Category Archives: Materials

Pros & Cons of CertainTeed Shingles – Costs – Unbiased CertainTeed Roofing Reviews

It is generally agreed that CertainTeed’s shingle quality is at or near the top of all fiberglass (fiberglass-reinforced mat that serves as a base for asphalt composition shingle) shingle brands.

Certainteed Grand Manor Shingles Roof in Colonial Slate

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CertainTeed’s large selection of available asphalt shingle products includes the most luxury roofing shingle lines of any brand, plus the mid-grade architectural or dimensional shingles, and the basic 3-tab or strip shingles.

CertainTeed’s Grand Manor and Presidential Shake products are prime examples of Premium roofing shingles that have enhanced depth and differentiated appearance.

CertainTeed’s Landmark PRO roofing shingles are an example of a traditional architectural shingle designed to appear fuller and more dimensional compared to the flattish-looking 3-tab shingle. Dimensional shingles are also thicker and heavier than the basic 3-tab strip shingles.

Did you know? CertainTeed is a heavyweight brand – literally. Its shingles contain more asphalt than most.

CertainTeed shingles, even the 3-tab strip shingles, weigh 200-plus pounds per square. Most weigh 250-480lbs per square. More weight means better durability (and impact resistance).

Other brands’ shingles weigh 160-280lbs per roofing square.

But what about the price? It’s not a secret that all, CertainTeed is the most expensive brand overall. It sometimes denies warranty claims, though that’s a common complaint about all shingle brands.

Are CertainTeed Shingles Your Best Shingle Option?

Anyone researching shingles will find a lot of praise for CertainTeed roofing, along with a few horror stories.

This in-depth review provides unbiased information to help you make a well-educated buying decision.

Information in this guide is based on the perspectives of roofing contractors who install a wide range of products from different asphalt shingle brands, home inspectors that regularly check CertainTeed shingle and other roofs for potential problems, and homeowners who have lived beneath these shingles for years.

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Galvalume vs. Galvanized Steel Roofing – What’s the Difference?

If you are one of the many homeowners looking to install a steel roof on your home, understanding the difference between galvanized steel vs. Galvalume is essential to getting the top performance you expect from your new metal roof.

Right off the bat:

In most residential steel roofing applications including near-coastal areas — beach homes located near the shore, and even homes located in the middle of heavy salt-spray — severe marine environments, Galvalume steel will be a better and more corrosion-resistant option than galvanized steel.

The one exception when Galvalume should not be used:

Galvalume steel should not be used on, in, or around concrete or mortar. Concrete and mortar are highly alkaline environments.

Did you know? Bare Galvalume steel and painted Galvalume sheets will suffer rapid corrosion when in contact with mortar and concrete.

Bare Galvanized steel and painted Galvanized perform better in this type of environment.

Now, because aluminum, one of the two metals in Galvalume coating, provides a barrier protection for steel, instead of galvanic or self-healing protection in galvanized steel, scratches and cut edges in Galvalume are less protected.

Galvalume steel is best for use in prefabricated metal wall panels and standing seam metal roof applications with concealed fasteners.

We would not recommend using Galvalume panels with exposed-fastener steel roofing systems such as corrugated or ribbed steel roofs.

Normally, Galvalume is offered in both bare and pre-coated (pre-painted) versions. Most residential-grade Galvalume metal roofing products – like galvanized steel – are coated with Kynar 500 or Hylar 5000 paint finishes.

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Galvalume has an excellent performance lifespan in bare exposures (unpainted panels) as well.  Both galvanized steel and Galvalume weigh 100 to 150 pounds per 100 square feet and contain about 35% recycled steel post-consumer content.

The cost of Galvalume and Galvalume Plus are about the same as that of galvanized steel.

A product called Galvalume Plus features an extra coating of acrylic. One advantage of Galvalume Plus is that it can be roll-formed dry, without vanishing oil. Thus, Galvalume Plus is very easy to form and install safely in the field, using portable roll-formers.

What is galvanized steel:

Galvanized steel was invented and developed for commercial use in the first half of the 19th Century, so it has nearly 200 years of proven track record. Carbon sheet steel is dipped in molten zinc. It’s more than a coating, however. A chemical bond occurs and produces the telltale “spangles,” the crystalline surface pattern found on galvanized steel.

Tip: Look for G-90 galvanized steel for residential applications not G-60

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Corrugated Metal Vs. Standing Seam – Myth Busters

Who Invented the Original, Corrugated Iron / Steel Roofing Style?

Henry Robinson Palmer learned his civil engineering under Scotsman Thomas Telford, the greatest builder of roads, canals and bridges in the British Empire in the early 19th century.

