• Multi Gables

    Slate looks particularly beautiful on a large expanse of a tall roof.

  • Roof and Gables

    Custom slate mixtures can create a unique look.

  • Peaked Roof

    Pleasing architectural effects can be achieved by blending different sizes and colors of slate.

  • Aged Roof Slate Detail

    Slate roofing tiles are still manufactured by hand using traditional methods.

  • Rounded Tower

    Slate is one of the most aesthetically pleasing and durable of all roofing materials.

  • French Chateau Roof

    Installed properly, slate roofs require relatively little maintenance and will last 75 to 150 years and longer.

  • Slate Detail

    Textural slate roofs incorporate slates of different thicknesses, uneven tails, and a rough texture.

  • House on Cliff

    When struck, high grade slate tile will emit a clear, solid sound. Severely weathered slates give off a dull thud when tapped.

  • French Style Roof with Round Tower

    Slate, the most lasting roofing material known, should be laid by roofers of experience and training.

  • Slate Detail

    Visible bands on the cleavage face of slate represent geologic periods.

  • Steep Gray Roof with Brick Chimney

    Slates are also classified as fading or unfading according to their color stability.

  • Steep Dark Roof with Subtle Varigation

    Slate is a fine grained, crystalline rock derived from sediments of clay and fine silt which were deposited on ancient sea bottoms.

  • Varied Texture Roof Over a Brick Facade and Chimney

    The metamorphic processes of geologic change necessary to produce slate are dependent upon movements in the earth’s crust and the resulting heat and pressure.

  • Black Roof

    The presence of carbonaceous matter, derived from the decay of marine organisms on ancient sea floors, gives rise to the black colored slates.

  • Bay Landing Hotel

    Slate consists of minerals that are stable and resistant to weathering and is, therefore, generally of high strength, low porosity, and low absorption.

  • Steep Tudor Style Roof

    Slate is composed of clay and mud that changed over time into stone with inclusions of quartz, mica, and chlorite.

  • Multi Color Roof

    While durable, slate is brittle and can't be bent. It requires steel or copper flashing to cover corners and odd angels.

  • Blue Roof

    While most slate is gray, it can come in a variety of colorful shades from orange to green to blue to almost black.

  • Large Steep Gray Roof

    Most of the slate mined throughout the world today is used to produce roofing tiles.

California Slate Company, Inc.

3344 Market Street
San Francisco, CA 94114
+1 (415) 864-6862 Work
+1 (415) 814-2667 Fax
+1 (415) 710-9956 Cell

California Slate Company Inc. provides high quality roofing slate material to California and the United States. Founded in 2006, based upon twenty years of experience in the roofing slate industry, we pride ourselves on detailed knowledge of our products and their application. We focus exclusively on roofing slate together with the needs of home owners and contractors installing it. We have well-established and long-term relationships with many of the best slate producers all over the world. When it comes to any slate roofing project, California Slate Company delivers unparalleled service and expertise. We look forward to working with you on your next project.

Why Slate?

Natural slate roofing is simply the best roofing material available. It is the most durable, stable, longest lasting, and most attractive material you can put on your roof. Naturally created over millions of years, slate is both abundant and environmentally friendly.

The slate roofing industry is an old and very traditional industry. Natural slate is found all over the world, and each region has its own distinctive materials and production methods. Our journey becoming completely familiar with this peculiar industry has led us to discover high-quality materials with interesting colors, unusual textures, and significant uniformity. We can advise you on just the right slate for your application and tastes and then source and deliver that material.

At the heart of our company lies a truly astounding product, created by nature, and unmatched by anything produced by modern industrial methods (though many have tried).

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Globes Illustration Showing Slate Source Locations