Why should I consider metal roofing?
Metal roofing is one of the most practical roofing materials on the market today. It offers a life long alternative to problem plagued roofing materials such as asphalt, clay, wood and slate.
Metal roofing is available in a wide variety of styles and colors. Whether you prefer tiles, shingles, shakes or standing seam, there is a product to satisfy your taste.
Isn&#;t metal roofing expensive?
Metal roofing should be considered an investment, not an expense. Over the life of your home, metal roofing is probably the most economical roofing material because it can be the last roof you need to install. Traditional roofing materials have a very limited life expectancy and additional costs will need to be incurred over and over.
Isn&#;t metal roofing noisy?
Most metal roofing is installed over the top of an existing roof or solid deck. Attic space and insulation provides a further sound barrier. Research has proven that metal roofing is not any nosier than traditional roofing products.
Do I need to remove the existing roof because of the additional weight?
One of the biggest advantages to metal roofing is that in most installations, the existing roof is not removed. Metal roofing is a lightweight material (approx. 1/3 the weight of shingles) and depending on your local building codes, the preferred option is to leave the old roof intact.
In addition, millions of tons of old shingles are disposed of in landfills all across the country. Metal roofing can reduce the environmental impact.
How long does a metal roof really last?
A metal roof is a permanent roof system. Warranties normally cover paint finishes and installation from 30-50 years. The actual metal roof panels are projected to last far beyond the warranty. With minimal maintenance, it will last as long as your house. There are metal roofs that have been protecting structures for more than 100 years.
Are metal roofs hot?
Metal roofs are naturally cooler because they reflect over 70% of the sun&#;s energy. This minimizes heat retnetion and as a result, less heat is transferred into the building&#;s structure. In addition, most metal roofs allow for airflow under the actual roof panel which further reduces the heat absorption of the shingles or decking beneath the panel.
Is metal roofing more resistant to severe weather?
Metal roofing withstands severe weather conditions better than most roofing materials. Even in the most extreme conditions, metal roofs will withstand high winds, torrential rains and even large hail. While other roofing materials will tear, break or blow off, metal roofing remains intact. The most severe result in a hail storm would likely be some cosmetic dimpling but the roof will maintain its integrity.
Does metal roofing attract lightning?
Metal roofing is no more susceptible to lightning than any other roofing material. Lightning most frequently strikes the highest point, not necessarily metal. However, if your roof would be struck by lightning, a metal roof can help to prevent your home from catching on fire because it can dissipate the electrical charge. More importantly, it is non-combustible.
Edge Corrosion (field cutting induced) &#; Corrosion at the exposed, thin, unpainted end of a metal panel. Often created due to field cutting of panels by heat generating devise such as a grinding disk or sawzal (compared to a manufacturers shear or shearing action used on a jobsite to cut material) which leads to an inconsistent, exposed edge which can trap water and spread corrosion more rapidly.
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Edge Wave (slitter or roll former induced) &#; The visible, unintentional waviness, or buckling at the edge of a metal strip due to the forces imparted on the panel during the production or forming process. Often due to improper production or quality control processes.
Electrolysis &#; Electrolytic Corrosion created by two or more dissimilar metals in contact with each other and an electrolyte containing small amounts of acid. A common example is moisture in a coastal environment. This leads to galvanic corrosion in which one metal will corrode preferentially to the other.
Embossing &#; Embossing is the process of creating a raised texture to the surface of the metal. Undertaken in a continuous process for metal applications such as metal walls.
Emissivity &#; Emissivity is the amount of heat a surface can dissipate away from itself. This is expressed as a percentage between 0-100%. Used in the calculation of the Solar Reflectance Index for metal roofs.
Exposed Fastener or Lap Seam Panels &#; Exposed Fastener or Lap Seam Panels are metal roof and wall panels which are lapped with one over the other, with the fastener then attached from the outside and driven directly through the metal.
Fading &#; Fading occurs to metal roof and metal wall products when UV rays and substances in the environment attack the pigments in the paint and cause their color to change. Color change is typically assessed based on its variance to the base state when new, represented by Delta E (dE or ΔE).
Film Thickness &#; Film thickness or dry film thickness (DFT) refers to the thickness of paint film on the strip surface, once the paint has cured. Typical dry film thicknesses for painted steel for metal roof and metal products range from 0.&#; (0.5 mil) to 0.&#; (1.5 mil).
Flexographic Roll Printing &#; Flexographic roll printing is the process Steelscape employs to impart its distinctive colors and designs, such as rustic and aged metallics onto metal for metal roof and wall products.
Galvalume® &#; See ZINCALUME®
Galvanic (bi-metal) Corrosion &#; The preferential corrosion of one metal over another, created when two dissimilar metals are in contact with one another in a conducive environment (presence of moisture with acid). Heightened by how dissimilar the metals are on the galvanic scale and how conducive the environment is (e.g. more prominent on the coast than in the desert).
Galvanizing &#; Galvanizing is the process of coating a thin layer of zinc to steel to improve corrosion resistance. Referred to by Steelscape as TruZinc. For most metal roof and metal wall products that use galvanizing this is applied before the paint layer.
Gauge &#; Gauge refers to the thickness of metal. A smaller gauge correlates to a thicker metal. For example, 22ga is thicker metal than 29ga. 22ga-29ga are also the most common gauges for metal roof and metal wall building applications. Sometimes spelled as gage.
Gloss and Sheen &#; Gloss and sheen are two terms used to describe how well a surface reflects visible light. Gloss is measured at a 60° angle from the surface, while sheen is measured at 85°.
Graffiti Resistance &#; Graffiti resistance, for Steelscape applications, refers to a painted metal wall surface in which aerosol or marker-based graffiti can be removed from the surface.
Inert Catchment &#; When acidic rainwater, created by certain environmental conditions, creates corrosion in areas downstream of the water catchment surface such as gutters and downpipes. Avoided by ensuring the correct material is selected relative to its environment.
Pressure Mottling &#; Uneven or irregular gloss visible on painted steel ( often in a splotchy or speckled pattern) due to variation in the pressure applied to the painted surface of the metal when it is stored in coil format. Typically a temporary condition that will dissipate with time.
LEED &#; Leadership in Energy and Environmental Design (LEED), is a green building rating system developed based on a pre-developed framework for healthy, efficient and environmentally sustainable structures.
Light Reflectance Value (LRV) &#; Light Reflectance Value measures the amount of visible or usable light that reflects from a surface. LRV is expressed as a percentage from 0 to 100; the higher the number the more visible light that is reflected. Used for both metal roofs and metal walls.
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