This is a list of "UNDERLININGS" products and suppliers.
| UNDERLININGS For Built-Up Roofing | A.PROCTOR GROUP LTD |
| FILON PRODUCTS LTD | |
| ICB (WATERPROOFING) LTD | |
| RADMAT BUILDING PRODUCTS LTD | |
| SOPREMA UK | |
| UNDERLININGS For Torch-On Roofing | ICB (WATERPROOFING) LTD |
| RADMAT BUILDING PRODUCTS LTD | |
| SIKABIT BITUMINOUS ROOFING | |
| SOPREMA UK | |
| UNDERLININGS For Waterproofing | DELTA MEMBRANE SYSTEMS LTD |
| NEWTON WATERPROOFING SYSTEMS | |
| RADMAT BUILDING PRODUCTS LTD | |
| SOPREMA UK | |
| TRITON SYSTEMS | |
| WYKAMOL GROUP LTD |