# Understanding Roofing Felts: Types and Uses
Roofing felts, also known as underlayment, are essential materials used beneath roofing shingles or tiles to provide an extra layer of protection against moisture, wind, and other weather conditions. They act as a secondary barrier, preventing water infiltration and enhancing the durability of the roof.
## Types of Roofing Felts
1. Asphalt-Saturated Felt (Tar Paper) – Made from organic or fiberglass mat saturated with asphalt, this traditional underlayment is affordable and water-resistant. It comes in two standard weights: 15# (thinner) and 30# (thicker and more durable).
2. Synthetic Underlayment – Lightweight and tear-resistant, synthetic felts are made from polypropylene or polyester. They offer better slip resistance, UV protection, and longer lifespans compared to asphalt felts.
3. Rubberized Asphalt Felt – A premium option with self-adhesive properties, ideal for high-risk leak areas like valleys and eaves. It provides superior waterproofing and flexibility.
## Benefits of Roofing Felts
– Waterproofing – Prevents water damage to the roof deck.
– Protection During Installation – Shields the roof from rain before shingles are applied.
– Enhanced Durability – Extends the lifespan of the roofing system.
## Choosing the Right Felt
The best roofing felt depends on climate, roof slope, and budget. Synthetic underlayment is ideal for most modern roofs, while rubberized asphalt is best for extreme weather conditions.
Proper installation is crucial—ensure overlaps are sealed and fasteners are secure to maximize effectiveness. Consulting a roofing professional can help determine the best underlayment for your project.
By selecting the right roofing felt, homeowners and builders can ensure a long-lasting, weather-resistant roof.