The main Tower
from across the
Welsh Harp
OVER 13 SCHÖCK PRODUCT
VARIANTS AT HENDON WATERSIDE
Minimising energy use in buildings, by improving thermal performance
of the building envelope, has become increasingly important in the
drive for sustainability and energy efficiency.
And the prevention
of thermal bridging is critical with structural attachments such as
balconies. Ineffectual insulation at the connection points means
local heat loss, with more energy being required to maintain the
internal temperature of the building. And while this is an important
aspect of thermal bridging, there are other issues. Low internal
surface temperatures in the area of the thermal bridge can cause
condensation. Leading not only to structural integrity problems with
absorbent materials such as insulation products or plasterboard,
but the potentially serious occurrence of mould growth. So for any
large-scale project involving a variety of different balcony types, the
prevention of thermal bridging is particularly important.
HUNDREDS OF VARIANTS IN THE ISOKORB RANGE
The many balconies involved vary in their design demands and to
ensure that thermal bridging is minimised, Schöck has supplied over
thirteen different product variants.
As the leading international
supplier of structural thermal breaks, Schöck has a solution to
practically every connectivity detail with the hundreds of variants
available in its Isokorb range. The products at Hendon are for concrete-
to-concrete and provide optimum solutions by using varying tension
bar arrangements. For example, one type provides cantilever balcony
connections and transfers both negative moments and positive
shear forces.
Another is a load-bearing thermal break element for
transferring shear forces on supported balconies, recessed balconies
and for occasional peak shear forces. Others transfer positive shear
forces with point support, or transfer positive shear forces with point
support and zero stress connection.
TOTALLY VERIFIABLE PERFORMANCE
In addition to concrete-to-concrete, the comprehensive Isokorb range
also offers solutions for concrete-to-steel and steel-to-steel – and even
a maintenance free alternative to wrapped parapets. A requirement
that the temperature factor used to indicate condensation risk (fRSI)
must be greater than, or equal to, 0.75 for residential buildings, is easily
met by incorporating the Isokorb. The range also complies with the
Government Standard Assessment Procedure, SAP 2012, concerning
CO2 emissions from buildings and respectively heat losses through
non-repeating thermal bridges. Products meet full compliance with
the relevant UK building regulations, have NHBC approval and offer
LABC Registration. There is also the security of independent BBA
Certification.
For a free copy of the Schöck Thermal Bridging Guide; the Schöck
Specifiers Guide or to view the range of downloadable software,
contact Schöck on 01865 290 890 or visit the website at
www.schoeck.co.uk
CHALLENGING VARIETY OF BALCONY TYPES
One current project with a challenging variety of balconies is Hendon
Waterside in North West London, a mixed tenure development.
Situated alongside the Brent Reservoir (known locally as the Welsh
Harp after a public house which used to stand nearby), the scheme
involves the regeneration of a 1960s housing estate being built in six
phases and scheduled for completion in 2027. The masterplan will
deliver around 2100 new homes consisting of social, affordable and
private housing. These are being constructed in twenty-three blocks,
varying in height from three to twenty-three storeys – along with an
imposing tower building of twenty-eight storeys. Also planned are
new public parks, a primary school, community centre and commercial
space for small cafes or shops.
One of the
Isokorb types
used at Hendon
Waterside