Underlayment
Manufacturers offer technical support and/or product sheets that can answer your questions regarding performance or application of proprietary products.


Regular Members

American Olean
Phone: (214) 398-1411

Daltile
Phone: (214) 398-1411

Summitville Tiles, Inc.
Phone: (330) 223-1511
Associate Members

AcoustiCORK/Amorim Cork Composites
Phone: (800) 558-3206

Allied Custom/Plasterworks, LLC
Phone: (405) 366-9500

Blanke Corporation
Phone: (800) 787-5055

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

Fortifiber Building Systems Group
Phone: (800) 773-4777

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

James Hardie Building Products
Phone: (866) 4HARDIE

Laticrete International, Inc.
Phone: (800) 243-4788

MAPEI Corporation
Phone: (800) 42-MAPEI (62734)

Maxxon Corporation
Phone: (800) 356-7887

MERKRETE/ParexLahabra
Phone: (800) 851-6303

NAC Products, Inc.
Phone: (800) 633-4622

National Gypsum Company
Phone: (704) 365-7302

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

Polyguard Products, Inc.
Phone: (214) 515-5000

Protecto Wrap Company
Phone: (800) 759-9727

R B Rubber Products, Inc.
Phone: (503) 472-4691

Schluter Systems
Phone: (800) 472-4588

SGM, Inc. (Southern Grouts and Mortars)
Phone: (800) 641-9247

TEC Specialty Construction Brands, Inc.
Phone: (800) 323-7407

Texas Cement Products, Inc.
Phone: (713) 682-8411

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

wedi
Phone: (877) 933-9334


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