Synthetic VS. Felt Roofing Underlayment
Sabrina Pulgar • Jun 28, 2023
Whether you're doing a reroofing project or new home construction, there are many factors to consider about which type of underlayment to use.
When people think of roofs, they usually think about
shingles or
metal roofing. If you’re having trouble deciding which of these is ideal for your roof,
check out our tips to make the right decision. But if you’re deciding on underlayments, keep on reading!
Some may not know what this layer of protection is. Directly on top of the roof deck and under the roof covering, this component has a critical role when protecting your home from moisture damage. It's called roofing underlayment. Here are some specifications about each type of roofing underlayment to consider:
- Synthetic Underlayment: Different synthetic underlayment types have existed since the early 2000s. They are made from high-tech materials such as polypropylene, which is a strong, rigid, crystalline thermoplastic, and polyester or fiberglass, which provide strength and longevity. Synthetic underlayment is typically moisture-resistant, and when installed correctly, it offers better protection from the weather than felt. One way to compare synthetic underlayment is by weight, similar to how felt is compared; instead of pounds-per-100-square-foot, synthetics are rated by grams-per-square-meter (GSM). Also, roofing felt rolls are 3 feet long and cover about 400 square feet, while synthetic underlayment rolls are 4 feet long and cover closer to 1000 square feet.
- Pros:
- Synthetic underlayment is less prone to wrinkling and cracking, making it ideal for areas with high wind exposure.
- It is more resistant to UV rays.
- Some synthetic underlayment gets a little tacky when wet, improving walkability, and this is why many roofing contractors have switched from felt.
- Most synthetic products have a perm rating much less than felt. This means that any moisture in the attic will not escape through the roof, making proper attic ventilation vitally important.
- Cons:
- Synthetic underlayment is more expensive than felt underlayment, which may make it less attractive for homeowners or contractors.
- Some types can be sensitive to high temperatures, and this can cause issues during installation.
- It is made from petroleum-based products, which means it is not biodegradable and contributes to pollution.
- It may not be compatible with all types of roofing materials or systems. It is essential to check with us before making a choice.
- Felt Underlayment: One of the oldest underlayment types is known as asphalt-saturated felt or tar paper. It's made from organic materials like paper fibers and wood that have a cellulose base and are impregnated with asphalt to make them waterproof and durable. Felt roofing underlayment is typically available in No.15 felt, and No. 30 felt. Compared to No. 15, No. 30 is typically thicker, stronger, and less prone to tearing or ripping off during installation or any weather events. Felt is usually fastened with staples, but plastic wind strips may be used along the edges in high-wind areas to prevent tearing.
- Pros
- The main advantage of felt roofing underlayment is that it is generally less expensive than synthetic underlayment, which can be more attractive for homeowners with a tighter budget.
- It is waterproof and prevents water infiltrations, protecting the roof from moisture damage.
- It is easy to cut and shape around protrusions and easy to install.
- It can help to reduce heat loss and improve energy efficiency by providing a small amount of insulation to the roof.
- Felt roofing is made from natural materials, making it biodegradable and more environmentally friendly.
- Cons:
- Felt roofing underlayment can only be exposed for a few hours. The material may dry out or leach oils in the heat, impacting the felt's ability to protect against moisture.
- It is less durable than synthetic underlayment and may need to be replaced earlier, particularly in areas with high winds.
- When exposed to moisture, the mat can absorb water and wrinkle the felt, making it harder for the shingles to lay flat. This can compromise its effectiveness as a barrier against water infiltration.
- It weighs more than synthetic underlayment, making it harder for roofing contractors to drag rolls up a ladder and onto a roof.
- It can degrade over time when exposed to sunlight, leading to cracking.
- It has a slippery surface which can make it more challenging to install.
