Roofing is an essential part of construction, ensuring homes and buildings are shielded from the elements. Materials like roofing felt and tar paper play a pivotal role in this protection. The difference between roofing felt and tar paper might seem subtle, but they have distinct compositions and applications that cater to varying construction needs. Both materials have their own set of advantages and serve unique functions in the world of roofing.
Roofing Felt: An Overview
Composition and Materials
Roofing felt, often referred to as felt paper, is primarily made from organic materials or fiberglass. When combined with asphalt, it offers additional protection, especially against water.
Common Uses in Construction
Traditionally, roofing felt serves as an underlayment, a layer sandwiched between the roof deck and the outer roofing materials. This added layer provides:
- A water-resistant barrier
- Additional insulation
- A smoother surface for the application of shingles
Advantages and Benefits
- Durability: When installed correctly, roofing felt adds years to the lifespan of a roof.
- Water Resistance: Its primary function is to act as a barrier against water infiltration, preventing leaks.
- Versatility: Suitable for various roofing types, including asphalt, wood, and slate.
Tar Paper: An Overview
What is Tar Paper?
Tar paper, sometimes known as “roofing tar paper” or “building paper,” is a heavy-duty paper material that’s been saturated with tar. Its primary function is to serve as a moisture barrier, protecting homes and buildings from potential water damage. The dark coloration typical of tar paper is a direct result of the tar impregnation, which imbues the paper with its water-resistant qualities.
Key Components
At its core, tar paper is a simple product, but it’s designed to address some of the most pressing concerns in construction:
- Paper: It begins as a heavyweight paper, ensuring durability and flexibility.
- Tar: The paper is then soaked in tar, which provides its signature water-resistance and lends it a distinct dark hue. The tar also offers an added layer of protection against pests and minor fires.
Primary Applications
While tar paper has seen competition from modern synthetic underlayments, its place in the history of construction is undeniable. Here’s a more detailed look at its uses:
- Historical Use: Before the advent of synthetic materials, tar paper was the gold standard for roofing underlayment. Many older buildings still boast their original tar paper underlayment, a testament to its durability.
- Modern Adaptations: While its dominance has waned, tar paper is still utilized, especially in projects where budget constraints are a concern. It’s a versatile material and can be applied to various surfaces, from roofs to walls, ensuring a moisture-free environment.
Benefits of Using Tar Paper
Though sometimes overshadowed by newer materials, tar paper’s benefits are significant:
- Moisture Barrier: Its primary function remains its most crucial. Tar paper effectively prevents water infiltration, ensuring a dry interior and minimizing the risks of mold and structural damage.
- Cost-effectiveness: One of the primary reasons for its continued use is its cost. Tar paper remains a budget-friendly option, especially when compared to certain synthetic underlayments.
- Ease of Application: Installers often appreciate tar paper for its straightforward application. It doesn’t require specialized tools, and its flexibility allows it to conform to a variety of shapes and surfaces.
- Protection Against Pests: The tar in the paper serves as a deterrent to certain pests, offering an added layer of protection to the structure.
- UV Protection: When exposed to sunlight for a short duration during construction, tar paper can protect the underlying structure from harmful UV rays.
Comparing Roofing Felt and Tar Paper
Material Differences
At a glance, roofing felt and tar paper might appear similar. But when broken down, their differences become evident:
- Base Materials: Roofing felt might integrate fiberglass or organic materials. These materials can offer added strength and resilience, particularly when combined with asphalt. In contrast, tar paper’s primary component is paper.
- Surface Finish: Roofing felt tends to present a smoother finish, sometimes even with a slightly granular texture due to the materials used. Tar paper, with its tar saturation, can feel more sticky and gritty.
Performance Factors
Both roofing felt and tar paper are designed for performance. However, there are areas where one might outshine the other:
- Lifespan: Roofing felt typically lasts longer due to its enhanced resistance to wear and tear.
- Resistance to Elements: Both materials offer water resistance, but roofing felt tends to be more resilient against extreme weather.
- Installation Process: While both materials are relatively easy to install, tar paper is often quicker to lay down due to its flexibility.
Cost Implications
- Upfront Costs: Tar paper is generally more affordable initially.
- Long-term Maintenance: However, the durability of roofing felt might mean fewer replacement costs in the long run.
Factors to Consider in Selection
When choosing between roofing felt and tar paper, consider:
- Climate and Weather Conditions: If your area experiences heavy rainfall, roofing felt might be the better choice.
- Roof Type and Slope: Tar paper is often more adaptable to roofs with unique slopes or shapes.
- Budget Constraints: If on a tight budget, tar paper is generally more cost-effective.
- Longevity and Durability: For long-term solutions, roofing felt tends to outlast tar paper.
Frequently Asked Questions
Is roofing felt the same as tar paper?
No, while both serve as underlayments, roofing felt typically contains fiberglass or organic materials and asphalt, while tar paper is primarily paper saturated with tar.
Which one is more environmentally friendly?
Roofing felt, especially if made from organic materials, is usually considered more sustainable than tar paper.
Can I use both on my roof?
It’s generally not recommended to layer both. It’s best to choose one based on your specific needs and conditions.
Conclusion
Both roofing felt and tar paper have carved niches in the construction world, offering unique advantages. It’s crucial to assess individual needs, budget, and local conditions before choosing the best material for the job. With the right choice, you can ensure the longevity and durability of your roof, providing peace of mind for years to come.