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FAQ

ELASTOMERIC COATINGS

Can I use Armor Coat on my roof?
What kind of energy savings might I get after applying Armor Coat?
Is Armor Coat available in colors other than white?
How often should my roof be recoated?
How can I tell the difference between good quality coatings and bad quality coatings?
What is elastomeric?
What is reflectivity?
What is emissivity? 
Are there any benefits to elastomeric coatings other than saving on my energy bills?
Are there warranties available on my roof when using Armor Coat? 

POLYURETHANE FOAM

What are the benefits from using sprayed polyurethane foam (SPF)?
What insulation (R-value) might I get from SPF?
What are the minimum and maximum thicknesses that foam can be sprayed on my roof?
What is foam density?
Can I leave my SPF uncoated? 

ELASTOMERIC COATINGS

 Can I use Armor Coat on my roof?

Armor Coat can be used on the majority of roofing surfaces. Call to discuss your specific application to be sure.

 What kind of energy savings might I get after applying Armor Coat?

Depending on the current condition of your roof, applying Armor Coat can reduce you roof temps by as much as 50 to70 degrees. With that said, there are many contributing factors to saving energy on your home or commercial building (i.e. doors, windows, directions of exposure, type of roof prior to installation etc.), but savings of 35% or greater are not uncommon.

 Is Armor Coat available in colors other than white?

Yes. For a small up charge, we can tint our topcoats to thousands of colors to closely match your desired color choice. Please keep in mind that the darker the color, the less energy savings you will see due to the fact that darker colors attract and absorb heat and UV rays, while lighter colors reflect heat and UV rays. It should be noted that darker colors also have a shorter life span due to the increased punishment they take from increased temperatures long term.

 How often should my roof be recoated?

The answer varies greatly depending on how heavy the coatings were initially applied. Generally speaking, most roofs will benefit from a recoat every 5-6 years.

 How can I tell the difference between good quality coatings and bad quality coatings?

This is a tricky question as there are many things to consider when trying to decide if a coating is good quality or not. Many box stores sell coatings with low volume solids or that are manufactured using resins that may not have been designed with your application in mind. Also many coating manufacturers try to mislead people by mentioning weight solids percentages rather than volume solids percentages. When looking for quality coatings you are generally better off sticking with products that are made out of 100% acrylic resins and with volume solids of at least 45% and preferably 50% or greater.

 What is elastomeric?

Elastomeric simply means that a coating has elasticity. This is the ability to stretch out, yet retain its original shape unlike taffy or bubblegum for example, which when stretched out stay stretched out and stringy. Traditional elastomeric coatings should have a minimum elasticity of 100% although most have much more than that.

 What is reflectivity?

Reflectivity is the ability for a product or coating to reflect the suns damaging ultraviolet light (UV) away from the surface, thereby not allowing the surface to increase in temperature. Initial reflectivity around 85-90% can be expected when dealing with quality, white elastomeric coatings. That means that 85 to 90% of the suns UV rays are reflected away from your roof surface, therefore reducing the amount of heat getting to your roof and trying to fight its way in to your structure.


 What is emissivity?

Emissivity is the ability of the coating to release any absorbed heat back in to the atmosphere rather than permeating through the coating to the deck surface. Any heat that isn’t allowed to reach the deck surface cannot heat up the interior of the structure, therefore reducing your HVAC burden and reducing your overall energy bills.

 Are there any benefits to elastomeric coatings other than saving on my energy bills?

Yes. While the substantial savings on your energy bills are a major factor when considering using elastomeric coatings on your roof there are many other important benefits. Spray in-place liquid coatings offer a monolithic (seamless) membrane over your entire roofing surface creating a water tight system to seal your roof from leaks. Beyond that, there are environmental benefits such as reducing the heat island effect caused by darker roofing surfaces that increase surrounding temperatures rather than decreasing them resulting in increased energy requirements and contributing to rolling brown outs. In addition, when applying maintenance systems such as Armor Coat, you allow your roofing surface to be maintained continually rather than eventually torn off and replaced with another roofing system. This greatly reduces the land fill burden with as much as 15% of land fill space taken by torn off roofing materials.

 Are there warranties available on my roof when using Armor Coat?

Yes. While the requirements vary from roof to roof, warranties may be available from 2 - 15 years. Certain restrictions will apply. Consult with your contractor for more information.

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Polyurethane Foam

 What are the benefits from using sprayed polyurethane foam (SPF)?

Not only does SPF conform to your roofing surface, sealing all areas from moisture and air, but it gives you excellent insulation compared to most other roofing materials.

 What insulation (R-value) might I get from SPF?

Most aged SPF gives an R-value of 6.3 per inch

 What are the minimum and maximum thicknesses that foam can be sprayed on my roof?

While the overall finished thickness of SPF should never be less than 1” thick, there is no maximum thickness. Obviously, the thicker the foam, the greater the isolative value.

 What is foam density?

Foam density is measured in pounds (i.e. 2.0, 2.5, 2.7 or 3.0 lb.) This measurement is figured when spraying under laboratory conditions and achieved when figuring on a 1 cubic foot square piece of foam. So a 1 cubic foot piece of 2.5 lb. foam would weigh 2.5 lbs. The higher the number, the more dense the foam and the more compressive strength it has to hold up to more foot traffic. When applying SPF for roofing needs a minimum 2.4 density should be used, but generally speaking, densities of 2.5 or 2.7 are used.

 Can I leave my SPF uncoated?

No. SPF is not able to withstand the damage caused by the sun’s UV rays. Left uncoated SPF can start to burn and break down within 72 - 96 hours. Generally it is recommended to apply a UV protective coating to newly applied coating within 48 - 72 hours.


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For additional information on coatings and cool roofs please read the following informative articles:

Cool Roofing Jargon (Interface magazine 9/02)
By: William A Kern 

A Practical Guide to White Coatings (Interface Magazine 2/07)
By: Steve Heinje and Tom Meyer

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