The Purpose of Roofing Felt - Is Roofing Felt Necessary? - IKO Roofing
Perkins Roofing Corp. - Ever wonder what those silver circles are on roofs? Those are called tin caps, and are used to secure felt paper and other roofing materials in place in
How to Attach Roof Felt on a Shed: 15 Steps (with Pictures)
How to Felt a Flat Roof | Step by Step Guidance | Checkatrade