Garland Co.

GCP Applied Technologies (Grace)

Georgetown Slate

Gladding, McBean

Glavel

Glen-Gery Corporation

GMC Roofing and Building Paper Company

Great Lakes Tin

Green American Home

GreenGrid

Green Innovations

Greenrise Technologies

Green Roof Blocks

Green Roof Solutions

Greenstone Slate

Hilltop Slate, Inc.

Huber Engineered Woods

id created, Inc.

Ideal Roofing Company Ltd.

IKO Roofing - Commercial

Innovative Metals, Co. (IMETCO)

Interlock Roofing Ltd.

James Hardie

JDR Enterprises, Inc.

Kassel Wood & Irons, Ltd.

Kaycan Ltd.

Kay Park Recreation

Keene Building Products

Keymer USA Century International Imports, Inc.

KP BuildingProducts

Laminam USA Inc.

Legacy Pre-Finishing Inc.

Le Specialiste du Bardeau de Cedre Inc. (SBC)

Levantina USA

LEXCOR

Liberty Cedar

Liveroof - Hortech

Long Island Tinsmith Supply Corp.

LP CanExel

Ludowici Tile

Luma Solar

Lyman Roofing & Siding

Maibec Industries Inc.

Marble Trend Ltd.

Master Garden Products

Mayne Inc.

MCA

McElroy Metal, Inc.

MetalTech Global

Metstar Building Products, Inc.

MFM Bldg. Products Corp.

Miller Shingle Company, Inc.

Moss Acres LLC

National Prefinish

Natural Exteriors LLC

NBK North America

Nevins

New England Slate Co. (The)

Nichiha Fiber Cement

Norandex

North Country Slate®

Northern Facades - ISOclip

Northern Roof Tiles

Novik Inc.

Nudo Products

Omni Ecosystems

Ondura Roofing

Owens Corning

Pabco Roofing Products, PABCO Building Product

Permaloc

Petersen Aluminum Corporation

Phoenix Manufacturing, Inc.

Planters Unlimited

Ply Gem

Porcelanosa

Portalais

Premier Forest Products - Shingle Division

Preservation

Primescape Products

Probe Construction Products Inc.

Protecto Wrap Co.

ProVia Door

Quarrix Building Products

Rare Manufacturing Inc.

Redland Clay Tile

Regupol America, LLC

Revere Roofing

RHEINZINK America Inc.

Robetex, Inc.

Rooflite

Roser

Royal Group

Santafe Tile Corp.

Sempergreen

Sentry Building Innovations

Shakertown

Sika

Soprema Canada

Soprema USA

Steel Tile Co.