Natural Stone Institute Accredited Member Search

There are three different Accreditation designations which have verified best practices in the following:

Heavy Commercial: Accredited Commercial A Contractors specialize in large-scale engineered high rise cladding.
Light Commercial: Accredited Commercial B Contractors specialize low rise cladding and interiors. Commercial A Contractors are also qualified for this work.
Countertops: Accredited Fabricators specialize in countertops and other non-engineered residential or commercial interiors.

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