Metal Roofing & Siding


Low Slope Commercial Metal Roofing

Low Slope Metal Roofs Provide Years of Low Cost, Low Maintenance Performance.

Low slope metal roofs have been a preferred roof covering for commercial, institutional and industrial buildings for years because of their ability to protect against the elements, to allow water to drain away from the roof surface, and to keep building contents and occupants dry and comfortable.

Recently, building owners and architects have come to recognize and appreciate still other attributes of low slope metal roofs – their long service life, low life cycle cost, sustainability, recyclability, low maintenance requirements, light weight and resistance to wind.

Low slope structural roofing, generally used on roof pitches ranging from ¼:12 to 3:12, consists of interlocking panels, commonly called standing seam roofing, that run vertically along the roof surface. These panels generally come with a painted mill finish or a clear acrylic finish. Some metal roofing used on low slope applications requires machine seaming during installation to ensure a watertight seal. A seaming apparatus is simply rolled along the panels to crimp the panel seams together.

A standing seam design assures adequate draining from rain and snow, effectively eliminating ponding, leaks and related problems typically associated with built-up roofs. In retrofit projects, a sub-framing system is attached to the existing flat roof surface to provide a minimum ¼:12 roof pitch.

Moreover, low slope metal roofs are not prone to the degradation experienced by organic materials, enabling these roofs to better resist the elements. This, in turn, results in a longer life span and a very low annual operating cost.

Study Substantiates Low Life Cycle Cost

As a result of the durability and reliability of these systems, low slope metal roof manufacturers offer 20- to 40-year warranties on their products. Their long life and low maintenance requirements also put metal roofs on a very attractive life cycle cost track.

This was confirmed in a 2004 study of low slope roofing conducted by Ducker International. Respondents to the study said they expected the life cycle cost of a metal roof, including outlays for maintenance, to be about 30 cents a square foot per year, far less than their expectations for built-up and single-ply roofs, at 37 cents and 57 cents, respectively.

Metal roofs also have a significantly longer expected service life than either built-up roofing or single-ply roofs. Study participants said they expect metal roofs to last 40 years – 17 years longer than built-up and 20 years longer than single-ply systems.

Not only can low slope metal roofing contribute to the bottom line, it can also contribute to LEED credits, which are awarded to buildings that use high recycled content and other “green” construction materials. A typical low slope metal roof has

at least 25% recycled content, and at the end of its long useful life is 100% recyclable.

In addition, “cool metal roofing” can significantly reduce a building’s long term energy use. With heat deflecting metal coatings, energy costs can be reduced up to 40% or more, according to a study conducted by Oak Ridge National Laboratory.

Metal Roofs Place Fewer Demands on Structure

Typically, low slope metal roof systems vary in weight from 40 to 135 pounds per 100 square feet, making them among the lightest roofing products and the easiest to install. A lightweight roofing system also places fewer demands on a building’s structural support system, an important consideration in earthquake-prone areas.

Unlike non-metal systems which require an underlying substrate or deck, low slope metal roofs can be applied directly over bar joists or purlins. And, because of their interlocking or active fastening systems, metal roof panels are designed to meet the requirements of ASTM E1592, UL 580, UL1897 and other severe wind and uplift tests.

Metal roofing products come in a variety of materials as well as many colors, textures and profiles. To ensure longer life, almost all low slope roof materials are protected from the elements by high performance, highly durable metallic coatings.

While the idea of protecting a building with metal originated centuries ago, the concept is still valid today. Whether the goal is many years of low-cost, low maintenance, problem-free performance, or an environmentally responsible approach to roofing, low slope metal roofs make sense.

Call NSS Exteriors for a free on site quote to repair, replace or install a new commercial metal roof. For details on specific options, pricing and installation, please contact us online or call 708-385-5815.

Steep Slope Commercial Metal Roofing

Steep Slope Metal Roofs Offer Long-Term Performance as Well as Long-Term Beauty.

When building owners and architects require an attractive and affordable steep slope roof covering for a commercial project, chances are that more and more of them will choose a metal roof.

