| TILE BACKER BOARDS | A1 FLUE SYSTEMS |
| AKW-MEDICARE |
| BEWI GROUP |
| BRITISH GYPSUM |
| GAIA CLIMATE SOLUTIONS LTD |
| MAGPLY |
| wedi Systems (UK) Ltd |
| TILE BACKER BOARDS AGREMENT CERTIFICATE HOLDERS | BEWI GROUP |
| wedi Systems (UK) Ltd |
| TILE BACKER BOARDS Balconies and Terraces | BEWI GROUP |
| TILE BACKER BOARDS Bonded Waterproofing Assemblies | BEWI GROUP |
| TILE BACKER BOARDS BS EN 13164 CE Marked | BEWI GROUP |
| wedi Systems (UK) Ltd |
| TILE BACKER BOARDS Fire Resistant | BEWI GROUP |
| MAGPLY |
| TILE BACKER BOARDS Shower / Wetroom / Wet Area Tiling | AKW-MEDICARE |
| BEWI GROUP |
| DURAL UK LTD |
| MAGPLY |
| wedi Systems (UK) Ltd |
