Re: [GBlist] Low tech green roof

[John Salmen <terrain@shaw.ca>]

I know of a couple of roofs that have used polyethylene to good affect. The
problem however is not finding a material that works - but rather having to
find a material that is 'acceptable' for use. By acceptable I mean a
material that can be warranted, insured, etc. A green roof is still
fundamentally a roof which covers and protects all the construction,
furnishings and possessions underneath it.

Roof warranties are typically provided by the manufacturer, and generally as
a system - where all the components and assembly details are specified.
Variations on these details can void a warranty in the event of failure. You
also need to work with trades certified as installers, etc.  So the range of
materials and options available starts to shrink if the roof has to meet any
kind of specification for financing or insurance.

As cities implement green roof programs, the range of options available
increases but then so do the general requirements.

John Salmen
TERRAIN E.D.S.


----- Original Message -----
From: "David Del Porto" <daviddelporto@ecological-engineering.com>
To: <greenbuilding@crest.org>
Sent: Monday, November 26, 2001 8:01 AM
Subject: [GBlist] Low tech green roof


> For many years we have been using Raven Industries 40 mil Rufco EX 40
> linear low density polyethylene for our wastewater gardens.  It has
> withstood the attempts of bamboo rhizomes to puncture it and will not
> degrade if not exposed to UV.  While I know of no applications for green
> roofs I know of no reason why it should not be used.  The price is around
> $0.29 per square foot plus freight from their nearest plant, say South
> Dakota.  The web site is http://www.ravenind.com and the toll-free number
> is 800 635 3456.
>
> David Del Porto
> Ecological Engineering Group
> 50 Beharrell Street
> Concord, Massachusetts 01742 USA
> Phone:   1 978 369 9440
> Fax:       1 978 369 2484
> E-mail:    info@ecological-engineering.com
> Web:       http://www.ecological-engineering.com
>
>
> ______________________________________________________________________
> This greenbuilding dialogue is sponsored by REPP/CREST, creator of
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>


______________________________________________________________________
This greenbuilding dialogue is sponsored by REPP/CREST, creator of
Solstice http://www.crest.org, and BuildingGreen, Inc., publisher of
Environmental Building News and GreenSpec http://www.BuildingGreen.com
______________________________________________________________________