Standing Seam Vertical Panels

In 1821 Palmer applied for a patent for a single elevated rail supported by pillars spaced ten feet apart that sported wheeled carriages hanging down from either side that would roll along the rail when pulled by a horse. Henry Robinson Palmer had invented the world’s first monorail.

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If you research Palmer’s life today, every source details the creation of the monorail. For most thumbnail sketches of Palmer’s life that is the end of the story, but Palmer himself did not concern himself much with the monorail after building the first one in 1825, about one mile long, in Cheshunt, a town twelve miles from London.

Two years later the 32-year old Palmer landed a job as resident engineer for the London Dock Company. It was his responsibility to construct the walls along the Thames River to keep the world’s busiest port humming.

The aging wooden docks were in constant need of upgrade. To keep up Palmer patented a lightweight metal building panel that was self-supporting due to a series of waves or folds molded into the sheets.

Palmer’s manufacturing process consisted of pushing his sheet metal across fluted rollers to create the ridges that gave the metal strength. He called this “corrugation”, from the Latin word for “wrinkled.” It remains a common method for manufacturing corrugated metal today.

Palmer erected the world’s first corrugated building on the Thames River docks in 1829 and he continued to patent improvements in the construction of arches and roofs.

It is ironic that today Henry Robinson Palmer is remembered for the invention of the monorail, which is rarely encountered outside of amusement parks, airports and a classic Simpsons episode. He is scarcely recognized for the development of corrugation, which became so ubiquitous in the 19th century for cheap shelter that most people – and historians – assumed it had been with us since antiquity.

Historical Significance of Corrugation

corrugated metal roof

Without corrugated metal there would have been no rapid development of the United States frontier, a less frantic California gold rush, much slower settling of farm land on the Great Plains and much harsher living conditions on the battlefield.

The strength to materials imparted by corrugation extended beyond the metal sop to other industries; it was critical to the development of the cardboard, for instance.

Metal Roof Construction

metal-roof-on-a-log-home

By stiffening the metal sheets, corrugation permits a greater span across a lighter framework, ideal for the balloon construction techniques that became widespread in the 19th century.

But metal for roofing has been used for centuries, although it was rare in early America. Thomas Jefferson was a metal roof fanboy and installed tin-plate iron on the roof of his beloved Monticello in rural Virginia.

A metal roof could be fabricated with shingles or a “standing seam,” a technique which involved folding the edges upwards and laying the sheets over one another. Fasteners would hide under the upraised ridge where the sheets interlocked, producing clean, aesthetically pleasing lines.

monticello roof

Metal Shingles Vs. Standing Seam Vs. Corrugated Metal Sheets

Steel Shingles Roof

While metal shingles are also available today and can be produced to mimic any material, standing seam and corrugation remain the two most common types of metal roofs. Let’s have a look at them side by side as you consider your upcoming remodeling project.

elegant standing seam metal roof By Gast Architects

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Materials

The earliest metals used in roofing were lead and copper. Both could last for centuries, which is fortunate since those metals are prohibitively expensive. Today, lead is most often found in roofing as a coating for steel and copper is mostly reserved for flashing or architectural details.

Tin and its close cousin terne, a lead-tin mixture that appears lackluster (hence its French name which translates as dull), were the most common metal roofing materials of the 19th century and are important in authentic historical renovations.

Zinc had a brief run of popularity in the early 1800s as a roofing material, but it became most critical to metal roofing in 1837 when French metallurgists coated iron and steel with zinc to invent galvanization and (mostly) rust-proof metal.

In the 21st century, galvanized steel is the go-to metal roofing material. It is the least expensive roofing material and can be coated in many ways for appearance. Corrugated metal can be fabricated from a G-60 steel that is thinner grade and less expensive.

Standard standing seam roofs can be made from G-90 grade steel, a higher-end Galvalume steel, or aluminum.

Galvanized steel is fabricated in a range from 9 gauge (0.1532 inches) to 32 gauge (0.0134 inches). Standing seam metal panels typically begin as rolls of 24-gauge steel (G-24) or the thicker 22-gauge (G-22) before ferrous metal coatings are hot-dipped.

Corrugated steel paneling can be formed from G-26 or G-29 steel, which makes its cost less expensive; standing seam roofs will never use steel thinner than 26-gauge.

standing-seam-panels

Even galvanized steel can corrode. Galvalume is a trademarked product from U.S. Steel that takes carbon steel and coats it with an aluminum-zinc alloy that performs like galvanized steel on steroids.

But even Galvalume will eventually lose the corrosion battle against the salt spray of ocean near the coastal regions. In such cases, aluminum is the metal of choice. Although more expensive than steel, initially, aluminum’s longer life expectancy helps level the eventual bottom lines.

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