NU-ROOF
Supporting the roofing SMEs in the development
and use of a new generation of roofing materials
applicable with fault tolerant procedures, reducing
the use of petroleum-based products
(Grant Agreement No. 243616)
TASK 1.1 & 1.2 FIRST FINDINGS
13th April 2010
D’Appolonia
Objective of the presentation: task 1.1 & 1.2
T1.1 COMPETITORS
AND TECH TRENDS
(Leader: DAPP)
T1.3 STANDARDS AND
LEGISLATION NEEDS
(Leader: STFI)
T1.2
CUSTOMER NEEDS AND
PROMISING MARKETS
(Leader: IFD)
Proactive
feed backs
T1.4 CONCEPT DESIGN:
TECHNICAL SPECIFICATIONS
AND MATERIAL DESCRIPTION
(Leader: TNO)
Proactive
feed backs
T2.1
T2.2
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T2.3
Waterproof membrane is part of many different flat roof
systems, each one with different requirements
Non trafficable roof: membrane must be heat reflective,
easy to clean, many colors, resist to wind and punctures,..
Green roof; membrane must be root resistant
Solar cells roofs: membrane must be like non trafficable +
allowing an excellent grip for solar cells
Heavy duty (car park decks, pedestrian,..): membrane
must be compatible with the external layers, very thick,
long rolls, flexible, extra strong, well fastened
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Since the 70’s the following technologies have been established
Roofing membranes
Bitumen membranes
BUR
Traditional
Plastic membranes
Single layer
Single layer
Modified
bitumen
SBS
APP
Thermoset
EPDM CR PIB
Bitumen based membrane are mainly of two typologies
both used in multi layers structures also defined as Built Up
Roofing (BUR) or in single layer:
– Traditional bitumen
– Modified bitumen based
Plastic Based membrane are mainly of two typologies
applied in single lay:
– Thermoset membrane
– Thermoplastic membrane
Spray Polyuretane Foam is a rigid, closed cell, spray
polyurethane foam insulation. The foam is composed of two
components: isocyanate and polyol. A second protective
layer, typically is a spray applied elastomeric coating
Liquid applied resins + reinforcement fleece:
Spray Polyurethane
Foam Based
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Thermoplastic
PVC
TPO
Liquid Applied
Resins
Emerging market needs* for waterproofing membranes (1)
* Sources: cool roof rating council; catalogues, interviews to NU roof5
project partners and roofing associations, users forums
Emerging market needs* for waterproofing membranes (2)
* Sources: cool roof rating council; catalogues, interviews to NU roof
project partners and roofing association, users forums
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Summary of Interesting Technology Trends
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Key players and interesting products
Carlisle offers a variety of EPDM, TPO, PVC membranes Carlisle also offers a
full line of roof garden systems and energy-saving polyisocyanurate insulation
to complement any membrane installation.
CCW MiraDRI 860/861 CCW MiraDRI 860/861 are self-adhering sheet
membranes consisting of 56 mils (1.4 mm) of rubberized asphalt laminated to
4 mils (0.1 mm) of polyethylene high-performance, extremely durable
waterproofing barrier, cost effective but not reflective
Single-ply PVC roofing system ideal for commercial or industrial
The Duro-Last vinyl roof membrane is a proprietary thermoplastic formulation
consisting of PVC resins, plasticizers, stabilizers, biocides, flame retardants
and U.V. absorbents. A weft-insertion knitted scrim that is laminated between
two layers of PVC film gives the membrane its strength and durability.
reflects 88% of the sun's energy
TPO and PVC technologies and insulation
When properly formulated, VERSIFY™ based TPO formulations allow for
faster installation with less room for errors versus incumbent TPO resins.
Excellent flame retardant incorporation
High temperature range Modified Bitumen membranes
“Diamond”: Elastoplastomeric BPP with spunbound polyester
reinforcement
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Key players and interesting products
DERBIGUM SP FR modified bitumen: 4mm-thick with 30 years guarantee
-A tough sheet of non woven polyester provides resistance to perforation.
