Understanding Roofing Felt Rolls for Your Next Project: 1 Minute to Choosing the Right Roofing Felt RollSarah ThompsonSep 09, 2025Table of ContentsTips 1:FAQTable of ContentsTips 1FAQFree Smart Home PlannerAI-Powered smart home design software 2025Home Design for FreeRoofing felt rolls are a staple in both residential and commercial construction projects, acting as a critical underlayment between the roof deck and the final exterior roofing material. But what exactly are they, and why are they essential? Roofing felt is typically made from a combination of natural or synthetic materials, saturated with asphalt to create a water-resistant barrier. When installed correctly, felt underlayment protects your roof from moisture infiltration, helps prevent leaks, and provides a smooth surface for shingle application.If you're planning a roofing project, the type and thickness of felt you choose will be determined by the local climate, roofing material, and slope of your roof. Felt rolls commonly come in two thicknesses: 15-pound and 30-pound, with the latter offering greater durability and water resistance. Installation methods vary, but most professionals recommend overlapping seams and nailing edges to ensure maximum protection. In addition, roofing felt serves as a temporary waterproofing layer during construction, safeguarding your structure against unexpected weather.As a designer, I can’t help but think about not just function but how each material impacts the long-term design integrity of the space beneath the roof. Proper installation of quality underlayment can prevent future moisture issues, which keeps your ceiling aesthetics pristine and your furnishings safe from water damage. Before you move forward, organizing the project visually and functionally can save you headaches down the line—tools like a Home Designer can be invaluable for mapping out your renovation, ensuring technical solutions align with your design vision.Tips 1:Consider climate and roof pitch when selecting felt rolls. Thicker felt may be necessary for regions with heavy rainfall or for low-sloped roofs. Always double-check manufacturer recommendations for compatibility with your chosen roofing materials.FAQQ: What is roofing felt made of? A: Roofing felt is typically a combination of fiberglass or organic mat material saturated with asphalt for water resistance.Q: Should I use 15 lb or 30 lb roofing felt? A: 30 lb felt offers more durability and water protection, making it suitable for areas prone to heavy precipitation or low-sloped roofs.Q: Is roofing felt essential for a new roof? A: Yes, roofing felt acts as a moisture barrier and provides longevity to the roof system, protecting against leaks.Q: How do you install roofing felt rolls? A: Rolls are laid starting at the roof's edge, overlapping seams, and nailed or stapled in place. Manufacturer instructions should guide exact spacing and methods.Q: Can roofing felt improve my interior design? A: Proper installation prevents moisture problems that could compromise ceiling finishes, wall treatments, and furnishings—preserving your sought-after interior aesthetic.Home Design for FreePlease check with customer service before testing new feature.