The Ultimate Guide to Tar for Roofing: 1 Minute to Learn Everything About Tar Roofing Solutions

Choosing the right roofing material is crucial for both the durability and energy efficiency of any building. Tar, especially in the form of built-up roofing (BUR), has stood the test of time as a traditional roofing solution for flat and low-slope roofs. In this ultimate guide to tar for roofing, we’ll explore what tar roofing is, its benefits and drawbacks, how it’s applied, and important considerations to help you decide if it’s the right option for your project.

What is Tar for Roofing?

Roofing tar is a black, viscous, petroleum-based product used in combination with layers of roofing felt or fiberglass fabric to create a waterproof seal on flat or nearly flat roofs. The classic built-up roofing system utilizes alternating layers of tar (or asphalt) and reinforcing fabrics, finished with a protective coating such as gravel. This method creates a durable, weather-resistant barrier that can last for decades when properly maintained.

Benefits of Tar Roofing:

1. Waterproofing: Tar forms an impervious seal, protecting your structure from leaks and moisture intrusion.
2. Durability: Layered BUR systems can last 20-30 years or more with regular maintenance.
3. UV Protection: The gravel or mineral top layer shields the roof from sunlight and harsh weather.
4. Cost-Effective: Compared to some modern flat roofing systems, tar roofing remains relatively affordable.
5. Proven Track Record: Tar has been used successfully for over a century in both commercial and residential construction.

Drawbacks of Tar Roofing:

1. Odor and Fumes: Hot tar installation produces strong fumes, which can be unpleasant or hazardous if not managed properly.
2. Weight: BUR systems are heavier than some alternatives and may require additional structural support.
3. Installation Complexity: Installation is labor-intensive and best performed by skilled professionals.
4. Maintenance: Regular inspections and maintenance are necessary, especially after severe weather.

Types of Roofing Tar:

1. Coal Tar Pitch: Traditionally used for its superior water resistance and chemical durability. Best for flat roofs with little to no slope.
2. Asphalt (Bitumen): More commonly used today due to availability, affordability, and performance for low-slope roofs.
3. Cold-applied Tar: Newer products allow for safer, less odorous application without heating.

Application Process:

1. Preparation: The roof surface must be clean and dry before application. Old materials are removed as necessary.
2. Layering: Alternating layers of tar and reinforcing fabric are applied. Typically, at least three layers are used for optimal durability.
3. Surfacing: A final gravel or mineral coating protects the tar from UV damage and mechanical wear.

As a designer, a major consideration I always have is how the practical functionalities of a roof mesh with a building's overall aesthetic and usage requirements. For those undertaking remodels or creating plans for new builds, utilizing advanced planning tools can make a significant difference. With tools like a 3D floor planner, you can visualize how a tar roofing system integrates with the rest of your design—ensuring both utility and style are optimized from the early stages of your project.

Tips 1:

When considering tar roofing, always factor in local climate. Tar performs exceptionally in moderate climates but may struggle with extreme heat or cold. In such regions, regular inspection for cracks or blisters is important. Also, consult with a roofing professional familiar with BUR systems to ensure correct installation and long-term performance.

FAQ

Q: What is the lifespan of a tar roof?

A: With proper installation and maintenance, a tar roof can last from 20 to over 30 years.

Q: Can I install a tar roof myself?

A: Due to the complexities and safety considerations (especially with hot tar), professional installation is highly recommended.

Q: Is tar roofing environmentally friendly?

A: Traditional tar is petroleum-based, but some newer formulations and application methods are being developed to reduce environmental impact.

Q: How often should tar roofs be maintained?

A: It’s best to inspect your tar roof twice a year and after severe storms to spot and repair any damage early.

Q: Can tar be used for pitched roofs?

A: Tar roofing is best suited for flat or low-slope roofs. For steeper pitches, consider alternative materials such as shingles or metal roofing.