Hickman Edge Systems LLC

High Concrete Accessories

Hilltop Slate, Inc.

Hilti Canada

Hilti U.S.

Historic Plaster Conservation Services (USA)

Holdfast Technologies

Huber Engineered Woods

Hunter Panels

Huntsman Building Solutions

Hyload

id created, Inc.

Ideal Roofing Company Ltd.

Identity Wood Products

IKO Roofing - Commercial

Impact Security LLC

Inland Coatings Corporation

Innovative Metals, Co. (IMETCO)

Innowood

Inpro

InSoFast Panels

Insulation Corporation of America

Insulation Materials Corp.

Interlock Concrete Products, Inc.

Interlock Roofing Ltd.

International Cellulose Corp.

Invisible Structures

IPA Systems, Inc.

IPG | ECP

Iron Woods

ISI Building Products

Iso Clips

ITW Performance Polymers

ITW Polymers Sealants North America

James Hardie

James River Steel, Inc.

JDR Enterprises, Inc.

Johns Manville Roofing Systems

Kalman Floor Company

Kalzip Inc

Kanalco LTD Aluminum Panel Systems

Karnak

Kassel Wood & Irons, Ltd.

Kaycan Ltd.

Kay Park Recreation

KAYU International

KCC International, Inc.

Kebony - America

Kee Industrial Products, Inc.

Keene Building Products

Keith Panel Systems

Kerkstra

Keymer USA Century International Imports, Inc.

Key Resin Co.

Kimberly-Clark BLOCK-IT* House Wrap

Kingspan

KME America Inc.

Knauf Insulation

Knight Wall Systems

Knotwood

Koster American Corporation

KP BuildingProducts

KPS Global

Kronos

Kryton International Inc

KWP

Lakeside Construction Fasteners

Lamilux

Laminam USA Inc.

Laminators Incorporated

Lanco Paints

Latexite - Dalton Enterprises, Inc.

LATICRETE International, Inc.

Laurenco Waterproofing / a division of FBC Chemical

LEA Ceramiche

Leesburg Concrete Co. Inc.

Legacy Industrial Corp.

Legacy Pre-Finishing Inc.

Le Specialiste du Bardeau de Cedre Inc. (SBC)

Lester Building Systems

Levantina USA

Levolux

LEXCOR

Liberty Cedar

LINEL

Liquid Nails Brand

Liveroof - Hortech

LMCurbs

Loctite

Long Island Tinsmith Supply Corp.

LP CanExel

Ludowici Tile

Luma Solar

LUMICOR

Lunawood

LUXYCLAD Ltd.

Lyman Roofing & Siding

LymTal Intl. Inc.

Lynx Designs

MAC Metal Architectural