Aluminum Shake Roofing Details

The Energy Facts

1. According to a major trade magazine survey, energy efficiency is the number one concern of the majority of U.S. Homeowners; low maintenance is number two. The Perfection Aluminum Shake offers both energy efficiency and low maintenance.

2. Home heating and cooling costs are a primary part of total home energy costs.

3. Heat is transferred by conduction, convection and radiation. Insulation does not stop radiant heat, it takes a radiant barrier to do this.

4. Since the roof is closest to the sun, up to 90% of all summer attic heat gain is from radiation through the roof. Since heat rises, a great deal of winter home heat loss is through the roof. For true home energy efficiency, the roof must be a good radiant heat barrier.

5. Common roofing materials such as asphalt, wood, slate allow up to 90% of all radiant heat to pass through them, and are poor barriers.

6. Aluminum which has a low emissivity value of about 5% is an excellent radiant heat barrier.

STATEMENTS OF AUTHORITY ON ALUMINUM
 by
Gordon B. Wilks Ph. D.
(Heat Engineering Massachusetts Institute of Technology)

1. Aluminum reflects 95% of the radiant heat which strikes the surface.

2. Emissivity is the percentage of heat emitted or given off from a heated surface by radiation, aluminum has a low emissivity. It emits or radiates only 5% of the heat imposed upon it.

3. Emissivity values for surfaces at 100 degrees Fahrenheit:

Aluminum 0.07	Slate 0.67	Brass 0.21	Asbestos 0.93	Glass 0.90
Cast Iron 0.63	Marble 0.56	Roofing Paper 0.90	Sandstone 0.83

Note that of all the products listed, aluminum has the lowest emissivity.

4. Up to 80% of all heat transfers takes place by radiation.

5. Aluminum exposed to laboratory fumes, moisture, dust and salt water atmospheres shows that visual brightness is not essential to good performance. Aged and spoiled materials maintain reflectivity from 87.5% to 94.5%.

Explanation of the above paragraphs: Inasmuch as 95% of the heat rays imposed upon aluminum is reflected by the metal, then it follows that a house covered by aluminum will be cooler in the summer. Similarly, since 95% of the heat in a house in the winter is reflected back into the house, then a house will be warmer in winter.

Since 95% of the heat rays are reflected away from the house in the summer and 95% of the heat inside the house is reflected back into the house, then the metal itself only absorbs 5% of the heat imposed upon it and this 5% is likewise radiated away.

To reflect 95% of the heat rays, aluminum need not have a bright polished surface. Any surface, painted or otherwise, whether old or new, aged or covered with moisture and fumes, will reflect from 87.5% to 94.5% of the heat rays.

Perfection Color Chart

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Colors are not accurate representations due to the restictions of web graphics. To order a color chart, click here.

KynarŽ PVDF (Polyvinylidene Fluoride)
Important Properties of KYNARŽ Products
Chemical and solvent resistance UV light and radiation resistance Weathering resistance Fungi resistance	High mechanical strength and toughness High abrasion resistance High dielectric strength High thermal stability

Outstanding Characteristics of KYNARŽ Products

KYNARŽ has been used as a pipe liner in chemical processing plants since its introduction nearly 30 years ago. It has also been used extensively in the paper and paper pulp industries, where equipment is constantly exposed to high concentrations of Chlorine and Chlorine Dioxide. In these applications the permeation resistance of KYNARŽ components far surpassed that of PTFE.

KYNARŽ products are used extensively in silicon microcircuit fabrication. Processes in this industry commonly use deionized water, a fluid that is highly corrosive to steel. The deionized water is often sanitized through the injection of ozone and exposure to UV light, both of which can seriously degrade the integrity of materials less durable than KYNARŽ.

Medical device manufacturers selling to remote locations in the world have found that their customers demand reusable tube sets and equipment because the medical staff using these items cannot rely on a ready supply of disposable devices. Instead, the devices are disassembled, sterilized, and reassembled for reuse. To withstand such vigorous use, the products they demand must be physially strong, damage resistant, and resistant to multiple radiation or autoclave sterilization cycles. KYNARŽ is quickly becoming the material of choice for such workhorse applications, in spite of the fact that KYNARŽ components are initially higher in cost than other materials. Its incredible durability under harsh conditions renders it much more cost-effective for long-term use than its disposable plastic, Stainless Steel or PTFE counterparts. As the people of the world become more concerned with environmental issues such as recycling and resource management, the ability to reuse KYNARŽ components will play an increasingly important role in the Medical Device industry.

KynarŽ Holopolymer may be safely used in articles intended for repeated contact with food per Title 21, Code of Federal Regulations, Chapter 1 part 177.2510.

KynarŽ homopolymer has been tested and is in compliance with United States Pharmacopia (USP) Class VI.

KynarŽ is also approved by the National Sanitation Foundation (NSF) Standard 61.

KYNARŽ is a registered trademark of Elf Atochem North America, Inc.