Western Specialty Contractors (formerly named Western Waterproofing Company) has promoted James Norberg to senior branch manager of its Ridgefield, N.J. branch.

Parksite Inc. announced effective April 1; it will be the full-service distributor of DuPont Corian and DuPont Zodiaq in the geographic marketing area of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island and Connecticut.

Gypsum Management and Supply, Inc. announced the acquisition of Robert N. Karpp Co., Inc., based in Boston, Mass., marking GMS’ entry into the attractive New England market.