
deliver high-quality work on major
projects such as this. “Once again,
we are delighted to be working with
Lendlease and look forward to work
getting underway very shortly.”
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