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Slate Roofing

Genuine slate roofing is built to endure. When premium slate roofing is installed by experienced slate roofing contractors, the result is a roof that will not only protect for decades, but give your home the timeless, sophisticated look seen on the finest homes.

Slate roofing has been in use since the middle ages, and is seen in exceptional architecture throughout the world. Slate is naturally fireproof and waterproof and, when installed by an experienced slate roofing company and cared for correctly, can last for decades or even centuries.

For a slate roof to last as long as the material allows, the installation must be completed by a knowledgeable roofing company with an understanding of how to work with slate. With nearly three decades of experience, Topper Construction has mastered the time-tested, traditional methods needed to install, repair or replace slate roofing.

What to Know When Selecting Slate Roofing

The appearance of your slate roof depends on three main factors related to the type of slate and the installation methods used — color, pattern, and tile size.

Choosing Slate Color – Weathering vs. Non-Weathering Slate

Weathering slate roofing changes color as the slate ages, resulting in earth tones on the lighter end of the color spectrum. Brown, bronze, cream, light gray and greens can all appear in weathering slate. This variable weathering is what creates the multi-colored, old-world look seen in many homes throughout Maryland and the Northeast.

Non-weathering slate retains its color — usually a dark gray or black. Without the variable weathering to create alternating colors, non-weathering slate roofs appear as a singular uniform tone. This lends itself best to more formal architectural styles.

Random or Constant Width Slate Roofing Patterns

Installing slate tiles with random widths results in an offset, random pattern that creates a more natural, style. Random width tiles are still installed at constant tile heights, for a uniform line across each horizontal row.

Constant slate roof installations consist of identical widths of tiles, installed in a uniform pattern. This results in a more formal, manicured look.

When deciding between random or constant width slate roofing, think of the difference between a hand-built rock wall and an evenly spaced brick wall, and decide which style would complement your home’s architectural styling best.

Size and Thickness of Slate Tiles

Random width slate tiles are typically either 16” or 18” on residential roofs, while some commercial buildings may be outfitted with 20”width tiles. Constant width tiles are usually 16” x 8”, 16” x 10”, 18” x 12” or 20” x 10”.

Smooth textured slate is generally between 3/16″ to 1/4″ in thickness, while the heavier textured slate is between 1/4″ to 3/8″. The weight of the slate and the underlying roof structure must be considered when deciding upon the thickness of slate to use.

With Topper Construction, you’ll see the benefit of nearly three decades of experience. For the classic durability of a genuine slate roof, contact Topper Construction at 301-874-0220 or email us at We can help you with slate roofing in Delaware, Maryland, Pennsylvania, West Virginia, and Northern Virginia.