March 4-6, 2016
Penn Big Bed Convention
Philadelphia, PA

The National Slate Association’s annual meeting and convention will take place in Philadelphia from March 4 through March 6, 2016.

Click here for more information on hotel reservations, the convention itinerary and complete registration details.






National Slate Association award-winning Slate Roofs Design and Installation Manual

All new NSA members receive one free copy of the award-winning Slate Roofs: Design and Installation Manual, so JOIN TODAY!

HARD COVER – List Price: $125.00 (Members save 20% off list price through NSA Member Online Shop.)

SOFT COVER – List Price: $90.00 (Members save 20% off list price through NSA Member Online Shop.)

PDF FORMAT – List Price: $90.00(Members save 20% off list price through NSA Member Online Shop.). PDF will arrive on a CD; not available for download.

For larger orders or for shipping outside of the U.S., please call 866-256-2111 or email for pricing.

This award-winning manual is a culmination of five years of effort by NSA members – contractors, quarriers, and designers – who have contributed their collective knowledge and regional perspectives.

Slate roofs: the quality choice for hundreds of years

Natural stone makes a roof a unique architectural feature!

Slate occurs in many colors, textures and thicknesses offering a variety of choices for the designer. It will display its own set of natural colors from stark blacks to soft tans, greens and purples.  There is a color or mix of colors that will complement any architecture and style of building structure. Visit our slate project gallery.

Slate is hail and fire resistant — read our test results

Tests have been conducted by certified industry professionals proving the durability of nature slate roofing — proven to withstand harsh elements such as hail and fire. View the Hail Test Report and Video Documentation and the Fire Test Report.

Slate is impervious to just about everything

Slate is impervious to factors that can degrade other roofs, such as insects, rot, algae, etc.

Thinking green? Think slate…

Most slate roofs last 100 years and more. This has many implications but no other roofing material can stand the test time as well stone. Your investment is permanent, so consider the cost of ownership of a slate roof. You’ll never replace it in your lifetime. So it is fair to consider the investment in a slate roof installation over at least a century, and the cost effectiveness becomes evident. Learn more about slate as a stone.

Have a question? Call us at


Benefits of Joining the NSA

NSA Mobile Field Guide

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.

To access the NSA Mobile Field Guide, please enter in the address bar (URL) of the browser on your mobile device. Or you may also scan the QR code at the right 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.

NSA Member News

National Slate Association Receives Gold Circle Award at the 2011 International Roofing Exposition

February 23, 2011 — The NSA has received the NRCA Gold Circle Award for the publication Slate Roofs: Design and Installation Manual and for eight years of service to the slate roofing industry. Read more.

Durability of slate against hail - video now available!

February 18, 2011 — We've posted the video of the test conducted by certified industry professionals proving the durability of nature slate roofing against hail. View it now.

NSA confirms durability of slate against hail and fire

November 30, 2010 — The NSA has conducted tests on the resistance against hail and fire on slate roofing. Read more about the Hailstone Test Report and Fire Test Report.