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Buckingham Slate

Welsh settlers in Virginia discovered a vast supply of slate and, realizing its usefulness, roofed their homes with the wonder rock. Unbeknownst to them, their discovery would prove to be one of the strongest and most popular slates in the world, Buckingham Slate.

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Intro

In the 18th century, Welsh settlers investigating the natural riches of Virginia uncovered a vast store of unusual slate; deep-blue-black color, it glittered in the sun. Impressed, they used this wonder-rock to build new homes. This slate would prove to be the most lasting, unfading, and popular slate product available anywhere and can be seen on some of America's finest buildings including Ford's Theatre, The Smithsonian Castle (right image), and Harvard University.

History

In the 18th century, Welsh settlers investigating the natural riches of Virginia uncovered a vast store of unusual slate; deep-blue-black color, it glittered in the sun. Impressed, they used this wonder-rock to build new homes. This slate would prove to be the most lasting, unfading, and popular slate product available anywhere: Buckingham Slate.

Over time, innumerable local quarries formed to extract and capitalize on this valuable material. And while Buckingham Slate can last centuries, of all these quarries only the Buckingham Slate Quarry, Arvonia, VA, remains as one of America’s oldest operating quarries.

As it happens, the Appalachian region is rich with different slate types, unique in color, hardness, and texture. Buckingham Slate, for instance, is tremendously hard and long lasting. With a lifespan measured in centuries, it commonly outlasts the buildings it roofed, reused time and again, recycled from one project to the next.
In contrast, softer products like Chapman slate are beautifully colored but fragile and short-lived. They are recycled less often, but produce less waste than any synthetic alternative. Of the three, you can be confident that Buckingham Slate is the most environmentally friendly.

Beyond its utility, Buckingham Slate is best known for its blue-black coloring and distinctive glossy shine. Buckingham Slate contains an unusually high amount of the mineral quartz, giving it a high-gloss shine. On sunny days, these slates can reflect the intensity of the sun; take care to avoid being dazzled by any roof clad in Buckingham Slate.

For slate, beauty and longevity are comfortable friends. And this is especially true for Buckingham Slate. Discovered during America's birth, Buckingham Slate products have lasted only as long as our country is old. The best data we have for its durability is only as young as we are - no telling how far it, or we, can go. Each passing year is new proof of our mutual resilience.

Info

Also called:
  • 100% natural product
  • Exceptionally durable, 300-year useful life
  • Proven historic performance & aesthetically pleasing
  • Non-combustible—Class A Fire Resistant
  • Resistant to acid rain, ultra-violet light & chemicals
  • Withstands freeze/thaw cycles & high temperatures
  • Rated Class 3 and Class 4 Hail Impact Resistance (3/4 to 2 inch ice balls)
Before
after

Data & ASTM

This Slate*
ASTM Standards*
Breaking Load
771 pounds
575 pounds minimum
Water Absorption
0.183"
0.25% maximum
Depth of Softening
0.0002"
0.002" maximum
ASTM Rating
S1
Lengths
Widths
Exposure**
24
12, 14
10.5
22
11,12, 14
9.5
20
10, 11, 12
8.5
18
9, 10, 11, 12
7.5
16
8, 9, 10, 11, 12
6.5
14
7, 8, 9, 10, 11, 12
5.5
12
6, 7, 8, 9, 10, 12
4.5
Thickness (Inches)
Pounds per Square
1/4 - 3/8
950 - 1050
3/8 - 1/2
1300 - 1400
1/2 - 5/8
1800 - 2100
5/8 - 3/4
2500 - 3000
* As tested by ASTM. Test report available upon request.
**3" Headlap, inches
More than a roof.
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