Lumberock

LUMICOR

Lunawood

Luxbaum Windows + Doors

Luxe Surfaces

Luxury House

Lux Windows and Glass Ltd.

LUXYCLAD Ltd.

Lyman Roofing & Siding

LymTal Intl. Inc.

Lynden Door Inc.

Lyons Sandstone

M3 Glass Technologies

Maars US Inc.

MachWall‚

MAC Metal Architectural

Madden Manufacturing

Madera

Madero

Madrid, Inc.

mafi-America, Inc.

Maharam

Maibec Industries Inc.

Malibu Ceramic Works

Mangaris

Manhattan American Terrazzo Strip Company

Manko Window Systems, Inc.

Mannington Commercial

Mannington Mills

Manomin Resawn Timbers

Manus Products, Inc.

MAPA Products

MAPEI

Mapes Industries, Inc.

Marathon Roofing Products Inc.

Marazzi

Marbelite International Corp.

Marble Mosaics

Marble Systems

Marble Trend Ltd.

Marca Corona

Marco Group Inc.

Marco Industries

Marco Skylights

Mar-Flex Systems

Marion Ceramics

Maritime Door and Window, Ltd.

Marlin Windows

Marlite

Marmiro Stones

MarShield - Div. of Mars Metal Co.

Martin Garage Door Manufacturing

Martin Pierce Hardware Inc.

Martin Portes et Fenetres

Marvin Windows and Doors

Masland Carpets, Inc.

Mason Industries Inc.

Mason Insulation

Masonite Architectural

MasonPro

Masons Supply Co.

Master Builders Solutions

MasterChem

Mastercraft by Midwest Manufacturing

Master Garden Products

Master of Plaster Finishing Systems

Masterview Windows

Matcrete Inc.

Mateflex

Materia Slab

Matter Surfaces

Maxam Metal Products Ltd.

Maxim Industries Inc.

Maxwell Hardwood Flooring

Maxwell Products, Inc.

Maxxit Systems

Maxxon Corporation

Maya Romanoff Corporation

Mayer Fabrics

Mayne Inc.

MBA Design & Display Products Corporation

MBCI

MBI Products Company

MCA

McAvoy Brick Company

McCan Walls

McElroy Metal, Inc.

McGill AirSeal Corp.

Mcmaster

McNear Brick and Block

MDC Interior Solutions

Mediterranea

Megaker by Composite Structures Institute

Melton Classics

Mercury Excelum, Inc.

Mercury Mosaics

MergeWorks

Merit Metal Products Corp.

Merkrete

Metal Building Supply Co.