Steep slope metal roofs, often defined as roofs with pitches of 3:12 or greater, have long been favored by environmentally sensitive building owners and architects who appreciate the roof’s aesthetic appeal, long service life, low maintenance requirements, light weight and resistance to wind.

Steep slope metal roofs, for example, can enhance the appearance of virtually any building thanks, in large measure, to their receptivity to various coatings and their ability to be formed into a wide variety of shapes.

Because steep slope metal roofs accelerate the rate of water run-off, they also reduce the likelihood of a build-up of debris, mold and mildew. At the same time, they are less likely to experience staining from acid rain or UV degradation than non-metal steep slope systems. The durability and reliability of steep slope systems have led metal roof manufacturers to typically warranty their products for 20 to 40 years.

Metal Roofs Contain at Least 25% Recycled Content

The environmental aspects of metal roofs have also prompted building owners and architects to take notice. For example, the use of steep slope metal roofs can contribute to LEED credits, which are awarded to buildings that use high recycled content and other “green” construction materials. A typical steep slope metal roof contains at least 25% recycled content, and at the end of its long, useful life is 100% recyclable.

In addition, “cool metal roofing” can significantly reduce a building’s long-term energy use. Through the application of heat deflecting metal coatings, energy costs can be reduced up to 40% of more, according to a study conducted by Oak Ridge National Laboratory.

Steep slope metal roof systems typically weigh from 40 to 135 pounds per 100 square feet, making them among the lightest roofing products. A lightweight system places fewer demands on a building’s structural support system, an important consideration, especially when choosing a roof material for buildings located in earthquake-prone areas.

Metal roof systems, with their interlocking or active fastening systems, are also excellent options for steep roof applications in areas subject to high winds. Metal systems are designed to meet the requirements of ASTM E1592, UL 580, UL 1897 and other severe wind and uplift tests.

Steep slope metal roofing products come in a variety of materials, including steel, aluminum, copper and zinc, as well as many colors, textures and profiles. To ensure longer life, almost all metal roof products are protected from the elements by high-performance, highly durable coatings. Natural metal roof panels such as those made from zinc and copper are often left unfinished because of the protective patina that naturally occurs.

Two Categories of Steep Slope Metal Roofs

Steep slope roofs fall into two general categories – structural and architectural. Steep slope structural roofs are generally applied over open framing, but they can be installed just as well over a solid deck.

Structural systems come in various styles, including vertical standing seam systems that are fastened to underlying purlins with hidden clips or fastening flanges. Also available are corrugated or tile facsimile metal roofs that are attached with exposed fasteners directly through the metal roofing panels. These products overlap or interlock on their side and end laps for a watertight fit.

Architectural steep slope roofs, unlike structural systems, always require a solid substrate beneath them – typically plywood, oriented strand board, concrete or a metal roof deck. Architectural roof panels also come in a variety of styles, including standing seam, corrugated and tile profiles, as well as a variety of horizontal panels. Most architectural metal roofs are coated with a paint finish for added aesthetics.

Whether building owners or architects choose a structural or architectural steep slope metal system, they can be assured that they will obtain an environmentally sustainable product that will deliver exceptional performance and curb appeal along with an attractive return on investment.

Call NSS Exteriors for a free on site quote to repair, replace or install a new commercial metal roof. For details on specific options, pricing and installation, please contact us online or call 708-385-5815.

Some examples of our work:
Copper Roof
Metal Roof Canopy
Metal Wall Panel
Metal Siding
Metal Siding

Types of Metal Roofing and Siding:

Categories:
  • B-6 Panel
  • Batten Seam
  • Bermuda Roof Panel
  • Board & Batt Panel
  • Cee-Lock Panel
  • Classic Shingle
  • Colonial Siding
  • Curved Tee-Panel
  • Curved Zee-Lock Panel
  • Deep Deck Panel
  • Double-Rib Panel
  • Fish Scale Shingle
  • Flat Seam Panel
  • Flush Seam Panel
  • Fluted Fascia Panel
  • FW-12 Panel
  • High Seam Tee-Panel
  • Insulated Metal Panels
  • "M" Panel
  • "R" Panel
  • Rustic Shake
  • S-Deck
  • Spanish Tile
  • S-Tile Panel
  • Tee Panel
  • Thin-Line panel
  • Vee-Panel
  • Victorian Shingle
  • Zee-Lock Standing Seam

