Is ZMesh the only listed product for under-roof snow and ice melting?

Yes. ZMesh (along with Heatizon’s Tuff Cable) is the only product authorized under UL Standard 1588 and ETL listed in the United States and Canada for snow and ice melting installed under roofing materials. This makes Heatizon’s under-roof systems the only products compliant with NEC Article 426 for under-roof and enclosed panel heating applications. No other manufacturer’s under-shingle heating product holds this listing.