- Just under the surface, a fiberglass layer protects against UV radiation while
assuring perfect dimensional stability.
- The bitumen is mixed with high-grade APP polymers to protect against aging
and UV radiation.
CertainTeed Flintlastic® SA is a premium, self-adhering
SBS modified bitumen roofing system comprising a
nailable base or self-adhering ply base with a top surface
designed to accept self-adhering membrane, a self-adhering mid ply and a self-adhering
cap sheet.
RubberGard™ EPDM
High flexibility and elongation: Firestone RubberGard EPDM remains
highly flexible even at temperatures down to -45° C and can also elongate
over 300% to accommodate building movements.
OTHERS
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Attachments
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Built-up Roofing (or BUR)
Built-up Roofing (or BUR) is the popular choice for roofing used on commercial, industrial
and institutional buildings.
BUR is used on flat or low-sloped roofs and consists of multiple layers of bitumen and
ply sheets. Components of a BUR system include the roof deck, a vapor retarder,
insulation, membrane and surfacing material.
The components are assembled at the job site to actually form the built-up roof. At the
heart of this roofing system is the roofing membrane, which consists of roofing
bitumen and multiple reinforcing plies of roofing felt.
Roofing bitumen is the primary adhesion/waterproofing agent used between roofing plies.
Bitumen arrives at the job site in solid form, but is heated and applied as a liquid. Roofing
bitumens may be either a product of petroleum refining (asphalts) or a product of the
coal-cooking process (coal tar pitch).
Multiple reinforcing “plies” are asphalt-coated roofing sheets or felts installed in
three or more layers to strengthen and stabilize the BUR membrane. These multiple
reinforcing felts also make the membrane more pliable and resilient, protect the bitumen
from water degradation, and serve as a fire-retarding element in the membrane system.
BUR roofing membranes can be protected from solar radiation by embedding gravel
in the bitumen, applying a surface coating or applying a granular-surfaced “cap” sheet.
Light-colored surfacing materials can be used to reflect heat from the building. In
addition, surfacing agents can provide additional fire protection.
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Modified bitumen membrane
Modified bitumen membranes -- MBS -- combine the features of a built-up roof with the
added tensile strength from its polymer modification. Using a reinforced sheet that is
prefabricated in the plant, modified bitumen systems require a less labor-intensive
application and can be applied cross-platform in both commercial and certain residential
applications.
A modified bitumen roofing system is composed primarily of polymer-modified bitumen
reinforced with one or more plies of fabric such as polyester, fiberglass or a
combination of both. Factory surfacing, if applied, includes mineral granules, aluminum
or copper. The bitumen determines the membrane's physical characteristics and provides
primary waterproofing protection, while the reinforcement adds strength, puncture
resistance and overall system integrity.
Factory-assembled, modified bitumen membranes undergo strict quality control
standards to ensure uniform thickness and consistent physical properties
throughout the membrane. The finished roofing system is usually a two- to four-ply
system consisting of a modified bitumen membrane and a base sheet, with additional
plies for added strength if needed. The substrate often determines which ply system is
best specified.
The finished roofing membrane may consist of one or more modified bitumen sheets,
or it may be comprised of a combination of built-up roofing (BUR) felts and one or
more modified bitumen sheets. The type of substrate and the performance objectives
influence the specification of the modified bitumen membrane system.
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Modified bitumen membrane
Modified bitumens generally use a traditional waterproofing medium -- asphalt -- modified
with atactic polypropylene (APP), styrene butadiene styrene (SBS), synthetic rubber or
other agents that create a uniform matrix that enhances the physical properties of the
asphalt.
SBS (Styrene-Butadiene-Styrene) modifies the asphalt by forming a polymer network
within the bitumen. SBS gives the bitumen rubber-like characteristics and improved
resistance to aging and weathering. Most SBS-modified bitumen sheets are either set
in hot mopping asphalt, torch-applied or adhered with cold-process adhesives. SBSmodified bitumen sheets that do not have factory applied granule or foil surfacing need
some form of field-applied ultraviolet protective coating.
