Frequently Asked Questions

Listed below are some of our more frequently asked questions. If your question is not answered on this page, fill out our contact us form or give us a call at 512-253-4957.

  • What makes a Green Knight Metal Roof unique?

    Green Knight Metal Roofing specializes in Metal Roofing installation.  We do not install “temporary” roofing materials such as Asphalt Shingles.  We believe in enhancing the value of your home by only offering the highest quality metal roofing materials available.  .


  • How long have aluminum roofs been on the market?

    The oldest aluminum roof in the world was installed in 1880 on the Chief Secretary’s office building in Sydney, Australia, and is still in sound condition.


  • Will the look of a metal roof fit with the architectural style of my home?

    Yes, Green Knight Metal Roofs are designed to replicate the rich beauty of roofing materials widely used today.

  • Does it look shiny and metallic?

    The deep, natural texture and earth-tone colors of Green Knight Metal Roofs give it the authentic look of today’s roofing materials. It is easily mistaken for the real thing! Although there may be some gloss right after the roof is installed, that gloss will soon dull to a flat, natural look as airborne dust settles on it, just like the finish on your car. That initial gloss is unavoidable with a high quality finish Kynar.

  • What finish is on a Green Knight Metal Roof?

    Green Knight Metal roofs made of aluminum will withstand the harshest weather for years to come because it features the baked-on Kynar finish. This special multi-step finish is widely recognized as the industries finest. It is often used on industrial buildings and skyscrapers because of its superior protection and color retention. The layers of the Kynar finish are applied to our quality aluminum alloy in a multi-step process.

  • What colors are available?

    • Pearl Black
    • Buckskin
    • Caramel
    • Deep Charcoal
    • Forest Green
    • Mustang Brown
    • Oceanside Blue
    • Regal White
    • Shake Gray
    • Terra Red
    • Brite Blue
    • Brite Red

  • How will this roof affect my energy bill?

    Homeowners who have re-roofed with a Green Knight Metal Roof have found their air conditioning costs to decrease by up to thirty percent and their heating bill to decrease by 10% after the roof was installed with proper ventilation. This is due to the roof’s low emissivity value. Rather than pass the heat of the sun into your attic, the aluminum panels reflect up to 94.5 % of the sun’s rays. This reflectivity is an inherent property of the composition of the aluminum roof, regardless of the color you choose. According to testing conducted by the Florida Solar Energy Center, Aluminum allows up to 34 % less attic heat gain than traditional roofing materials. This means a lighter load for your air conditioner and reduced energy bills for you.


  • Exactly how much can I save by installing a Green Knight Metal Roof?

    The smart homeowner buys roofing on an annual cost basis. First, the total installed price is determined. Then other factors are determined, such as how long the new roof will last, how much it will save in energy costs, how well it provides wind, water and fire protection, how much maintenance it will require, and how well it is likely to survive a severe storm. Since it is a premium product, the initial cost for a Green Knight Metal Roof is in the high range of roofing materials, but it will last much longer, as well. A Green Knight Metal Roof offers a worry-free long life, which means long-term economy and beauty. In addition, it adds to the value of the home, unlike traditional materials. With the rising cost of energy, homeowners list their savings as a huge advantage to a Green Knight Metal Roof.


  • How long will a Green Knight Metal Roof Last?

    The Kynar finish is warranted for 40 years. The aluminum shingles will probably outlast the house. The oldest aluminum roof in the world was installed in 1880 on the Chief Secretary’s Office Building in Sydney, Australia and is still in sound condition. The cap on our Washington monument, also aluminum was installed in 1884 and has likewise experienced no problems.

  • Can a Green Knight Metal Roof be installed over my existing roof?

    The product is often installed over existing roofs without a tear-off. The National building code does require a tear off if two layers of roofing material are on a roof. When going over your existing shingles a watertight synthetic underlayment is first applied.


  • How can I get a Green Knight Metal Roof installed on my home?

