What Is A Tar And Gravel Roof? (4 Benefits)
When it comes to choosing a roof for your commercial property, there are countless options available, each with its own set of benefits and drawbacks. In this guide, we’ll explore the tar and gravel roof—often referred to as a built-up roof (BUR). This option has been around for many years and remains popular for flat or low-slope roofing situations.
Whether you’re considering a new roof installation or looking to replace your existing roof you can make an informed decision, by understanding:
- How tar and gravel roofs work
- Their advantages and disadvantages
- Maintenance requirements
What is a Tar and Gravel Roof?
A tar and gravel roof, or built-up roof (BUR), is a type of roofing system that involves laying down several alternating layers of waterproof material, hot tar, and roofing felt, topped off with a layer of gravel. This roofing solution is particularly prevalent on flat or low-slope roofs due to its durability and protective qualities.
Components of a Tar and Gravel Roof
- Base Layer: The first layer usually consists of insulation or a vapor barrier to protect the building structure from moisture.
- Waterproof Layers: These layers involve alternating sheets of roofing felt and hot asphalt or tar, enhancing waterproofing.
- Surface Layer: A layer of gravel or stone is embedded into the top coat of tar to protect the underlying layers from sun damage and wind-blown debris.
How Tar and Gravel Roofs are Installed
Installation of a tar and gravel roof requires skilled professionals and involves several key steps:
- Preparation: The roof surface is cleaned and any repairs to the underlying structure are made.
- Base Layer Application: The base layer or vapor barrier is applied.
- Layering Process: Multiple layers of roofing felt and hot tar or asphalt are alternated until the desired thickness is achieved.
- Top Coat: A final layer of asphalt or tar is applied.
- Gravel Layer: Pea-sized gravel is evenly spread over the top layer to create a protective surface.
⭐️ 4 Benefits of Tar and Gravel Roofs
For many homeowners, tar and gravel roofs offer a host of advantages:
1) Durability and Longevity
Tar and gravel roofs are renowned for their durability. With proper installation and maintenance, they can last upwards of 20 to 30 years. The multiple layers provide excellent protection against the elements, making them a reliable choice for harsh weather conditions.
2) Cost-Effectiveness
One of the most appealing aspects of tar and gravel roofs is their cost-effectiveness. While the initial installation might be more expensive than some other types of roofs, the longevity and low maintenance costs make it a wise investment over time.
3) Excellent UV Protection
The gravel on top of the roof provides a substantial shield against UV rays, which can cause damage to other roofing materials. This protective layer helps extend the life of the roof and minimizes heat absorption, which can benefit energy efficiency.
4) Flexibility in Appearance
Homeowners have the option to choose from different gravel colors to match the aesthetic of their property, providing a customizable element to their roof.
❌ Disadvantages of Tar and Gravel Roofs
Despite the many benefits, there are also some potential drawbacks homeowners should consider:
Heavy Weight
The multiple layers of materials used in a tar and gravel roof can add significant weight to a building’s structure. It’s crucial to ensure that the building can support this added weight to avoid structural issues.
Complexity of Installation
Installing a tar and gravel roof is a complex process that should only be undertaken by skilled professionals. It requires specialized knowledge and equipment, which can make the initial installation process challenging and costly.
Maintenance Challenges
While these roofs are generally low maintenance, when issues do arise, they can be hard to detect. Leaks, for example, can be difficult to locate and repair without professional assistance.
Not Suitable for High-Slope Roofs
Tar and gravel roofs are ideal for flat or low-slope roofs but are not suitable for high-slope applications. The gravel can shift or fall off, reducing its efficacy.
Maintenance Tips for Tar and Gravel Roofs
Proper maintenance is key to extending the lifespan of a tar and gravel roof. Here are some tips to keep your roof in optimal condition:
- Regular Inspections: Conduct bi-annual inspections and after major weather events to check for signs of wear or damage. Look for loose gravel, cracks in the tar, and areas where water may be pooling.
- Debris Removal: Keep your roof clear of debris such as leaves, branches, and dirt. These can trap moisture and lead to roof deterioration over time.
- Address Ponding Water: Flat roofs are prone to water pooling, which can cause leaks if not addressed. Ensure effective drainage systems are in place and functioning properly.
- Professional Repairs: At the first sign of damage or leaks, contact a professional roofer to assess and repair the roof. Early intervention can prevent more significant and costly problems down the line.
Environmental Considerations
One consideration for environmentally-conscious homeowners is that traditional tar and gravel roofs involve the use of petroleum-based products. However, some modern alternatives use more eco-friendly materials, providing similar benefits with a reduced environmental impact.
Discover If A Gravel Roofing System Is Right For You
Tar and gravel roofs remain a popular choice for flat and low-slope residential roofing due to their durability, cost-effectiveness, and UV protection. While there are some challenges associated with their weight and installation, the benefits often outweigh the drawbacks for many homeowners.
If you’re considering a tar and gravel roof for your home, it’s essential to consult with a professional roofing contractor who can assess your specific situation and guide you through the installation process. Remember, proper maintenance is crucial to ensure your roof lasts well beyond its expected lifespan, providing you with peace of mind and protection for years to come.For personalized advice or to schedule a consultation, reach out to Built Right Roofing, who can help determine the best roofing solution for your home’s unique needs.
