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
![ASTM D226 Synthetic Roof Underlayment Customized Colors Logo Printed Synthetic Roofing Membrane - China Fully Synthetic Roofing Membrane Underlay, Roofing Material Waterproof Breathable Underlay | Made-in-China.com ASTM D226 Synthetic Roof Underlayment Customized Colors Logo Printed Synthetic Roofing Membrane - China Fully Synthetic Roofing Membrane Underlay, Roofing Material Waterproof Breathable Underlay | Made-in-China.com](https://image.made-in-china.com/202f0j00ekOzVdmylYua/ASTM-D226-Synthetic-Roof-Underlayment-Customized-Colors-Logo-Printed-Synthetic-Roofing-Membrane.webp)
ASTM D226 Synthetic Roof Underlayment Customized Colors Logo Printed Synthetic Roofing Membrane - China Fully Synthetic Roofing Membrane Underlay, Roofing Material Waterproof Breathable Underlay | Made-in-China.com
![APOC 36-in x 71.75-ft 200-sq ft Felt Roof Underlayment in the Roofing Underlayment department at Lowes.com APOC 36-in x 71.75-ft 200-sq ft Felt Roof Underlayment in the Roofing Underlayment department at Lowes.com](https://mobileimages.lowes.com/productimages/ffcbc822-465d-4a3c-9dc4-76743e4d10cb/63678517.jpg?size=pdhism)