| FLAT ROOF Drainage Systems | ACO TECHNOLOGIES PLC - BUILDING DRAINAGE |
| ALUMASC WATER MANAGEMENT SOLUTIONS |
| COMPONENT DEVELOPMENTS |
| DANI ALU UK LTD |
| OSMA |
| FLAT ROOF Escape Rescue Maintenance Access Routes | DANI ALU UK LTD |
| FLAT ROOF Panels | PAROC PANEL SYSTEM |
| FLAT ROOF Paving and Tile Supports | ALUMASC WATER MANAGEMENT SOLUTIONS |
| DANI ALU UK LTD |
| ICB GROUP |
| SOPREMA UK |
| FLAT ROOF Recovery Board | ROCKWOOL LTD |
| FLAT ROOF Upgrades Upgrading | SOPREMA UK |
| TATA STEEL UK |
| FLAT ROOF Vents | A1 FLUE SYSTEMS |
| CAVITY TRAYS LTD |
| KLOBER LTD |
| SE CONTROLS |
| UBBINK UK LTD |
| FLAT ROOF Wall Upstands | DANI ALU UK LTD |
| FLAT ROOF Waterproofing | DELTA MEMBRANE SYSTEMS LTD |
| EUROCELL PLC |
| ICB GROUP |
| RADMAT BUILDING PRODUCTS LTD |
| SOPREMA UK |
| TOR COATINGS LIMITED |
