Natural Slate Roofing in North America


Why Join The
National Slate Association?

The mission of the National Slate Association is to establish a material and installation standard for, and promotion of, natural roofing slate in North America. The association, which started in 1922 and was reformed in 2002, spans quarriers, contractors, architects, consultants, and distributors with a connection to natural slate. Primary goals of the association are to keep members updated with slate relevant information, give access to the most experienced resources the industry offers, and to promote the education of slate to future generations. If you’re looking to prosper in the slate industry, this association is your key.

Find Contractors, Homeowners and Suppliers

A National Resource For Technical Support

Available For
All Slate Questions

A Community Of



Join a community of contractors across the USA that is supports by the National Slate Association!



Learn more about how the National Slate Association supports architects across the USA!



The National Slate Association helps homeowners across the USA maintain their homes quality!



This guide provides a description of the quality required, materials, workmanship, dimensions, of work so the user can specify a slate roof properly, accurately, and quickly.


Weather & non-weather slate colors range from black, gray, green, purple, red. The beauty of the stone is found in the colors.

Stay Informed

We provide the latest industry info to help make informed decisions and costly missteps

Top Resource

Members get access to the wealth of knowledge from industry professionals who are happy to help

Promote the Slate Industry

Continuing education is a necessity towards future generations of slate roofers to keep the tradition strong

Member Project Gallery


“The NSA offers the wisdom of many experts in the slate industry who have decades of experience. If I ever need any slate related knowledge, I turn to the NSA”.

Lucas Severance
Lucas Severance

“It’s great meeting a variety of people who have skills in various fields such as architects, consultants, contractors, and quarriers. Where else can you find such diversity in one association?”

Ronny Roseveare
Ronny Roseveare

“I never thought I’d find my kind of association at the center of the slate world. Camaraderie, information, material sources…the NSA has it all!”

Bob Williams
Bob Williams

Latest News

Slate Roof Repair

Slate Roof Repair

Slate Removal and Replacement in Roof Maintenance The removal and replacement of individual slates is an important...

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National Slate Association’s Mobile Field Guide is available free of charge via an internet browser on your smart-phone* or tablet when an internet connection is available.Or you may also scan the QR code here with your QR reader.

Click here to download the Mobile Field Guide press release.

*The NSA Mobile Field Guide is best viewed on iPhones, iPads and the newer Android phones. Windows® smart phones are not supported at this time. The mobile site is not intended or formatted for desktop computers or laptops.