Bonsal American
Phone: (704) 525-1621

C-Cure
Phone: (800) 895-2874

CertainTeed Gypsum, Inc.
Phone: (800) 233-8990

Custom Building Products
Phone: (800) 272-8786

Fin Pan, Inc.
Phone: (800) 833-6444

Georgia-Pacific Dens-Shield
Phone: (800) 225-6119

James Hardie Building Products
Phone: (888) JHARDIE

MAPEI Corporation
Phone: (888) US-MAPEI

National Gypsum Company
Phone: (704) 365-7300

Mesh Mount Paper & Tape
Phone: (800) 456-7273

North America Tile & Tool Co. (NATTCO)
Phone: (859) 525-8891

Southern Grout & Mortars
Phone: (800) 641-9247

United States Gypsum Company (USG)
Phone: (312) 606-4000

Wedi Corporation
Phone: (770) 366-6835

If your question is still unresolved, you have several choices to explore other means of technical support.

Situation May Require an On-Site Inspection to resolve the problem.

Installation May Require Sample Testing

Questions Regarding Handbook Guidelines or American National Standards