With standing seam metal roofing, the sky is the limit for opportunities to be green! Houston Metal roofing has always been famous for being durable. But metal roofing now is not only durable but also beautiful and energy efficient. Both low and steep-slope systems can remain operational for 30 years or more. But today’s systems also meet increased demands for energy efficiency. Through the proper selection of surface finishes, metal roofs can have higher levels of solar reflectance, resulting in lower surface temperatures resulting in a longer lifetime to the entire roofing system and energy efficiency.
Here are some of the reasons why metal roofing is “The Ultimate Roofing Material”.
- Lasts a Lifetime
- Adds Value to Your Home
- Withstands Severe Weather
- Snow Slides off Roof
- Conserves Energy
- Requires Virtually No Maintenance
- Does Not Support the Growth of Moss, Mildew or Fungus
- Broad Palette of Attractive Colors
- Can Be Installed Over Existing Asphalt Roof
To help our Houston metal roofing clients sort through the numerous criteria when considering a cool metal roof, here are a few important tips:
- Make sure the roofing product is labeled as “cool.” The EPA’s Energy Star program includes a roofing category that defines the requirements for energy-efficient metal roofs all applications. A cool metal roof that carries this label can help property owners achieve tax incentives. For commercial construction, tax deductions are provided for energy efficient improvements that result in a 50% reduction in annual energy costs compared to a standard building(s). Likewise, the Cool Roof Rating Council has a certification program that measures and lists reflectance and thermal emittance values of various types of roofing products.
- Use durable and corrosion-resistant products.Metal roofing substrates include metallic-coated steel, aluminum, copper, zinc, and stainless steel. Metal roofs typically have longer useful lives due to the longevity of the substrates from which they are made. However, the corrosion resistance of a metal roof can vary depending on which substrate is specified. With steel roofing, galvanized and Galvalume sheets are common. Galvalume is a steel product coated with an aluminum and zinc alloy that has two to four times the corrosion resistance of galvanized steel. Other metals such as copper, aluminum, and zinc have much better corrosion performance than coated steel but are not as strong as steel. Most metal roofing suppliers offer “cool” metal roofs in a range of colors, even dark hues. Infrared-reflective pigment technology allows darker colors, such as browns, blues, and greens, to behave much like lighter colors with respect to solar reflectance.
- If using painted metal, don’t be afraid to specify a dark color.Property owners and designers should no longer assume that dark colors or hues are hot. Infrared-reflective pigments introduced to the industrial finishes industry several years ago allow darker colors to behave much like lighter colors with respect to solar reflectance. That means architects can specify darker colors, like earth tones, and still meet the solar reflectance and infrared emittance requirements set by Energy Star and CRRC.
- Don’t underestimate the effect of above-sheathing ventilation.Certain metal roofing products with raised profiles can take advantage of recently discovered benefits of the airflow between the roof deck and the bottom of the metal roof panel. This natural air ventilation helps reduce the heat flow through the deck into space below. Combining the above-sheathing ventilation with a cool color or reflective granular-coated surface can result in a 45% reduction in heat flow through the roof deck.
- Choose the correct metal roof for the climate and application.Metal roofs are available in a wide range of solar reflectance and thermal emittance properties. Specifying the ideal combination of these properties based on climate can increase the energy efficiency of any building. For example, in northern settings where heating is an important consideration, a metal roof with high solar reflectance and low thermal emittance may be desired to achieve the maximum cooling and heating energy efficiency. An unpainted cool metal roof product would be most appropriate for this type of application. For locations where cooling is of importance, a cool metal roof with high solar reflectance and high thermal emittance would be preferred to help lower air-conditioning costs.