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.

“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

“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

“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

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

Latest News

Project Profile – Excel Roofing and Siding

Project Profile – Excel Roofing and Siding

These are a few projects sent in by NSA member Kevin Creighton of Excel Roofing and Siding. They are located outside of Philadelphia, PA in King of Prussia. Vermont Slate Roof - Haddonfield, NJ Slate and Copper Roofs Restoration - Reading, Pa

read more
Let’s Travel to Brittany, France

Let’s Travel to Brittany, France

This month we have been travelling to FRANCE ! Apart from being my wife´s country and mine (half of me only !!) it is the biggest importer and so consumer of Natural Slate in the world. And in France, Brittany in...

read more

Member Project Gallery

NSA Mission
National Slate Association’s Mobile Field Guide
Subscribe to our Newsletter