APP (Atactic Polypropylene) is a thermoplastic polymer which forms a uniform matrix
within the asphalt. This enhances the bitumen’s performance by increasing its UV
resistance, increasing its flexibility at low temperatures and improving its flow
resistance at high temperatures. APP-modified bitumen sheets are generally applied
using a propane-fueled torch. Applicators use the heat to soften the modified bitumen on
the underside of the sheet. The sheet's bottom surface becomes a molten adhesive
which flows upon the substrate and then cools to form a waterproof adhesive bond.
Some APP sheets can also be applied with cold process adhesives.
Ref: http://www.asphaltroofing.org
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Thermoset (TS) membranes
Thermoset (TS) membranes incorporate principal polymers that are chemically cross
linked or vulcanized. Membranes that are vulcanized also may be referred to as “cured”.
One characteristic of true thermoset polymers is once they are cured, they only can be
bonded to similar materials with adhesives.
There are five common subcategories of thermoset roof membranes:
 Ethylene Propylene Diene Monomer (EPDM)
 Chlorosulfonated Polyethylene (CSPE)
 Epichlorohydrin (ECH)
 Neoprene (CR)
 Polyisobutylene (PIB)
The most common thermoset roof membrane is EPDM. EPDM principally is composed of
two compounds, ethylene and propylene, that are derived from oil and natural gas. The
following are some characteristics of EPDM roof membranes:
 Sheet widths range from 7.5 feet to 50 feet wide.
 Sheets are typically 1,5 to 2,5 mm thick.
 Seams are sealed using liquid adhesives or special formulated tape.
 The membranes commonly are black, but white is available.
REF:www.nrca.net
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Thermoplastic (TP) membranes
Thermoplastic (TP) materials can be repeatedly softened by heating or hardened when
cooled. Because of the materials’ chemical nature, thermoplastic membranes typically
are seamed by heat welding with hot air or solvent welding.
There are different common subcategories of thermoplastic roof membranes.
– Polyvinyl Chloride (PVC)
– PVC Alloys or Compounded Thermoplastics
– Copolymer Alloy (CPA)
– Ethylene Interpolymer (EIP)
– Nitrile Alloys (NBP)
– Tripolymer Alloy (TPA)
– Thermoplastic Olefin (TPO)
– Chlorinated Polyethylene (CPE)
Polyvinyl Chloride (PVC): PVC sheets are produced by calendering, spread coating or
extruding, and typically are reinforced with polyester or glass-fiber mats or scrim. PVC
sheets contain plasticizers and stabilizers, as well as other additives to impart flexibility
and achieve other desired physical properties. Some membranes are available with
nonwoven fleece backing adhered to the underside of a sheet.
– Sheet widths range from 6 feet to 12 feet wide.
– Sheets are typically 1,2 to 1,8 mm mils thick.
– Seams are sealed by heat or chemical welding.
– PVC membranes are produced in numerous colors, though gray and white are
the most common.
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REF:www.nrca.net
SoA : Interesting competitive technologies
DESCRIPTION: MiraCLAY membranes, manufactured by Carlisle Coatings and
Waterproofing (CCW)
REF: http://www.u15287495.onlinehome-server.com/Doco/brochureMiraclay.pdf
RELEVANT ASPECT for the project:
– Offers significant improvements over traditional bentonite cardboard panels
– combines the latest in geotextile technology with the proven waterproofing
capabilities of sodium bentonite.
– The Infrabond™ process thermally fuses the needle-punched fibers to the
polypropylene fabric.
– This locks the sodium bentonite into place regardless of incline or hydration
cycles, providing a permanently bonded membrane
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SoA : Interesting competitive technologies
DESCRIPTION: INSULATION MATERIAL COMPRISING PHASE CHANGE MATERIAL
(PCM) FOR BUILDINGS
REF: WIPO Patent Application WO/2007/082559 Applicant: MEINECKE, Bernd; (DE)
RELEVANT ASPECT for the project:
– Insulation material for the thermal insulation of buildings, in particular roofs
and/or walls, with at least one carrier material and at least one heat storage
material.
