epox-z cool roof
TRANSCRIPT
The Enhanced Cool Roof The Enhanced Cool Roof Coating Solution Coating Solution
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without written permission of EPOX-Z is prohibited
© EPOX-Z Corporation 2011
EPOX-Z NRGEPOX-Z NRG• Who is EPOX-Z Corporation?• EPOX-Z Corporation is a privately held manufacturer
and worldwide distributor of 100 % solids, solvent-free, zero VOC, epoxy-based coatings that are used for surface protection in a range of markets including roof restoration, marine, power generation, gas transmission, and wastewater treatment facilities. EPOX-Z’s coatings have exceptional surface tolerance and provide a high level of resistance to chemicals and moisture.
EPOX-Z NRGEPOX-Z NRG Why so much interest in Cool Roofs ?
COOL ROOFS EQUATE TO BIG BENEFITS TO THE BUILDING OWNER AND THE ENVIRONMENT
EPOX-Z NRG USER BENEFITSEPOX-Z NRG USER BENEFITS Improved Comfort because the building’s interior is subject to
less thermal flux and stays cooler during the warm season
Reduced Energy Costs because of reduced air-conditioning
Longer AC unit life resulting from decreased air-conditioning loads
Increased Roof Longevity due to reduced thermal flux of the roof
EPOX-Z NRG ENVIRONMENTAL BENEFITSEPOX-Z NRG ENVIRONMENTAL BENEFITS
Cool roofs are distinguished among energy conservation measures because of the many environmental benefits they can provide. This is attributed to the fact that they combat the urban heat island effect
The urban heat island effect is a phenomenon that is characterized by a measured increase in the ambient air temperature in cities over their surrounding rural areas. This is due to roofs and other non-reflective surfaces that absorb and trap solar radiation — or heat
The excess trapped heat is gradually released to the ambient air throughout the day, evening and nighttime hours, warming up the urban core round the clock. The effect results in an environmentally negative and spiraling impact, including:
EPOX-Z NRG MITIGATESEPOX-Z NRG MITIGATES
Increased demand for air-conditioning in both air-conditioned and un-conditioned buildings, thus increasing the potential for the installation of air-conditioners in buildings that currently don’t need them
Increased greenhouse gas emissions that contribute to global warming, released as a result of fossil fuel generated electricity to power air conditioners
Increased smog formation.
EPOX-Z NRG EPOX-Z NRG REDUCES HEAT ISLAND PROFILEREDUCES HEAT ISLAND PROFILE
EPOX-Z NRG – HOW IT WORKSEPOX-Z NRG – HOW IT WORKS Two thermal properties that characterize cool roofs are solar
reflectance and thermal emittance
A cool roof minimizes the solar heat gain of a building by first reflecting incoming radiation and then by quickly re-emitting the remaining absorbed portion
As a result, the cool roof stays cooler than a traditional roof of similar construction
EPOX-Z NRG HOW IT WORKSEPOX-Z NRG HOW IT WORKS
EPOX-Z NRG – IS IT RIGHT FOR YOU?EPOX-Z NRG – IS IT RIGHT FOR YOU?
Have you defined your requirements for your cool roof projects?
The Basic Questions to Ask • Does this Cool Roof Coating meet the DOE Requirements?• What is its weatherability/durability?• What is the testing data?
EPOX-Z NRG EPOX-Z NRG PERFORMANCE CHARACTERISTICSPERFORMANCE CHARACTERISTICS
To be effective any cool roof coating must first act as a barrier to prevent chemicals and moisture from reaching the roof surface
In general, the more permeable a coating is to the passage of moisture as is typical of many water-reducible coatings, the greater its affinity for water and the greater the increase in transmission when tested in and exposed to high humidities …ASTM D 1653
Performance characteristics of coatings can be evaluated by laboratory
protocol
Specifically ASTMD 1653 for Permeability, ASTM D 714 for blistering and ASTM D 4214 for degradation or chalking
EPOX-Z NRGEPOX-Z NRGPERFORMANCE CHARACTERISTICSPERFORMANCE CHARACTERISTICS
ASTM D 714:Resistance to chemical or water penetration. Ratings are 1-10 with10 representing no visible signs of blistering which is the highest/best rating
ASTM D 659 with the standard having four ratings: No. 2 (severe chalking), No. 4 (moderate to severe chalking), No. 6 (moderate chalking), and No. 8 (light chalking).
ASTM D 1653 Permeability Coatings with ratings <1 are considered impermiable
EPOX-Z NRG RESISTANCE TO ATTACKEPOX-Z NRG RESISTANCE TO ATTACK
• The average pH of rainfall in New York State ranges from 4.0 to 4.5, which is up to 30 times more acidic than "normal."
• Acid deposition also damages building materials by eroding the ornamental facades, statuary and other vulnerable edifices that are an important part of our heritage.
EPOX-Z NRGEPOX-Z NRG
EPOX-Z NRG – ISSUES TO AVOIDEPOX-Z NRG – ISSUES TO AVOID
THE MAJORITY OF COATINGS USE WATER OR VOC LADEN SOLVENTS AS THE VEHICLE TO MAINTAIN THE COATING IN A LIQUID STATE SO THAT IT CAN BE TRANSFERRED FROM THE CONTAINER TO THE SURFACE.THE DRYING
PROCESS RELIES ON SOLVENT OR WATER EVAPORATION
VOC’S ARE HARMFUL TO THE ENVIRONMENT AND ARE ALSO DETRIMENTAL TO THE COATING’S PERFORMANCE.
THESE COATINGS MAY NOT BE ABLE TO ALLOW THE SOLVENTS OR WATER TO FULLY EVAPORATE RESULTING IN BLISTERS,VOIDS, PINHOLES OR SOFT SPOTS IN THE COATING
FAILURES TO AVOIDFAILURES TO AVOID
While coating failures may occur for number of reasons, they can generally be categorized into three main groupings:
1.Coating manufacturer related or caused 2.Owner/specifier related or caused 3.Coating applicator related or caused
FAILED ELASTOMERIC COATONGFAILED ELASTOMERIC COATONG
PRIOR FAILED ART - ALUMINIZED COATINGPRIOR FAILED ART - ALUMINIZED COATING
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