California Slate Company, Inc.
natural slate roofing material
California Slate Company is the premier resource for natural slate roofing material in the United States. With more than 20 years’ experience in the industry, we have long-standing relationships with the top quarries around the world and pride ourselves on choosing only the best natural slate available. Our specific products – many exclusive to us – are selected for their durability and unique colors and characteristics. The dependability of our products is a key component of our mission.
Located in the San Francisco Bay Area, California Slate Company serves projects throughout the West Coast, including Los Angeles, Portland, and Seattle. We also ship slate to any location, and will gladly send you a full-size sample of any slate in stock.
Natural slate is an environmentally friendly product that will last for generations. Slate is not only waterproof, but fireproof – an important consideration when choosing a roofing material.
We look forward to working with you on your next project and helping you select a strikingly beautiful, long-lasting slate that’s ideal for your needs.
The test results are top-notch, making this a slate that can tolerate any weather conditions. Usually in stock at all times. A 100-year guarantee is provided for this easy-to-work-with material.
Vermont Strata Gray Slate is available in many sizes and weights.
Brazil is a relative newcomer to the slate industry, yet one of the most technologically advanced, resulting in extremely high quality control and a slate that is one of the most consistent in the business.
This is a medium to heavy stone with an average cleft.
Burgundy Slate is rough textured, heavy, and when installed provides a very distinctive look. Finding a slate of this consistent color is becoming difficult, as domestic slates which are plum or purple in color either have a tendency to weather or contain markings of other colors (usually green).
This slate can create the look of an historical Welsh slate at a fraction of the cost.
In the western United States, many residential and other structures were built to be roofed with wood shakes, wood shingles, or composite tiles, all much lighter than slate. However, many cities on the West Coast prohibit wood as a roofing material due to fire risks, and most composite materials have proven problematic. If slate is preferred for its durability and fire-resistance, but the structure is not designed for the weight of a traditional slate roof, a Slate Shield roof system may be the answer.
Instead of the heavy rafter system required by traditional installations, the Slate Shield process utilizes a series of butterfly hooks that are pre-applied to a water-repelling panel. This fast and affordable system creates a lightweight application as well as superior attachment of the slate to the roof surface.
The Slate Shield method uses half as many pieces as a traditionally installed slate roof, and so weighs in at 400-500 lbs./sq. while giving the appearance of a "standard weight" Vermont or Spanish slate roof. The 12″ x 10″ slate tiles are easy to handle, and because only the hip, ridge, and valley tiles are nailed, installation time is reduced substantially.
Slate Shield Installation Manual
Last Update: 2017-06-30