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Building Products/Services
Featured Companies  We are proud to present one of the most comprehensive Websites devoted to Porphyry.
This information resource will help Architects, Contractors, Designers, and other Stone Professionals better understand Porphyry. Always desired for its hardness, porphyry is impermeable, chemical resistant and unaffected by freeze-thaw cycles.
 Oldcastle® is the North American arm of CRH plc, a major international producer of construction materials and building products. Oldcastle companies operate on 900+ locations in 48 states and 4 Canadian provinces and have 30,000 employees.
Oldcastle operates through two divisions:
Oldcastle Materials
Oldcastle Products and Distribution.
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