Eco-Roofs Brochure and Specifications PDF - Eco-Roofs Green ...

Eco-Roofs’
Slip Sheets, Protection Fabrics
and other Materials
Eco-Roofs is not a fabric specialist so we make no
claims on these products other than what we see in manufacturer’s
specifications. We offer these fabrics as a service
to our customers and do not require you to purchase them
from us even if they are required for your project. Typical
uses and our recommendations are noted below. Please call
if you have questions or if you need manufacturer’s spec
sheets.
The fabrics are arranged in the order in which they
would typically be used starting with the lowest layer and
working up away from the roof.
Root Barrier 30 or 40 mil LLDPE or HDPE
Plant roots can sometimes be aggressive in their quest for nutrients, moisture and to provide stability. This can lead
them to work their way into roofing membranes and the roof deck where they could potentially create leaks or possibly even
structural damage. This is rare especially if just Sedum plants are used as they have very shallow and non-aggressive roots
but the added protection may still be desirable. Root barrier material is similar to a pond liner.
Eco-Roofs recommends the use of this material under tray systems. It should definitely be used as the base layer of
built-up systems. It is impermeable, moisture will not go through it so it must be the bottom layer, directly on top of the
waterproofing membrane. Caution should also be used to avoid trapping moisture under it where it will have no way of
evaporating. In order to provide complete root barrier protection the seams should be sealed, bonded or taped. Adequate root
barrier protection can be obtained using a minimum 24” seam overlap in place of seam sealing. See manufacturer’s recommendations
for proper seam application.
When used for root barrier protection there has been no performance difference shown between LLDPE (linear low
density polyethylene) and HDPE (high density polyethylene.)
A root barrier is sometimes the lower layer of composite drain board material (see below.)
Per specifications or with the recommendation of roofing membrane manufacturers or roofing specialists an LLDPE/
HDPE root barrier may be substituted with a heavier material such as TPO or a “throw-away” layer of membrane.
TRAYS: Premium recommendation for slip sheet/protection fabric under the trays.
BUILT-UP: Lowest, base layer directly on top of the waterproofing membrane usually below the drainage layer.
Slip Sheet/Protection Fabric
8 oz. Non-Woven Geotextile
Non-woven geotextile is a felt-like material used to
provide a minimum layer of protection over the waterproofing
membrane. Eco-Roofs recommends the use of
this material as a minimum protection layer under all of
our tray systems. It is not usually used in built-up systems.
Order extra to allow for a 12” seam overlap. Non-woven
geotextile does not provide any root barrier protection.
TRAYS: Minimum recommendation for slip sheet/
protection layer under the trays.
BUILT-UP: Not usually used.
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Supplies