ISO Chemie tape builds on
success at major research project

ISO-Chemie’s expanding foam tape has been specified for a
major research project at the University of Bath looking into
the feasibility of constructing buildings from straw bales.

ISO BLOCO One is being used to provide
a high performance airtight, acoustic and
thermal seal between the straw-filled,
cassette-style building blocks used to
construct the two-storey BaleHaus at Bath
on the University’s campus.

The BaleHaus is a research building
constructed using the ModCell system to
assess the use of straw as an efficient,
effective and long term building material.
The system utilises the excellent thermal
insulation qualities of straw bale and
hemp construction to form prefabricated
panels which can allow superinsulated,
high-performance, low energy ‘passive’ buildings to be constructed using
renewable, locally sourced, carbon sequestering materials. This means that
buildings can be constructed to meet the demanding PassivHaus specification,
with resultant zero heat requirements, saving money and CO2 emissions.

















Strips of ISO BLOCO One have been installed in the 10 mm expansion joints
between the 3 m² bale blocks to form a 0.86 m³/hour/m² measured at 50 pascals
air tight seal - the construction industry norm is anything between 3 – 5 m³/hour/m².

ModCell, which has a number of other research buildings around the UK, is
three years into an extensive four year programme of development supported
by funding from dBERR (formerly the DTi), Carbon Connections and the
Technology Strategy Board. This work has already confirmed ModCell, and
buildings like the BaleHaus, can perform to, and exceed, the standards required
in mainstream construction. Finlay White, marketing and operations director at
Bristol-based ModCell, said: “ISO-BLOCO One is an excellent product, meeting
the requirements for an easy-to-install, cost effective and very reliable all round
sealing solution.”

Peter Thompson, ISO Chemie’s UK general manager, said: “Increasingly, systems
like Modcell are being considered as low cost, practical and very sustainable
building products for construction projects. “So, for us to be involved is a major
coup and an endorsement of the high performance and multi-purpose solution
offered by ISO-BLOCO One.”

ISO BLOCO One offers a single product ‘fit and forget’ solution for fast and
effective sealing based around the European RAL principles of three level
sealing - the inside seal area is more airtight than the external one, allowing
any trapped moisture inside the joint, or within the wall, to escape outwards
rather than into the building.

The external seal area provides weather resistance and breathability, while
the intermediate seal area provides extra thermal and acoustic properties
and the internal one air tightness and humidity regulation. All three levels
are designed to accommodate movement between the adjacent materials.

Quick and easy-to-apply, the self-adhesive ISO BLOCO One provides a high
performance seal for window and door joints up to 30 mm wide and is
impermeable to driving rain at a minimum of 1,000 Pa – 66 % higher reliability
than most conventional joint sealing tapes.

The internal air tight seal has been tested at 1000 Pa pressure difference
(20 times more than UK Building Regulations.) and found to give less than
0.1 m³ of air loss. At the same time, depending on tape width, it will also
supply a U-Value of 0.55 and reduce sound by 45 dB, straight from the box.

Once installed, ISO BLOCO One ensures a building is better protected from
elemental factors like wind, dust and moisture ingress by accommodating the
changes in structural movement caused by environmental, cyclical and
settlement factors. Product complies with energy saving regulations (EnEV) on
windows and doors as well as the RAL quality assurance association and is able
to accommodate extremes of temperature changes – from -30 °C to + 80 °C.

ISO-Chemie is one of Europe’s main producers of impregnated foam sealants,
specialising in the manufacturer of foam products from polyethylene (EPE),
polypropylene (EPP) and polyurethane (PUR) using the latest production
techniques.

The company’s UK technical and distribution operation is based in the North
East of England, supported by a dedicated logistics service to ensure customer
orders are completed as quickly and efficiently as possible (usually next-day
delivery).

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More at www.iso-chemie.co.uk
Tel: 01207 566874
Email: p.thompson@iso-chemie.co.uk

© 2010 ISO-Chemie GmbH                                                                  04/2010