Advantages of Cold Applied Roofing Systems Name Position Title DERBIGUM.

Advantages of Cold Applied

Roofing Systems

NamePosition Title

DERBIGUM.

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.

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.

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

What is Cold Applied Roofing?

Polymer-Modified Bitumen

Membranes

vs.

Cold Built Up Systems

Alternative to:

•Torch-applied systems with open flame

•Hot asphalt applied systems with use of a hot kettle

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

Cold Applied Roofing

•Employs polymer modified adhesive in conjunction with polymer-modified bitumen membranes

•Can be used with either APP or SBS systems

Composition of Polymer-Modified Adhesives

Asphalt Mineral Spirits Polymers Cellulose Fibers Fillers

Fillers

Asphalt

Cellulose Fibers

Base Asphalt

Petroleum Asphalt is the base of Cold Applied Adhesives

Characteristics Black Sticky Highly Viscous

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

Polymers

Types SBS APP IPP

Benefits Encapsulates the light

oils Increases the pliability

of the bitumen

Cellulose Fibers

Adds reinforcement to the adhesive

Provides strength to the “bonding layer” of the cold modified system

Fillers

Functional Increase Viscosity Adds Fire Retardant Improves UV

Resistance/Weatherability

Thixotropy Non-Functional

Add Bulk Reduces Product Cost

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

Thixotropy

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

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

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

Application Methods

5 Gallon Pails = squeegee 55 Gallon Drums = spray rig 350 Gallon Totes = spray rig

Application Methods

High Viscosity

=

Notched Squeegee

Lower Viscosity

=

Spray Rig

Application Methods

Squeegee Method Uses 5 gallon pails Efficient for small areas Downside = landfill

waste

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

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

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

Application Procedure

Relax Rolls Prior to Installation Prevents possible

wrinkling

Roofing Membranes Can Be Repositioned Prior to Adhesive Curing

Lap Welding Methods

•Only heat welding provides watertight application the same day

−Electric hot air & roll−Torch & Roll

Lap Welding

Torch & Roller

Lap Welding

• Electric Hot Air Welder

Lap Welding

Lap Welding

Finished Field Lap

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

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!

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

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

Benefits ofPolymer-Modified Adhesives

Health & Safety Accessibility Ease of Application Handling Protection Environmental


Health & Safety No Open Flame or

Fire Risk No Kettle No Skin Burns Limited Fumes &

Odor


Accessibility In tight constrained

areas on Roof-top High-rise buildings


Ease of Application Increased Labor

Productivity Smaller Crews Minimal Application

Equipment Forgiving of Application

Errors Clean Installation Year Round Application


Handling Transportation Storage Handling


Protection Redundant Ply’s Watertight Added Thickness


Environmental Low VOC Meets SCAQMD UL/FM Approved

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

QUESTIONS

Thank You!__________________________

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Advantages of Cold Applied Roofing Systems Name Position Title DERBIGUM.

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