15 vs 30 Felt for Roofing: Which is Best?: A Quick Guide to Choosing the Right Roofing FeltSarah ThompsonJun 13, 2025Table of ContentsWeight and Durability ComparisonCost ConsiderationsInstallation EaseWeather ResistanceFAQFree Smart Home PlannerAI-Powered smart home design software 2025Home Design for FreeUnderstanding the difference between 15 vs 30 felt for roofing is crucial for making informed decisions in your roofing projects. The choice between these two options can significantly impact the longevity and functionality of your roof.Roofing felt, often referred to as tar paper, comes in two popular thicknesses: 15-pound and 30-pound felt. The weights correspond to the material's density per square, covering an area of 100 square feet. Deciding which felt to use is essential for maximizing both protection and cost-effectiveness.Weight and Durability ComparisonThe fundamental difference between 15 and 30 felt lies in their respective weights and durability levels. Being thicker and heavier, 30 felt is known for its robust durability and heightened resistance to extreme weather conditions, making it ideally suited for regions facing harsh elements. In contrast, 15 felt offers a lightweight and manageable option, often favored in DIY roofing projects, albeit at the potential cost of reduced protection.Cost ConsiderationsWhen looking at pricing, 15 felt is generally the more economical choice compared to its 30-pound counterpart. For those working within a limited budget, opting for 15 felt could be appealing. However, it’s essential to factor in potential future expenditures on repairs and replacements, as the initial savings could be outweighed by long-term costs associated with less durable materials.Installation EaseBoth 15 and 30 felt are straightforward to install, but the lighter weight of 15 felt tends to make it more accessible for DIY enthusiasts. Contractors, however, may lean towards 30 felt because of its superior durability and overall performance, especially in professional installations.Weather ResistanceIn areas susceptible to heavy rainfall or snowfall, 30 felt provides improved weather resistance thanks to its enhanced weight and thickness. This increased durability plays a crucial role in preventing leaks and water damage, ultimately protecting your home from expensive repair bills in the future.FAQQ: Which type of felt is better for a DIY project, 15 or 30 felt?A: For those new to roofing, 15 felt is simpler to handle. However, considering the durability benefits of 30 felt may result in better long-term value.Q: What is the typical lifespan of each type of felt?A: Typically, 30 felt boasts a lifespan of 20 years or more, while 15 felt generally lasts between 10 to 15 years.Home Design for FreePlease check with customer service before testing new feature.