3 Layer Felt Roofing System - Mike Horizon Roofing
IKO Super Shed Roofing Felt (Green Mineral / Polyester Reinforced) - 8m x 1m Roll | Roofing Superstore®
Black Polyester Shed Roofing Felt 16.4 x 3.2ft (5m x 1m) with 13mm Galvanized Roofing Nails Pack of 50 Included | Heavy Duty Premium 25 Year Life Expectancy Roof Felt : Amazon.co.uk: