Le Spécialiste du bardeau de cèdre

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FAQ (en)


FAQ - Siding and Roofing Shingles

At SBC, we care for customers’ satisfaction. In a way to help and inform you on our products, we have prepared our frequently asked questions. If the information you wish to know is not included, do not hesitate to communicate with us and we will be pleased to answer you.

What are the nominal sizes of Eastern white cedar shingles?

Thickness: 3/8’’ (9.5 mm) at the butt; Length: 16’’ (40.6 cm); Width: from 3’’ to 12’’ (7.6 to 30.5 cm). SBC shingles of grade Extra “A” and Clear “B” have a minimum width of 3-7/16’’ (8.7 cm).

Where does the cedar used for the fabrication of SBC shingles come from?

Mainly from Quebec, but also from New Brunswick, Ontario and Maine (USA).

How long does a cedar shingle siding last?

When it is well-installed according to our installation recommendations, cedar shingle siding can last over 50 years.

How are SBC shingles different from those of competitors?

At SBC, quality control and customer satisfaction is a priority. We are proud to affix our name to every shingle going out of our mill. We have invested in a state-of-the-art technology to offer wider shingles, from which the precise cut will allow to save on installation time. We also have a high grading system: our shingles are graded on both faces with a consideration to all wood defects, including sapwood. Moreover, thanks to our unique dipping coating process, we offer the best warranty program, that is 10 years on 1 coat and 25 years on 2 coats (solid stain).

Does Eastern white cedar last as long as Western red cedar?

The service life of properly installed and maintained shingles, both red and white should be roughly the same. Both have tannins that protect the shingles against decay and insects. Red cedar has a stronger reddish color; its tannin could potentially bleed and cause staining on the surface of the shingle. White cedar does not bleed as much, so it is easier to stain. On roofs, red cedar is used more.

What is a square?

A square is a term meaning the amount of shingles necessary to cover 100 square feet (with 5’’ (12.7 cm) exposure - standard). One square is 4 bundles of shingles.

Are SBC shingles made from certified wood?

Most of our logs come from FSC, SFI or ISO-14001 certified forest.

Why should you choose SBC cedar shingle instead of another siding?

Cedar shingles are a noble material, which come from a renewable resource, and it has been used for centuries. It has often been imitated, but its look and warmth have never been equalled. SBC shingles combine well with stone, brick or other wood siding and can create various architectural designs. It has very good thermo-dynamic and acoustic properties and are perfect for extreme weather conditions; its natural oils offer a protection against insects and the fact that cedar is long lasting makes SBC cedar shingles the option when it is time to protect and highlight your project. Finally, thanks to SBC’s large array of factory-stained shingles and their ultimate protection, you can have peace of mind for years.

Are SBC Eastern white cedar shingle high wind resistant?

There is no such test made, but the long-standing New England traditional coastal buildings have proven that Eastern white cedar shingles keep out wind-driven coastal storms and resist to freeze/thaw cycle. If you want a stronger protection against wind, you can do this by lowering the exposure to 4” (10.2 cm) when installing the shingles.

What is the difference between “regular” and “resquared and rebutted” (R&R) cedar shingles?

SBC resquared and rebutted (R&R) cedar shingles are top-of-the-line shingles. They are perfectly straight, with parallel sides. They are cut one by one to improve the finish and natural beauty, which also reduces by up to 50% on installation time. At SBC, we are specialized in resquared and rebutted (R&R) shingles, but we also offer regular shingles to customers who request them.

Why should you use SBC resquared and rebutted (R&R) shingles?

Our R&R shingles are chosen to give the best overall appearance. Their installation is fast and easy, which considerably reduces labor costs.

Is it possible to preserve the cedar’s natural color?

Left natural, SBC cedar shingles will change color and will gradually become grey. This change of wood color comes from Mother Nature (sun, rain, wind…). It is possible to preserve the cedar’s natural color with a clear oil coating, which will slow down weathering of wood by a few years.

If I decide to let my shingles weather naturally, how can I maintain a uniform color on the cedar shingles on all four sides of my house?

