Synthetic vs. Felt Underlayment for Metal Roofing: Which Is Best?
Choosing Roofing Underlayment - Fine Homebuilding
The Purpose of Roofing Felt - Is Roofing Felt Necessary? - IKO Roofing
Standard Duty Asphalt Roofing Felt (15#) – Gardner Coatings
J Quintero Roofing - When should I use 30lb felt? Most standard pitched roofs only need a 15lb. felt for proper underlayment. 30lb. is used for many specialty applications such as: low
What Is Felt Paper? Why Is Felt Paper Necessary For Roofs?
What is the difference between #15 and #30 roofing felt?