Insulated Metal Panels

Insulated metal panels (IMPs) are premier building products on the leading edge of innovation. The panels are formed by a continuously poured-in-place, manufacturing process which binds interior and exterior steel facings to a polyisocyanurate, insulating foam core. Having the traits listed below, the applications are limitless. 
  • Exceptional insulating properties
  • Superior spanning capability
  • Accelerated installation times
  • Cost-effective pricing
  • Recycled content
  • Rigid feel
  • Streamlined architectural appearance
IMP wall panels can be installed both vertically and horizontally and are available in a myriad of different profiles and finishes. Within our vision, there is not a building project in existence that would not benefit in some fashion from the utilization of IMPs.
Panels are available in 2, 2.5, 3, 4, 5 and 6 inch thicknesses. Available steel gauges are 26, 24 and 22-gauge. A standing seam roof profile is available as well as a mineral wool cored profile. See the attached brochure for additional specifications. For more details please contact an NSS Exteriors metal roofing specialist at 708-385-5815.  

NSS Exteriors provides free on site quotes to repair, replace or install a new commercial metal roof. For details on specific options, pricing and installation, please contact us online or call 708-385-5815.

Metal Roofing FAQ

General Metal Roofing Questions:

What is the cost comparison between a metal roof and an asphalt shingle roof?
The cost of a metal roof cannot be readily compared to asphalt for various reasons. The condition and type of roof would have significant bearing on the overall cost, as would the "profile" or style of metal roofing you would choose. When considering metal vs. asphalt, you are basically choosing between an investment (metal) over an expense (asphalt).

Will a metal roof increase the likelihood of a lightning strike?
The answer to this question is "absolutely not". Although metal conducts electricity, lightning is not drawn to it. It's unusual for lightning to hit buildings. Lightning typically strikes the highest object in an area. That's why it often strikes trees, power poles, antennas, and towers.

But if your home were hit by lightning, your metal roof would disperse the energy safely through the structure. Since metal roofing isn't combustible or flammable, it's a low risk and desirable roofing option where severe weather is concerned -- especially for lightning.

Are metal roofs loud?
This may surprise you -- metal roofing is often quieter than an asphalt shingle roof. When installed with solid sheathing, a metal roof on your home will actually silence noise from rain, hail and bad weather better than other roofing materials.

Is a metal roof hot?
Metal reflects 70% of the sun's energy. This minimizes heat retention and as a result less heat is transferred into the building's structure. Further, 1985 research by the Florida Solar Energy Center showed that metal experienced a 34% less heat gain than asphalt shingles. Results indicate that metal roofing offers a similar effect on R-11 insulation on top of the roof during sunny day conditions.

Will my metal roof rust?
Today's metal roofing systems are built to last. Steel metal roofing has a "metallic coating" made of either zinc or a combination of zinc and aluminum. This metallic coating prevents rust from forming and is bonded to the steel at the factory. Paint is then applied over the metallic coating to provide the long-lasting color homeowners desire.

Will hail dent my metal roof?
A metal roof can withstand decades of abuse from extreme weather like hail, high winds, and heavy snow. In unusual cases, very large-sized hail has been known to dent metal roofs during extremely heavy storms. But, a typical hail storm will not dent your metal roof. Today's systems also have a 120-mph wind rating (equal to an F2 tornado), meaning your metal roof is also safe from wind gusts that can accompany hail storms.

Can I walk on my metal roof to clean gutters?
Many people think you can't walk on a metal roof -- but the truth is that you can safely walk any metal roof without damaging it. Before you walk your roof, however, we recommend you talk to your installer first. They will have the details on how to walk the roof.

Do I need to remove my existing roofing material?
One of the benefits of metal roofing is that it is lightweight, which allows it to be installed over existing roofing material. However, the answer to this question ultimately depends on your local building code requirements and the condition of your current roof's substructure.
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