There are a number of things to consider when selecting a new roof system. Of course, cost and durability head the list, but aesthetics and architectural style are important, too. The right roof system for your home or building is one that balances these five considerations. The following roofing products commonly are used for steep-slope structures.

Asphalt shingles possess an overwhelming share of the U.S. steep-slope roofing market and can be reinforced with organic or fiberglass materials. Although asphalt shingles reinforced with organic felts have been around much longer, fiberglass-reinforced products now dominate the market.

Organic shingles

Consist of a cellulose-fiber (i.e., wood) base that is saturated with asphalt and coated with colored mineral granules.

Fiberglass shingles

Consist of a fiberglass mat, top-and-bottom layers of asphalt, and mineral granules.

Asphalt shingles' fire resistances, like most other roofing materials, are categorized by Class A, B or C. Class A signifies the most fire-resistant; Classes B and C denote less fire resistance. Generally, most fiberglass shingles have Class A fire ratings, and most organic shingles have Class C ratings.

A shingle's reinforcement has little effect on its appearance. Organic and fiberglass products are available in laminated (architectural) grades that offer a textured appearance. Zinc or copper-coated ceramic granules also can be applied to organic or fiberglass products to protect against algae attack, a common problem in warm, humid parts of the United States. Both types of shingles also are available in a variety of colors.

Regardless of their reinforcing type and appearance, asphalt shingles' physical characteristics vary significantly. When installing asphalt shingles, NRCA recommends use of shingles that comply with American Society for Testing and Materials (ASTM) standards-ASTM D 225 for organic shingles and ASTM D 3462 for fiberglass shingles. These standards govern the composition and physical properties of asphalt shingles; not all asphalt shingles on the market comply with these standards. If a shingle product complies with one of these standards, it is typically noted in the manufacturer's product literature and on the package wrapper.

Wood shingles and shakes are made from cedar, redwood, southern pine and other woods; their natural look is popular in California, the Northwest and parts of the Midwest. Wood shingles are machinesawn; shakes are handmade and rougher looking. A point to consider: Some local building codes limit the use of wood shingles and shakes because of concerns about fire resistance. Many wood shingles and shakes only have Class C fire ratings or no ratings at all. However, Class A fire ratings are available for certain wood shingle products that incorporate a factory-applied, fire-resistant treatment.

Tile—clay or concrete—is a durable roofing material. Mission and Spanish-style round-topped tiles are used widely in the Southwest and Florida, and flat styles also are available to create French and English looks. Tile is available in a variety of colors and finishes. Tile is heavy. If you are replacing another type of roof system with tile, you will need to verify that the structure can support the load.

Slate is quarried in the United States in Vermont, New York, Pennsylvania and Virginia. It is available in different colors and grades, depending on its origin. Considered virtually indestructible, it is, however, more expensive than other roofing materials. In addition, its application requires special skill and experience. Many old homes, especially in the Northeast, still are protected by this long-lasting roofing material.

Metal, primarily thought of as a low-slope roofing material, has been found to be a roofing alternative for home and building owners with steep-slope roofs. There are two types of metal roofing products: panels and shingles. Numerous metal panel shapes and configurations exist. Metal shingles typically are intended to simulate traditional roof coverings, such as wood shakes, shingles and tile. Apart from metal roofing's longevity, metal shingles are relatively lightweight, have a greater resistance to adverse weather and can be aesthetically pleasing. Some have Class A fire ratings.

Aluminum vs. Steel Roofing

Aluminum and steel are the most commonly used metals in manufacturing roofing products. Both are durable, resistant to the elements and long-lasting, but there are minor differences between the two metal roofing materials:
▸ Aluminum is a lighter material
▸ Aluminum is naturally resistant to corrosion while steel is not
▸ Aluminum roofing costs more than steel roofing
▸ Types of Aluminum Roofing

Aluminum roof panels:

Because of aluminum’s malleable properties, it can be formed and molded relatively easily. Pre-fabricated aluminum panels can be manufactured in virtually any shape or size to fit the roofing structure. These panels install quickly and easily, and they provide superior water-shedding qualities.

Aluminum roof shingles:

In recent years aluminum roof shingles have gained popularity in the residential roofing market. These shingles are lighter and more durable compared to asphalt shingles. Aluminum shingles are manufactured to resemble any type of roofing you can think of, including slate, wood shakes and architectural shingles.

Corrugated aluminum roofing:

Aluminum roof paneling featuring the corrugated (“wavy”) appearance have a long history in the roofing industry. The tin corrugated roofing panels of the past gave way to steel and eventually corrugated aluminum roofing panels. Corrugated paneling can be installed directly over an existing roof due to its lightweight properties, and it’s an ideal choice for steep-sloped roofs, sheds, barns, garages, commercial buildings, and on homes replacing an old tin or steel corrugated roof.

Aluminum Roof Repair

Aluminum roofs are exceptionally durable and long-lasting; however, damage can occur in some instances. Aluminum is more prone to denting compared to steel roofing, although the damage usually will not affect the performance of the roof, just the aesthetics. Hail and walking on the roof can lead to denting.

Leaks and major roof damage typically requires replacing the entire aluminum panel or damaged metal shingles. Patching the damaged areas on an aluminum roof isn’t a long-term fix.

Aluminum roofing products have a usable service life of 50 years or longer. A good quality repair is the key to ensuring your aluminum roof lasts as long as advertised. Always use a qualified roofing contractor with metal roof repair experience to ensure the fix is done right.

Aluminum Roof Installation Over Existing Roofing

Aluminum roofing is among the lightest of all roofing materials, weighing as little as 45 lbs. per square (100 square feet). Because it’s so lightweight, installing an aluminum roof over top of an existing roof is a viable option. This could save you quite a bit of money on a metal roof installation since you wouldn't have the expense of removing the existing layer(s) of roofing.

Aluminum is an architectural roofing product, meaning it’s not utilized for structural purposes. So, when installing over an existing roof wood battens or some other type of solid structural component is attached directly to the roof and the aluminum roofing material attached on top of that.

In cases where the existing roof has significant damage or the sub-structure has damage, the roof may need to be torn off before installing the new aluminum roof.

Aluminum Benefits:

▸ Lightest of all roofing materials
▸ Up to lifetime warranty
▸ Eco-friendly product – up to 95% recycled aluminum
▸ Does not corrode
▸ Wide variety of styles, colors and finishes available
▸ Fire resistant
▸ 50+ year service life
▸ Easy maintenance

Aluminum Drawbacks:

▸ More prone to denting compared to steel
▸ High initial cost (costs more than steel roofing)
▸ Moisture buildup (sweating) below roof surface is possible when poorly installed

Aluminum Roofing Cost

The cost of installing aluminum roofing can vary significantly depending upon where you live, the type of aluminum roofing product you choose, the size of the roof, and the complexity of the roofing structure. In terms of the cost of metal roofing, aluminum falls in between copper (high-cost) and steel (lower-cost).

Synthetic roofing products simulate various traditional roof coverings, such as slate and wood shingles and shakes. However, they do not necessarily have the same properties.

Our roofing experts will take the time to help you explore every product option available
Are your shingles curling, falling off, or discolored? Is your roof sagging, leaking, or cracked?
At Viking Roofing, we use a variety of roofing materials (including metal roofing) for both commercial and residential jobs

In some cases you may find holes, cracking, or missing shingles on roofs with hail or storm damage
Cleaning for many different roof surfaces, including Austin’s most popular asphalt shingled roof
Ventilation is a system of intake and exhaust that creates a flow of air