– Heat storage material comprises a phase change material (PCM), making
possible keep temperature fluctuations low even at the event of changing
climate conditions, for example due to different seasons or due to day and night
rhythm and, thus, to improve heat protection in summer as in winter times
Bulk material
PCM in form
of beads
Carrier material
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Heat storage
material
SoA : Interesting competitive technologies
DESCRIPTION: New 'Smart' Roof Reads the Thermometer, Saves Energy in Hot and
Cold Climates
REF: http://www.sciencedaily.com/releases/2010/03/100321203506.htm
RELEVANT ASPECT for the project:
– Scientists reported the development of a "smart" roof coating, made from waste
cooking oil from fast food restaurants, that can "read" a thermometer
– The coating automatically switches roles, reflecting or transmitting solar heat,
when the outdoor temperature crosses a preset point that can be tuned to the local
climate
– bio-based intelligent roof coating, compared with a
traditional cool roof, could reduce both heating and
cooling costs as it responds to the external
environment
– It will help save fuel and electricity and reduce
emissions of volatile organic compounds from
petroleum-based roofing products. In addition, it will
provide a new use for millions of gallons of waste oil
after it is used to cook
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SoA : Interesting competitive technologies
DESCRIPTION: SOY-BASED SEALANT FOR BUILDING CONSTRUCTION
REF: compendex:http://www.engineeringvillage.com (Author: Green Products LLC)
http://www.greenproducts.net/pages/roofingsolutions.htm
RELEVANT ASPECT for the project:
– Alternative solution to repair lacks
– The recent hike in oil prices has made a strong case for adhesives obtained
from natural materials
– Plant oil-based adhesives can cut down cure times
– advantages in elongation properties, low permeability, low-volatile organic
compound levels, and 100% resistance to stain, mildew, and molds and to
ultraviolet light.
– Applied in tandem with Environmental Liquid Membrane Systems ELMS
products that are designed for restoration of roofs and walls
– ELMS are applied by brush, roller, or conventional or airless spray equipment
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SoA : Interesting competitive technologies
DESCRIPTION:
performance
Experiment
of
geosynthetics
improving
asphalt
pavement
REF: www.engineeringvillage.com (author: Key Laboratory of Traffic Engineering, Beijing
University of Technology, China )
RELEVANT ASPECT for the project:
– prevent rutting and decrease water damage
– application research of four kinds of geosynthetics such as glass-fibre
geotextile, polyester-fibre geotextile, big-hole geogrid and small-hole geogrid
– Contrast reflective cracking defined as the propagation of cracks from the
movement of the underlying pavement or base course into and through the new
overlay as a result of load-induced and/or temperature-induced stresses.
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SoA : Interesting competitive technologies
DESCRIPTION: Solvent type heat insulation fluorocarbon exterior wall and roof
coating
REF: Patent : CN20081239554 20081212
RELEVANT ASPECT for the project: isolation coating which uses hollow glass microbeads, hollow ceramic micro-beads
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SoA : Interesting competitive technologies
DESCRIPTION: New DERBIGUM NT range
REF: http://www.derbigum.com/EN/EN_solutions-eco-solutions-NT.html
RELEVANT ASPECT for the project:
With the NT range, DERBIGUM introduces a new generation of ecological and sustainable
products generation, while anticipating the more demanding European directives.
The NT range is based on new compositions which reduce DERBIGUM’s impact on the
environment::
– No Volatile Organic Compounds (VOC): replacing solvents by vegetable oils
– Diminished CO2 emissions
– Diminished energy consumption aimed at membranes production
– Diminish the use of non renewable resources
– membrane durability remains
Products:
DERBIGUM NT  Ecological new generation roofing membrane Solution
DERBIBRITE NT  white reflective energy saving roofing membrane.
DERBICOAT NT  universal ecological underlayer
DERBIBOND NT  Ecological bituminous cold adhesive without solvants
DERBICLEAN NT  Ecological cleaning product
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