NORTH COUNTRY PRODUCT BENEFITS

Our Natural SLATE ROOFING Benefits

North Country roofing shingles, when fixed with non-corroding nails or hooks, can provide a service life in excess of 100 years.

• Requires minimal maintenance
• Durable and long lasting
• Resistant to chemical pollutants and acid rain
• Non-combustible and fireproof
• Unaffected by freeze/thaw cycles
• Environmentally safe
• Resistant to hail and other impact damage
• Performance proven on rooftops
• Delivered from stock
• Available in unfading or weathering colors
• Available in special shapes
• Available in a wide variety of sizes
• ASTM E108-10 Class A (highest) Fire Resistance Rating*
• FM4473 Class 3 or Class 4 Hail Impact Rating**
• ASTM D3161-15 Class F (highest) Wind Resistance Rating***

*As per 2015 International Building Code section 1505.2 and tested by the National Slate Association July 13, 2010.

**As tested by the National Slate Association February 25, 2010.

***As tested by the National Slate Association December 8, 2015.

Fire Resistance of Natural Slate Roofing – UL 790

“Standard Test Methods for Fire Tests of Roof Coverings”

Natural slate received IBC Class A (highest fire rating available) Fire Resistance Rating when 1/4” thick, North American slate shingles were installed at a 3” headlap over No. 30 felt underlayment on a 1/2″ plywood roof deck.

Click on report – NSA Fire Resistance Of Slate Test Report

Complying with Factory Mutual FM 4473, Specification Test Standards for Impact Resistant Testing of Rigid Roofing Materials by Impacting with Freezer ice Balls.

3/8” thick, S-1 rated, North American produced roofing slate met Class 4 requirements, surviving the impact of 2” ice balls travelling at 76 MPH.

1/4″ thick, S-1 rated, North American produced roofing slate met Class 3 requirements, surviving the impact of 1 3/4″ ice balls travelling at 69 MPH.

Click on report – Hail Test Report

Impact Resistance of Natural Slate Testing Video

It is important to note that some insurance companies offer a reduction in residential insurance premiums when a Class 3 or Class 4 rating is met.

ASTM D3161/D3161M-15:  Standard Test Method for Wind Resistance of Steep Slope Roofing Products (Fan-Induced Method)

Testing conducted by PRI Construction Materials Technologies LLC, 1/4’’ thick, S-1 rated, North American produced roofing slate met the requirements of the highest Class F (110 mph) roofing product.

Click on report:  ASTM D3161 D3161M-15 Standard Test Method for Wind-Resistance of Steep Slope Roofing Products