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A new dimension in water management
Lisbon Feb 24th, 2011
What is VYDRO® ?
Extremely lightweight hydrophilic polyurethane
foam, with exceptional water retention
capacity (up to 30 times its own weight) and
capability to be used as growing media.
Extensive Intensive
What is VYDRO® ?
Extremely lightweight hydrophilic polyurethane
foam, with exceptional water retention
capacity (up to 30 times its own weight) and
capability to be used as growing media.
Extensive Intensive
How does VYDRO® foam work?
How does VYDRO® foam work?
Due to the physical, internal
structure of VYDRO® foam,
water molecules can easily
enter its cells but cannot easily
exit it. This means that water is
stored in the VYDRO® matrix,
where it can be readily
accessed by plant roots.
Properties & Benefits
Properties of VYDRO®
Up to 70% lighter than existing technologies (30 kg/m³)
Can take up to 30 times its weight in water
Water buffering capacity of 40 – 60%
Water draining: 65% still left after 24 hrs
The foam swells ± 15% after 24 hrs of soaking
Benefits
Easy to handle / install
Increased roof life
Suitable for old buildings with structural weaker roofs
Ability to rehydrate over multiple growing cycles
Improved building insulation, reducing heating and cooling costs by up to 5%.
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10
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10 30 40 60 80 100 120 140
Thickness (mm)
Wate
r rete
ntio
n a
fter 1
hr (l/m
2)
Linear (Without load)
Linear (With load 0.5kPa)
Determination of water retention of VYDRO foam
Source: TBU (Institut fuer Textile Bau und Umwelttechnik) - Germany
70 l/m2 water capacity with 11 cm of VYDRO®
Typical Extensive Green Roof
How does a typical green roof differ from a VYDRO® foam green roof?
Typical Extensive Green Roof
How does a typical green roof differ from a VYDRO® foam green roof?
The Build Up
Root resistant foil
PE foil
VYDRO® substrate
4 cm thick foam matt
Eggshell slabs for water management
Lava stones
4 cm layer of a blend of different particle sizes
Fully compacted still 15% of cavities
Plants
Sedum
Grasses
Other plants
On the roof: the installation
Eggshell slabs Root resistant foil
Easy cutting and
installation
Sedum, grasses, plants, …
Substrate Spraying
Total View
Final Look
Disclaimer
The slides following hereafter contain information that is confidential and proprietary to
Huntsman Corporation. Recipients of this presentation and the information contained herein
shall not copy or replicate them by any means whatsoever and shall not share or show them
to third parties.
While the information contained herein is to the best of our knowledge, information and belief
accurate at the date of publication, it is the responsibility of recipients to determine the
applicability or the suitability of such information for their own particular purpose. Huntsman
Corporation accepts no responsibility for any damages of any nature resulting from the use of,
reliance upon, or the misuse of such information for any purpose.
VYDRO is a registered trademark of Huntsman Corporation or an affiliate thereof in one or more, but not all, countries