    Call 512-253-4957, or fill out the contact us form, and we will set an appointment to help you with your new roof.


  • How do Green Knight Metal Roofs stay watertight?

    The four-way interlock, along with careful flashing during the installation process, makes leakage impossible. The locked-down edges of the shingles cannot be lifted, unlike the unsealed edges of other roofing products. Many of our products have been tested in Dade County, Florida with 110 mile per hour wind-driven rain without a single leak.

  • How do Green Knight Metal Roofs stand up to fire?

    Our metal roofs cannot be ignited by sparks from chimneys and nearby fires the way cedar shakes and asphalt shinglescan. Since most major residential fires spread from sparks landing on the roof, our roofs provide exactly the kind of protection that canstop a neighborhood fire in its tracks.


  • How will a Green Knight Metal Roof stand up to high winds?

    Green Knight Metal Roofs are designed to withstand the strongest winds. To insure this, they have been laboratory tested and have gone through several Hurricanes in Florida and Louisiana. In addition to locking on all four sides between panels, the shingles are anchored to the roof deck with ring-shank nails that are virtually impossible to pull out.


  • How does a Green Knight Metal roof do with hail?

    Our Aluminum roofs have passed UL 2218 Impact Testing with a Class IV rating, the highest available. This means our roof can qualify homeowners for hail-resistant roofing discounts on their homeowner insurance in some states (ask your insurance agent for full details). In addition, the Kynar finish is warranted not to chip due to hail impact. Finally, because they are constructed of high-quality aluminum, they don’t lose their impact-resistance with age like other roofing materials do. So while other roofing products provide less and less protection for your home each year, homes protected by a Green Knight Metal Roof maintain their lasting dependability for years and years to come.


  • Are Green Knight Metal Roofs noisy?

    No, most homeowners notice little difference. The texture of the panel keeps it from reverberating like flat metal roofing does. Normal attic insulation also absorbs most of the sound. We’ve never had a complaint about rain noise with our roofs. In fact, the only comments we hear are from people who wish they could hear it more. If you hear rain on your roof now you will hear it with a Green Knight Metal Roof but it will be a slightly higher tone.

  • Can you walk on a Green Knight Metal Roof?

    Yes, you can walk on a Green Knight Metal Roof. The texturing and pattern provide the shingles with the strength needed to sustain normal roof traffic. You must step on the upper half of the panels where they taper to rest on the roof deck. If, for some reason, the roof is expected to have a lot of traffic, an optional styrene backer made to rest behind the shingles can be installed. In addition to providing greater rigidity, this backer gives the panel even greater insulating ability.

  • What is the cost of a Green Knight Metal Roof?

    The cost of your roof is determined by a variety of elements such as size, pitch, color, style, accessories, ventilation needs, paint finish, type of metal, thickness of metal, type of underlayment, installation method, layers of existing roof material, type of existing roof material being roofed over, poly styrene walkways needed, number of penetrations from chimneys, pipes and skylights, overall height of the roof, access to the roof, and time of the year. It is impossible to even “get you close” without thoroughly examining your roof and allowing you to make a few dozen decisions. For these reasons we ask that all decision makers be present when we visit with you. Please complete the feedback form on our Contact page and we’ll be glad to visit your home and give you an exact quote.


  • What are HI-R coatings?

    Hi-R coatings were developed for military vehicles so they could avoid infrared detection by the enemy during Desert Storm. This is accomplished by reflecting away the near infrared (IR) spectrum. Nearly 45% of the heat is generated in the near IR spectrum. By reflecting this portion of the spectrum with special pigments in the Kynar paint, Hi-R paint is able to reduce the amount of heat gain by your home while still providing the same Kynar performance. The end result is a roof that is approximately 50 degrees cooler resulting in significant savings on your air conditioning bills.

  • Why do asphalt roofs fail?

    There is not a quick and easy answer to this problem. For this reason, we have dedicated a whole page to this discussion. Please visit this page to find the answer.