The color of naturally weathered shingles varies according to its exposure to moisture, sunlight and salt water. Those with greater exposure will loose their natural, fresh-sawn color faster than the ones that are more exposed. The only way to get a more uniform color for a longer period of time is to apply a Weathering Stain, Bleaching Oil or Enviro Bleach. At SBC, we offer this option directly form our facility. If you decide to go this route by yourself, be sure to clean the shingles thoroughly first using a mix of water and laundry soap. Don’t forget that this treatment option will help maintain some sort of color uniformity to your shingles but there will always be some variations caused by natural elements. This is what makes the beauty of real cedar shingles. Avoid pressure washing.

Is it possible to obtain the look of naturally weathered shingles right at installation?

In collaboration with PPG/Olympic®, we offer this possibility, thanks to their Weathering Stain, the Bleaching Oil and the Enviro Bleach. It consists of a factory application made for people searching for a naturally weathered look for their shingles. It offers many advantages: uniform look, stability and protection for wood.

Should I stain my shingles or should I leave them natural?

The answer to this question depends on the look you wish to have for your house. Naturally weathered, SBC cedar shingles will slowly become silver gray, a process which will make them very appreciated by experts. For people who want to have a uniform color, staining is the perfect option. At SBC, we can answer your needs for colors, thanks to our unique dipping coating process. Our high quality standards allow us to offer the best warranty program in the industry (see Warranties section for more details).

If I want to stain my shingles, what is the best option?

The easiest and most long-lasting option is to let us stain the shingles for you. Buying SBC factory-stained shingles is the best decision you can make, because you will obtain maximum protection on all faces, a uniform stain thickness and a warranty on the finish.

Do SBC cedar shingles need to be treated?

No, the natural preservatives of cedar protect our shingles from ravages of fungi, humidity, and insects. They are often left natural and turn silver gray with time. However, they can be treated with preservatives or stains to achieve a different visual effect.

What kind of stain do you use for your factory-stained shingles?

We use latex coating that is 100% acrylic and water repellent, mainly from PPG/Olympic® MachinecoatTM products. PPG is the inventor and the world leader of machine applied coatings. PPG stains are made especially for machine application and their quality is superior. They can be washed and are made to resist to extreme weather and mildew.

What types of finishes are available?

We offer 4 types of factory applied finishes: aging stains, clear solutions, semi-transparent or solid colors.

What colors do you offer?

SBC can stain in virtually any color. Even if we use mainly PPG/Olympic® stains, we can match all colors with our high tech photo spectrometer.

If I buy SBC factory-stained shingles, do I have to do some touch ups?

Yes, apply touch up on all cuts, planed edges, and on all exposed bare wood.

Do SBC shingles have a warranty?

Yes, we offer the best manufacturer’s warranty on our factory-stained shingles (sidewall application only). In conjunction with PPG/Olympic®, we offer a warranty program on coating. We also offer warranty against wood decay. See Warranties section for more details.

Which grade of shingles should I use for roof?

Extra “A” only.

At installation, what is the spacing required between SBC shingles?

The necessary spacing varies according to shingle’s moisture content and weather conditions at installation. Our natural shingles contain 20% to 25 % moisture, and our kiln-dried and factory-stained shingles contain about 10% to 12% moisture. Due to this variance, spacing for both types of shingles will be different. We must take into consideration that natural shingles will shrink after installation, while kiln-dried and factory-stained ones will expand. As a general rule, a space of 1/16’’ (0.15 cm) is required for natural shingles and 1/8’’ to 1/4’’ (0.3 to 0.6 cm) for kiln-dried and factory-stained shingles.

What is better to use: Nails or Staples?

Both options are acceptable but it is important to use rust-resistant fasteners only. For nails, we recommend minimum 7/32’’ (0.6 cm) head, and for staples, 7/16’’ (1.1 cm) crown and 16 gauge minimum. At all times, the fasteners must penetrate 1/2’’ (1.3 cm) into solid underlayment. If you use air tools to fasten your shingles, make sure to set the air pressure so that fasteners don’t countersink into your shingles.

When installing cedar shingles, how many nails or staples should I use?

A shingle less than 8” (20.3 cm) wide should receive only two fasteners (about 3/4” (1.9 cm) from each edge and 1” (2.5 cm) above the butt-line or overlapping shingles). However, a shingle of 8” (20.3 cm) and wider should receive four fasteners. The extra two fasteners should be placed near the center of the shingle, about an inch (2.5 cm) apart.

