Alunar® Coating System

The Alunar® Coating System is an innovative approach to protecting residential metal roofs from the elements. It utilizes a complex combination of materials engineered to reflect solar energy, reduce surface temperature and protect against corrosion. Not only does this provide superior protection for your roof, but it also reduces cooling costs due to decreased heat absorption.

Alunar® Coating System Advantage

• LEED 29 standards compliant
• Harder and more flexible than other premium PVDF coatings on the market
• Cool Roof pigments deflect UV rays to lessen the heat island effect
• Environmentally friendly
• Outstanding protection from acid rain and corrosive environments
• Excellent color retention and resistance to chalking and fading
• Available in a wide variety of colors
• Formulated with ceramic IR reflective pigmentation to meet high and low-slope

Interlock Metal Roofing's Cool Roof Coating Technology applied on a metal roof can greatly reduce heating and cooling costs for your residential property.

Additionally, the Alunar® Coating System has been tested in various climates across multiple countries, ensuring that its performance remains consistent no matter where it's applied. This makes it one of the most reliable systems available today and provides assurance that the product will function as expected with years of use.

Cool Roofing

With more and more people looking for ways to make their homes energy efficient, cool roofing has become increasingly popular. A cool roof reflects the sun's rays away from your home instead of absorbing them as traditional roofs do — helping lower cooling costs during the hot summer and reduce your overall carbon footprint. Cool roofs are made up of materials designed specifically to reflect sunlight rather than absorb it, and come in many different styles, colors, textures and shapes. Many cool roof systems also offer insulation benefits, saving you money on energy bills and adding value to your home when it comes time to sell or refinance.

Benefits of Cool Roofing

• Reflects solar energy
• Emits solar heat from buildings
• Reduces building cooling expenses
• Mitigates Urban Heat Island Effect

Cool Roofing — Common Questions

What is a cool roof?

Cool roofs are roofing systems that reflect sunlight and heat away from your home, helping keep it cooler during the hot summer months. This makes for more comfortable living spaces and can save on energy costs by reducing the air conditioning needed in your home. Cool roofs are designed to be durable, resistant to weathering and UV damage, and come in attractive colors and styles.

What are the benefits of a cool roof?

A cool roof reflects the sun’s rays away from your home instead of absorbing them like conventional roofs do. This keeps your house cooler in hot weather, reduces air conditioning costs significantly, and keeps attic temperatures more consistent — which helps extend the life of any insulation installed there. Cool roofs also provide better protection against moisture buildup and often last longer since they aren’t exposed to such high levels of heat stress.

What materials can be used for a cool roof?

Cool roofs are often made from reflective surfaces such as metal or tile. These surfaces reflect sunlight away from the interior of your home, reducing its exposure to heat. Certain coatings can also help reduce solar radiation absorption. Metal is an excellent choice due to its durability, and adding insulation further increases effectiveness in keeping your house comfortable year-round.

How much does cool roofing cost?

Cool roofing costs depend on several factors like size, complexity and the materials used. Generally speaking, expect to pay anywhere from $7,000 to $20,000 or more for the entire process, including materials, labor and installation fees.

How long does a cool roof last?

Lifespan depends on the material. Asphalt shingles typically last 10–15 years and single-ply membranes about 15–20 years, while metal roofs often come with warranties extending beyond 50 years. Regular maintenance — such as cleaning debris off gutters — helps prolong the life of any roof.

Are cool roofs suitable for all climates?

Cool roofs are designed to reflect sunlight and absorb less heat than standard roofing materials, which is most beneficial in warm climates. In colder climates the reflective feature doesn’t help retain warmth, and lighter colors may show dirt more easily in areas with frequent rain or snow. Research your climate and consult a professional before deciding.

An Industry Expert's Perspective on Alunar®

On the Alunar® Coating System, metal-coatings authority Robert Scichili — founding Board Member of the Cool Metal Roofing Coalition and former Business Development Manager for BASF's Industrial Coatings Division — offers this independent assessment:

In my 48 years of experience in the metal roofing industry (21 years with Desoto, 10 years with Morton International, 6 years with BASF and 10 years with 3M), it is most unique to find a company who is constantly striving to provide roofing products that live up to claims that are being made to customers. From the very moment the Interlock Roofing System is applied to a home the customer experiences excellent installation and a very unique surface design all applied to the finest metal available. All these are provided with the promise of great durability and sustainability and a low maintenance roofing system. The use of Alunar® coating systems, which have a superior record of color fastness, chalk resistance and literal fusion like adhesion is the finest coating system anyone can provide.

*Independent expert testimonial on the Alunar® Coating System. Robert Scichili is President of Robert Scichili Associates, Inc. and a founding Board Member of the Cool Metal Roofing Coalition. His 48-year career in metal construction and architectural coatings spans DeSoto, Morton International, BASF (Industrial Coatings Division — Ultra-Cool reflective coatings), and 3M.

Cool Roof Rating Council

The following Alunar® coatings are CRRC rated and available for Title 24 of the California Code of Regulations: California's Energy Efficiency Standards for Residential and Non-residential Buildings.

Black, Deep Charcoal, Musket Grey, Colonial Brown, Tudor Brown, Hunter Green, Tile Red, Royal Blue.