advantages of cold applied roofing systems name position title derbigum
TRANSCRIPT
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Advantages of Cold Applied
Roofing Systems
NamePosition Title
DERBIGUM.
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AIA/CES
DERBIGUM is a Registered Provider with The American Institute of Architects Continuing Education Systems.
Credit earned on completion of the program will be reported to CES Records for AIA members.
Certificates of Completion for non-AIA members are available on request.
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AIA/CES
This program is registered with the AIA/CES for continuing education.
As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product.
Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
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Learning Objectives
Upon completion of this program, participants will be able to:
Define Cold Applied Roofing Identify the key composition of Polymer Modified Cold
Adhesives Recognize the types of Cold Applied Roof Systems
and their advantages. Understand the application methods Acknowledge the precautions when using Cold
Applied Systems
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What is Cold Applied Roofing?
Polymer-Modified Bitumen
Membranes
vs.
Cold Built Up Systems
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Alternative to:
•Torch-applied systems with open flame
•Hot asphalt applied systems with use of a hot kettle
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Traditional Hot Applied System / Oxidized Asphalt
Oxidized Asphalt Introduction of oxygen
to flux Benefits
Increases softening point
Increases utility of asphalt
Problems Decreases thermal
fatigue cycle Increases brittleness and breakdowns
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Cold Applied Roofing
•Employs polymer modified adhesive in conjunction with polymer-modified bitumen membranes
•Can be used with either APP or SBS systems
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Composition of Polymer-Modified Adhesives
Asphalt Mineral Spirits Polymers Cellulose Fibers Fillers
Fillers
Asphalt
Cellulose Fibers
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Base Asphalt
Petroleum Asphalt is the base of Cold Applied Adhesives
Characteristics Black Sticky Highly Viscous
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Solvents vs. Mineral Spirits
Solvents Hot solvents create
quicker set Toluene Xylene
Mineral Spirits Mineral spirits slower
set Less damage to
roofing membrane Higher Flashpoint =
Safer Application
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Polymers
Types SBS APP IPP
Benefits Encapsulates the light
oils Increases the pliability
of the bitumen
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Cellulose Fibers
Adds reinforcement to the adhesive
Provides strength to the “bonding layer” of the cold modified system
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Fillers
Functional Increase Viscosity Adds Fire Retardant Improves UV
Resistance/Weatherability
Thixotropy Non-Functional
Add Bulk Reduces Product Cost
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Thixotropy
Thixotrophy is a fluid that becomes less viscous under shear Ketchup is Classic Example
It is thick when sitting in a jar but when you shake the bottle it breaks down and flows more easily
Advantages for Cold Adhesives that are Thixotropic: Easily Spreads or Sprays More Contact with Membrane Prevents Slippage of Membrane Won’t Soak into Into Insulation/CoverBoard Holds Limestone in Suspension No Need to Stir Before Use
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Thixotropy
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Thixotropy
Thixotropic
1 10 -1 2 10 -1 5 10 -1 1 10+0 2 10+0 5 10+0 1 10+1 2 10+1 5 10+1 1 10+2 2 10+2 5 10+2
+35 10
+36 10
+37 10
+38 10
+39 10
+41 10
+42 10
+43 10
+44 10
+45 10
+46 10
+47 10
Shear rate 1/s
Vis
cosity c
P
J:\2014 batches\1052 5/5/2014 Viscosity cb2 3/25/2014 Viscosity
0
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Types ofPolymer-Modified Adhesives
Water-based Not good for roofing
adhesion Dissolves when
introduced to moisture Designed as an
interior adhesive
Solvent-based Withstands moisture Designed for exterior
building envelope use
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Types ofPolymer-Modified Adhesives
High Solvent / Low Solid Toxic / High VOC Lower Softening Point Unable to walk on 55% Stays Behind
High Solid / Low Solvent Low VOC Higher Softening Point User/Environmentally Friendly 82% Stays Behind Meets SCAQMD and other
OTC Requirements
SolventSolvent
Solids Solids
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Application Methods
5 Gallon Pails = squeegee 55 Gallon Drums = spray rig 350 Gallon Totes = spray rig
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Application Methods
High Viscosity
=
Notched Squeegee
Lower Viscosity
=
Spray Rig
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Application Methods
Squeegee Method Uses 5 gallon pails Efficient for small areas Downside = landfill
waste
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Application Methods
55 gallon drums Easy to transport Landfill waste
Option to line drum in order to upcycle/recycle
350 gallon totes Reusable Harder to transport
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Climate / Temperature Considerations
Cold Adhesive must be applied at: A minimum of 65
o
F for squeegee application100
o
F - 110o
F for spray application
Achieved with use of mastic heater
Cold weather recommendations:Hot Box on Roof, Stair
Tower, Elevator Room
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Application Considerations
Mastic Thickness Too thick
Damages membrane
Delays cure time Too thin
Improper adhesion
Normal Application Rate 1.5 – 2 gallons/sq.
membrane to membrane 2– 2.5 gallons/sq.
membrane to substrate
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Application Procedure
Relax Rolls Prior to Installation Prevents possible
wrinkling
Roofing Membranes Can Be Repositioned Prior to Adhesive Curing
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Lap Welding Methods
•Only heat welding provides watertight application the same day
−Electric hot air & roll−Torch & Roll
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Lap Welding
Torch & Roller
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Lap Welding
• Electric Hot Air Welder
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Lap Welding
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Lap Welding
Finished Field Lap
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Cure Time
Cure times vary dependent on: Ambient conditions Roof configurations and orientation
Generally between 24 and 72 hours Watertight once laps are torched or heat
welded
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Considerations
Not all adhesives are interchangeable between APP & SBS
Modified Bitumen membranes MUST have sand or liquid talc parting agent
Polypropylene parting agent WILL prevent adhesion
Polypropylene parting agent sheets are for TORCH USE ONLY!
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Considerations
Membrane “peel” is more of concern than uplift during cure time
Eliminate foot traffic on new membrane if a “high solvent adhesive” is used
Damages membrane surface Displaces adhesive SBS more susceptible to surface damage than APP due
to lower softening point
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Considerations
Minimize odor from entering building•Stage products downwind of the building, vents and air intakes•Schedule work near air intakes when building in unoccupied•Close or cover intakes only as needed•Building Manager should communicate with building occupants
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Benefits ofPolymer-Modified Adhesives
Health & Safety Accessibility Ease of Application Handling Protection Environmental
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Benefits ofPolymer-Modified Adhesives
Health & Safety No Open Flame or
Fire Risk No Kettle No Skin Burns Limited Fumes &
Odor
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Benefits ofPolymer-Modified Adhesives
Accessibility In tight constrained
areas on Roof-top High-rise buildings
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Benefits ofPolymer-Modified Adhesives
Ease of Application Increased Labor
Productivity Smaller Crews Minimal Application
Equipment Forgiving of Application
Errors Clean Installation Year Round Application
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Benefits ofPolymer-Modified Adhesives
Handling Transportation Storage Handling
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Benefits ofPolymer-Modified Adhesives
Protection Redundant Ply’s Watertight Added Thickness
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Benefits ofPolymer-Modified Adhesives
Environmental Low VOC Meets SCAQMD UL/FM Approved
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Drive for Cold Applied
• Insurance Companies• High Rise Buildings• Low odor/no smoke• No open flame• Increased productivity • LEED/RoofPoint• EPA Clean Air Act• Job site housekeeping• Additional waterproofing layers• User friendly • Application Options• Compatible with any size job
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QUESTIONS