Porto Slate Importers (PSI) is a leading Supplier & Importer with exclusive rights to the highest quality Black Slate Slabs available in the world from Valongo, Portugal. For 50 years, black slate from the Valongo region in the district of Porto, Portugal has been best known for its durability, dramatic appearance, and is the premier choice among architects, builders, contractors, and homeowners.

VALONGO BLACKTM slate has added qualities in all applications, because it is, among all natural stones, the one which measures the best flexural strength, making it best suited for counter tops, building stone, roofing, sinks, monuments, pool coping, sills, ornamental stone, interior and exterior walls, floors, pavers, and many other design projects using Black Slate Slabs from Portugal.

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VALONGO BLACKTM

VALONGO BLACK™ slate slab with natural cleft texture finish
VALONGO BLACKTM slate slab with natural cleft texture finish
VALONGO BLACK™ slate slabs showing natural cleft texture and surface variation
VALONGO BLACKTM slate slabs showing natural cleft texture and surface variation
Porto VALONGO BLACK™ slate strips and tiles stacked in bulk for construction and landscaping use
Porto VALONGO BLACKTM slate strips and tiles stacked in bulk for construction and landscaping use
VALONGO BLACK™ natural slate cladding by Porto Slate Importers, showing varied thicknesses and deep charcoal tones
VALONGO BLACKTM natural slate cladding by Porto Slate Importers, showing varied thicknesses and deep charcoal tones
Stacked VALONGO BLACK™ slate slabs ready for shipment
Stacked VALONGO BLACKTM slate slabs ready for shipment
Worker unloading Porto VALONGO BLACK™ slate slabs in wooden crate for stone import and distribution
Worker unloading Porto VALONGO BLACKTM slate slabs in wooden crate for stone import and distribution
Stacks of authentic VALONGO BLACK™ slate tiles at Porto Slate Importers warehouse
Stacks of authentic VALONGO BLACKTM slate tiles at Porto Slate Importers warehouse
VALONGO BLACK™ slate slabs securely packed in wooden crate for export in Porto Slate Importers warehouse
VALONGO BLACKTM slate slabs securely packed in wooden crate for export in Porto Slate Importers warehouse
Stacks of Porto VALONGO BLACK™ slate slabs stored in warehouse ready for distribution from Porto Slate Importers warehouse
Stacks of Porto VALONGO BLACKTM slate slabs stored in warehouse ready for distribution from Porto Slate Importers warehouse
Large structural blocks and slabs of VALONGO BLACK™ slate at the Porto Slate Importers facility
Large structural blocks and slabs of VALONGO BLACKTM slate at the Porto Slate Importers facility
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