Felt for Shed Roof

Choosing the Right Felt for Shed Roofs: A Comprehensive Guide

When constructing or repairing a shed roof, selecting the proper roofing felt is crucial to ensure durability and protection against weather elements. Felt for shed roofs serves as a weather-resistant barrier that protects the shed from moisture and enhances the longevity of the roofing materials. This guide explores the types of roofing felt suitable for sheds, their benefits, installation tips, and maintenance advice to help American homeowners and DIY enthusiasts make informed decisions.

What Is Roofing Felt and Why Is It Important For Shed Roofs?

Roofing felt, often referred to as tar paper, is a layer of protective material installed between the shed’s roof deck and the outer roofing covering such as metal panels, asphalt shingles, or tiles. Its primary purpose is to provide a waterproof barrier that prevents water infiltration, which can cause wood rot, mold, and structural damage.

For shed roofs, which are frequently exposed to harsh weather conditions, using a quality felt ensures water resistance, durability, and added insulation. It also offers an extra safety margin during heavy rains or snow, reducing the risk of leaks.

Types of Felt Used for Shed Roofs

Asphalt-Saturated Felt

This traditional felt is made from organic (wood cellulose fibers) or fiberglass mat saturated with asphalt, offering decent waterproofing. The common weights are 15-pound and 30-pound felts, with the 30-pound being thicker and more durable. It is affordable and easy to find, making it popular for many shed roofing projects.

Synthetic Felt

Made from polypropylene or polyester, synthetic felt is lighter, more tear-resistant, and does not absorb water like asphalt-saturated felt. Its increased durability and resistance to UV exposure make it ideal for shed owners seeking longer-lasting protection. Synthetic felt also provides better slip resistance for safe roof walking during installation.

Rubberized Asphalt Felt

This specialty felt is coated with rubberized asphalt, creating an almost impermeable membrane. It is best used in areas requiring exceptional waterproofing such as roof valleys, edges, and around skylights or chimneys. While more expensive, it provides superior protection from leaks.

Factors to Consider When Choosing Felt for a Shed Roof

• Climate Conditions: In wet or snowy regions, thicker synthetic or rubberized felt provides better protection against moisture.
• Shed Roof Slope: Steeper slopes often benefit from lighter synthetic felts due to ease of handling, while low-sloped roofs may require heavier, more durable felt.
• Budget: Asphalt felt tends to be more economical, but synthetic felt’s longer lifespan can justify the upfront cost.
• Installation Ease: Synthetic felts are generally lighter and easier to install, especially for DIYers.
• Roofing Material Compatibility: Ensure the felt type is compatible with your chosen roofing material to optimize performance.

Installation Tips for Felt on Shed Roofs

Proper installation is key to maximizing the effectiveness of roofing felt on shed roofs. Follow these essential practices:

1. Prepare the Roof Deck: Ensure the sheathing is clean, dry, and in good repair before laying the felt.
2. Start from the Bottom: Begin installing felt at the eaves and work upwards, overlapping each layer by at least 2 to 4 inches.
3. Secure Properly: Use roofing nails or staples spaced per manufacturer recommendations to prevent wrinkling or flapping.
4. Seal Edges: Pay special attention to edges and penetrations, applying additional felt or sealant to prevent water entry.
5. Allow Overhang: Extend felt at least 2 inches beyond the roof edge for adequate runoff protection.
6. Avoid Walking on Freshly Installed Felt: Wait until it is fully secured to prevent tearing.

Maintenance and Longevity of Shed Roof Felt

Routine maintenance can extend the life of a shed’s roofing felt and protect the entire structure:

• Inspect Annually: Look for tears, wrinkles, or exposed areas after storms or seasonal changes.
• Clear Debris: Remove leaves, branches, and dirt from the roof and gutters to prevent water accumulation.
• Spot Repairs: Patch any damaged felt immediately with compatible roofing tape or additional felt layers.
• Check Roof Covering: Ensure shingles, metal panels, or tiles remain intact to protect the felt underneath.

With proper installation and maintenance, roofing felt on shed roofs can last from 10 to 30 years depending on the material chosen, helping protect the shed from costly repairs due to water damage.

Comparing Synthetic Felt and Traditional Asphalt Felt for Sheds

Environmental Impact and Sustainability

Many modern synthetic roofing felts are designed with sustainability in mind. They often require less frequent replacement, reducing waste. Some manufacturers also use recycled materials and low-VOC (volatile organic compounds) formulations, making synthetic felt an environmentally friendlier choice compared to traditional asphalt-saturated felt.

For shed builders focused on eco-conscious construction, selecting low-impact roofing felts can contribute to greener building practices.

Where to Buy Roofing Felt for Shed Roofs

Roofing felt is widely available at home improvement stores like Home Depot, Lowe’s, and local building supply centers. Online retailers also offer various types and brands for convenient shipping. When purchasing, check product specifications to ensure the felt suits the regional climate and your shed’s roofing material.

• Consider bulk purchases for larger sheds or multiple projects.
• Look for manufacturer warranties and certifications.
• Compare prices and reviews to find the best balance between cost and quality.