While felt underlayment is a more traditional, cost-effective, and environment-friendly choice, synthetic underlayment offers superior and long-term performance. Protecting your roof and home from water and moisture infiltration risks is a worthwhile investment. However, the choice will depend on the project, location, budget, and specific needs. Schedule a free inspection here or call our roofing experts to get free-of-charge guidance on the best underlayment material for your project.
Worthmann Roofing & Gutters, recognized for their dedication to quality and customer satisfaction, has expanded its operations with a new office in Ocala, Florida.
Our company brings years of professional experience in roofing services, emphasizing detailed inspections, transparent quotes, and responsive service to meet the needs of the Ocala area.
With this expansion, Worthmann Roofing & Gutters aims to provide outstanding roofing solutions, protecting homes and businesses from the elements and reinforcing their commitment to excellence in the roofing industry.
The new office is located at 2511 NE 3rd St, Ocala, FL 34470, where the team looks forward to serving the community's roofing needs.
Check out this video tour from our COO, Eli Ott.
Our Christmas Party at Worthmann Roofing and Gutters was a success! We had food and drinks for our guests to celebrate a successful year with our team, our President, Drew Worthmann, and our General Manager, Eli Ott. We recognized our top-performing team members, who exemplify the values and vision of our company. Thanks to all who participated!
A sunny paradise located in the southeast of the United States, Florida is the ultimate vacation destination with its subtropical and tropical climate extending from north to south. Considering the white sand beaches, long and warm summer days, and frequent thunderstorms cooling the temperature, the state is aptly branded as the “Sunshine State.” People who are fond of warm days would absolutely love it here.
Metal roofs are more than an extra protective covering for your home or business. They represent an investment in longevity, durability, and efficiency and have become very popular in recent years for a good reason. The appeal of metal roofing goes beyond its sleek aesthetics. It's about understanding the long-term benefits it brings to any structure. Upgrading to a metal roof is making a statement - that you value quality and sustainability over short-lived convenience. You're not alone if you've already recognized the immense potential these roofs hold. But isn't there more to uncover about metal roofs and their potential? Learn everything you must know about metal roofs below.
Roof shingles are crucial to your home's defense against the elements and provide a decorative, sturdy shelter from the weather conditions around your house. Their selection and installation can be daunting for homeowners, but it doesn't have to be. When getting your roof replaced or installed, you must consider many things before you can say which roof shingles are the best choice for you and your house. Some of the factors can be durability, color, material, environmental codes, climate, and the architecture of your building. We understand that choosing roof shingles is not just about practicality; aesthetics also play an essential role. After all, they significantly contribute to your property's curb appeal. This comprehensive guide will delve into everything you need to know about roof shingles, from types, materials, and leading manufacturers to how you should choose them for your home.
As pleasant as the subtropical climate of Gainesville may be, it doesn’t leave the roofs of the houses undamaged. Located in the sunshine state, Gainesville experiences frequent fluctuations in the weather conditions and the houses run the risk of damage by thunderstorms , heavy rainfall, hurricanes , tornadoes , humidity , and even frosts and freezes . Apart from this, the “Tree City” also witnesses cases of fallen trees wreaking havoc on the house roofs quite often. These climatic conditions make it crucial to maintain proper housing conditions, which include roof inspections and servicing.
The following blog post will serve as an introspective guide to understanding Section 179 and navigating its limitations to save the most money on your next commercial roofing project.
The roof over your head protects you and your home from rain, wind, and sun. A well-maintained roof can increase the value of your property and improve its overall appearance. Dive into our illuminating blog post to unveil the myriad advantages of consistent roof maintenance.
You probably don't think about your roof ventilation very often, but it plays an essential role in many aspects of day-to-day life in your home.
Choosing the right material is necessary for a roof that has a longer life , enhances your home's appeal, gives value, is energy-efficient, and, most importantly, fits your budget. No one wants to deal with constant problems and replacements. Understanding each material's pros and cons and knowing how they work in different weather conditions will help you choose the suitable roofing material for your home.
