At StonePly, quality testing and technical and performance standards have been established to assure long-term durability and strength of the panels. These strict standards are designed to provide a beautiful, trouble-free, and virtually maintenance-free product. Since other stone panel products are available for construction, architects, or other specifiers who are looking for the strength and durability of StonePly, should specify a product that meets established codes and specifications for that level of performance.

Get downloadable StonePly specifications here.

Comparison Matrix

Property	Common Stone cladding (1 3/4" granite)	StonePly HC	StonePly ACM
Impact Resistance	60 ft lbs	3,200 ft lbs	1500 ft lbs over backup
Weight (approximate weight, varies by stone type)	27 lbs/sqft	Less than 4 lbs/sqft	Less than 4 lbs/sqft
Large Missile Impact Test		Passed	Passed when adhered to solid substrate
Install Method	Kerfs or slots in stone and steel anchors	Z clips, concealed screws or structural silicone adhesive	Adhesive
Install Speed	Very slow	Fast	Fast
Weight per 4' × 4' Panel (approximate weight, varies by stone type)	432 lbs	54 lbs	40 lbs
Thickness of Assembly	4" to 6"	3/4" to 2"	1/4"
Fire Ratings	Class A (NFPA Standard) Class I (UBC Standard)	Class A (NFPA Standard) Class I (UBC Standard)	Class A (NFPA Standard) Class I (UBC Standard)