Simpson Strong Tie

Joist Hanger

Kale Eksport (Export)

Kalesinterflex

Kebony

Kebony Pine

Novum Structures, L.L.C.

KK-System

Berridge Metal Roofing & Siding

Kynar 500 | Hylar 5000

Kawneer Company, Incorporated

Lamin XXV

Laminados de Barro, S.A. de C.V.

Laminados de Barro

Laminam, S.p.A.

Laminam

Claytec Lehmbaustoffe GmbH

Lehmbauplatten (Clay Board)

Polycor, Incorporated

LiteCore

Louisiana-Pacific Corporation (LP)

Louisiana-Pacific Corporation

Louisiana-Pacific Corporation (LP)

LP SmartSide Trim & Siding

Luccon Lichtbeton, G.m.b.H.

Luccon

Ludowici Roof Tile, Incorporated

Ludowici Roof Tile

Continental Cut Stone (CCS)

Lueders Limestone

Magnesiacore

Magnesiacore Construction Panels

Bayer, A.G.

Makroform | Makrolon Multi

Bayer, A.G.

Makrolon

MBCI

MBCI

Mechanical Metals, Incorporated

Mechanical Metals

Alpolic Company

Metallic

Kingspan Group, PLC

Metecno-Aluma Shield

Ironrock Capital, Incorporated

Metropolitan Ceramics

Alpolic Company

Mica