What Is Tar And Gravel Roof? (Maintenance, Repairs & More)

Managing a property means making informed decisions about the materials and structures that protect it. One such essential aspect is the roof—a building’s first line of defense against the elements. Among the many roofing options available, tar and gravel roofs have been a reliable choice for decades, especially for flat or low-sloped commercial and residential buildings. But what exactly are tar and gravel roofs, and what do building managers need to know about them to make confident decisions?

This guide will explore the key aspects of a tar and gravel roof:

• How they work
• Their benefits
• Potential drawbacks
• Essential maintenance tips

For building managers looking to ensure the longevity of their properties, understanding this classic roofing system is invaluable.

What Is a Tar and Gravel Roof?

A tar and gravel roof, often referred to as a Built-Up Roof (BUR), is a popular type of flat roofing system that has been used for over a century. It is composed of alternating layers of asphalt (or tar) and roofing felt that are bonded together. This layering process creates a durable membrane designed to protect the structure beneath. The topmost layer is then covered with gravel or crushed stone to shield the underlying layers from UV rays, increase durability, and provide a finished look.

Important Components of a Tar and Gravel Roof:

• Base Layers: Made of fiberglass or organic felt, these layers are coated with hot asphalt or tar to create a waterproof barrier.
• Reinforced Layers: Typically, multiple layers of felt and asphalt are built up to add strength and insulation to the roof.
• Gravel Topcoat: A final layer of small stones or gravel is embedded in the asphalt to protect against UV degradation and to provide a fire-resistant surface.

This roofing system is best suited for flat or low-sloped roofs, as its design ensures excellent water resistance and durability over time.

Why Are Tar and Gravel Roofs Popular

Tar and gravel roofs have stood the test of time for a reason. Their robustness and ability to perform in various climates make them an appealing choice for building managers.

⭐️ Benefits of Tar and Gravel Roofs:

• Durability: With proper installation and maintenance, tar and gravel roofs can last 20-30 years or more. Their multi-layered design offers excellent resistance to wear and tear, even in harsh weather.
• Cost-Effective: Compared to more modern roofing options, tar and gravel systems are relatively affordable to install and maintain, making them ideal for budget-conscious building managers.
• Energy Efficiency: Gravel reflects sunlight, keeping interiors cooler in summer. Additionally, the multiple layers of asphalt and felt provide insulation, reducing heating costs in winter.
• Strong Waterproofing: Multiple layers of material create a highly waterproof barrier, protecting the property from leaks and water damage.
• Low Maintenance: While regular inspections are necessary (as with any roofing system), tar and gravel roofs are generally low maintenance and require less frequent repairs than some alternatives.
• Fire Resistance: The gravel top layer acts as a fire retardant, adding a layer of safety for commercial buildings.

🚫 Potential Drawbacks of Tar and Gravel Roofs

While tar and gravel roofs are an excellent choice for many buildings, it’s important to consider some of their limitations before deciding.

• Weight: Tar and gravel roofs are heavy, and not all structures are designed to support the additional weight. Building managers should consult with structural engineers before installation.
• Drainage Issues:Flat roofs are notorious for ponding water, and tar and gravel roofs are no exception. Poorly designed or clogged drains can compromise the roof’s effectiveness.
• Limited Visibility for Inspecting Damage: The gravel top layer can make it difficult to detect damage, cracks, or leaks beneath the surface. Regular inspections by roofing professionals are crucial.
• Messy Installation Process: The installation process involves hot asphalt, which can produce strong odors and mess. Temporary accommodations may be necessary for tenants or staff.
• Susceptible to Gravel Displacement: Over time, wind and foot traffic can displace the gravel layer, exposing the underlying materials to UV damage and wear. This can be mitigated by reapplying gravel periodically.
• Shorter Lifespan Compared to Modern Alternatives: While tar and gravel roofs are durable, newer roofing systems like modified bitumen or single-ply membranes may offer slightly longer lifespans with comparable or better performance.

Building managers must weigh these potential challenges against their specific needs and budget to determine if a tar and gravel roof is the right fit.

Maintenance Tips for Building Managers

Regular maintenance is crucial to maximizing the lifespan of your tar and gravel roof. Here are some actionable maintenance tips for building managers:

1) Perform Regular Inspections:

Schedule biannual inspections, ideally in spring and fall, to check for any damage, leaks, or gravel displacement.

2) Clear Debris:

Remove leaves, branches, and other debris that can clog drains and cause water to pool on the roof.

3) Reapply Gravel:

Over time, some gravel may become loose or dislodged. Reapplying fresh gravel ensures the roof remains protected from UV rays and wear.

4) Check for Ponding Water:

Address any areas where water is pooling to prevent potential leaks or structural damage. Adjusting the slope or adding more drains may help mitigate this issue.

5) Seal Any Cracks:

Inspect the felt and asphalt layers for cracks or openings, and have them sealed promptly to protect the roof’s waterproof barrier.

6) Limit Foot Traffic:

While tar and gravel roofs are sturdy, excessive foot traffic can displace gravel and cause wear. Use designated walk pads to prevent damage.

7) Invest in Professional Repairs:

When repairs are needed, always work with a qualified roofing professional to ensure the integrity of the roof is maintained.

Alternatives to Tar and Gravel Roofs

While tar and gravel roofs are reliable, some building managers may consider alternative roofing systems based on their unique needs. Here are a few modern options to compare:

1. Modified Bitumen: A more modernized take on BUR systems, modified bitumen offers enhanced flexibility, longevity, and UV resistance.
2. EPDM (Rubber Roofs): Lightweight and highly durable, EPDM is a popular single-ply roofing solution for flat roofs.
3. TPO (Thermoplastic Polyolefin): Known for its energy efficiency and affordability, TPO is ideal for commercial properties seeking heat-reflective roofing materials.
4. PVC Roofing: PVC roofs are excellent for areas with chemical exposure or extreme weather, making them a robust and durable option.

Consult a roofing expert to assess which system is best suited to your building’s structural requirements and budget.

Why Choose Whitt’s Quality Roofing for Your Tar and Gravel Roof?

At Whitt’s Quality Roofing, we understand that the roof is one of the most critical components of any building. Our team has decades of experience in installing and maintaining tar and gravel roofs, ensuring your commercial property remains protected and functional.

With Whitt’s, You’ll Get:

• Expert Installation:
• Our team is trained in the latest roofing techniques to provide a seamless installation that stands up to the test of time.
• Comprehensive Maintenance Plans:
• We offer tailored maintenance schedules to keep your roof in top condition year-round.
• Trusted Advice:
• Not sure if a tar and gravel roof is right for you? We’ll guide you through your options, providing honest and transparent recommendations based on your needs.

For building managers, understanding the ins and outs of tar and gravel roofs is essential to making informed decisions. With their proven durability, cost-effectiveness, and fire resistance, they remain a solid choice for flat or low-sloped roofing. However, proper maintenance and periodic professional inspections are needed to maximize their lifespan and performance.

If you’re considering a tar and gravel roof for your property or need help maintaining an existing one, trust the experts at Whitt’s Quality Roofing. Contact us today to schedule a consultation, and ensure your property has the protection it deserves.