Is it necessary to leave an air space between cedar shingles and the underlayment?

Good air space behind all siding products is essential and can be achieved in a variety of ways. Wooden laths or a ventilation membrane such as Mortairvent by Advanced Building Products are 2 options to keep an air space. These materials allow trapped moisture a way to drain out. They also allow drying of both the shingles and the underlayment. This technique is beneficial as it protects shingles from rotting and paint from peeling. When you make your choice among the two possible options, make sure to consider the thickness of the air space: Wooden laths are typically 3/4’’ (1.9 cm) thick and ventilation membrane is usually 1/4’’ to 7/16’’ (0.6 to 1.1 cm) thick.

Why are some of my shingles starting to cup or curl?

Some curling on shingle is normal since cedar shingles are a natural material. Excessive cupping and curling is usually due to improper installation. Here is a list of the most important points to follow to avoid this problem:

  • Shingles exposure: Respect the recommended exposure (standard is 5’’ (12.7 cm)).
  • Fasteners placement: 3/4’’ (1.9 cm) from the edge and 1’’ (1.5 cm) above butt-line.
  • Spacing between shingles: Gaps need to be big enough so the shingles can expand according to the humidity level and wood moisture content.
  • Air tools pressure: Set pressure so the fasteners does not countersink into shingles.

Do SBC cedar shingles require much maintenance?

No, and there are two options: wait for the natural weathering process or apply stain. If you decide to stain your shingles, it is preferable to buy the SBC factory-stained shingles. They will thus be covered with quality stain on all faces, which allow SBC to offer warranties of up to 25 years against cracking and peeling. Whether left natural or factory-stained, it is recommended to clean your shingles each year. This way, they will remain clean and free from any deposit.

How do I clean my cedar shingles?

Wash down with a hose and a mild detergent. Avoid pressure washing.

What is extractive bleeding and how can we clean it off?

The Eastern white cedar that we use for manufacturing our shingles does not have a lot of tannin, compared to its cousin the Western red cedar. Nevertheless, extractive bleeding of wood may occur on the surface of our shingles, even more on those stained of a light color. Extractive bleeding is characterized by the wood tannins which are dissolved with moisture and which then migrate to the surface of the product. Rain will sometimes wash these stains away; however if left to weather, the sun can cause polymerization. If this happens, compounds containing oxalic acid or water/household bleach mix appear to be the most effective at removing extractive bleeding stains (ensure you use proper safety precautions and follow the oxalic acid compound manufacturer's application directions). Extractive bleeding does not mean there was a defect in manufacturing or in the application of the finish, it is a natural phenomenon that occurs in applications. At SBC, we do everything we can to avoid extractive bleeding on our factory-stained shingles. We dry our shingles properly before applying any coatings, we use only the best stains available and we even use tannin blocking products when needed.

What is the white moss on Eastern white cedar shingles?

The white moss we sometimes see on green cedar shingles is caused by the cedar moisture content. It is not mold and mildew. This reaction is a possible occurrence on white cedar shingles kept tight in a bundle after a few weeks, especially during summer months, and is not related to any specific treatment to the logs. This white moss will wash away with rain and wind. There is no need to clean these shingles.

If I have mildew on my shingles, what should I do?

Mildew is a fungus found virtually everywhere in nature; all it needs in order to flourish is oxygen, a food source, moisture, and temperatures between 40 ºF and 90 ºF (4 ºC to 32 ºC). Clean your house with one part of household bleach, two to three parts of warm water or use a commercial mildew cleaner. Also, be sure to scrub the surface gently with a sponge mop or soft-bristle brush after applying the bleach or cleaner (always be careful to protect your skin and eyes during this application). After 15-20 minutes, thoroughly rinse with water to remove any remaining cleaner or bleach solution.

Where can I buy SBC Cedar shingles?

You can purchase SBC shingles from your local retail lumberyard. Ask for SBC shingles by name. If you can’t find them, contact us and it will be our pleasure to refer you to the nearest retailer, who carries our shingles.

754, 8e Rue, Saint-Prosper (Quebec)  G0M 1Y0 Canada   Telephone: 418 594-6201 / Fax: 418 594-8334 /