Tar and gravel roofing has been a popular choice for flat and low-slope commercial buildings for decades. This type of roofing system, often referred to as built-up roofing (BUR), combines multiple layers of roofing felt, hot tar, and gravel, providing a durable and reliable solution for protecting buildings from the elements. In this article, we will explore the components, benefits, installation process, and maintenance of tar and gravel roofing to help you understand why it may be the right choice for your property.
The primary elements of tar and gravel roofing include roofing felt, hot asphalt, and a layer of gravel. Typically, several layers of felt are installed over a flat roof deck, and each layer is saturated with hot asphalt, which acts as a waterproof barrier. The final layer is covered with a thick layer of gravel, which not only protects the underlying materials from UV damage but also provides a robust surface that can withstand environmental stress such as hail storms and high winds. The combination of these materials makes tar and gravel roofing an effective and long-lasting solution for flat roofing needs.
One of the key benefits of tar and gravel roofing is its longevity. With proper installation and maintenance, a tar and gravel roof can last anywhere from 20 to 30 years, or even longer. Additionally, this roofing system offers excellent insulation properties, helping to reduce heating and cooling costs for buildings. Furthermore, the gravel layer can improve the roof’s fire resistance and provide additional protection against foot traffic when maintenance is required.
The installation of tar and gravel roofing involves several steps and should be performed by experienced roofing professionals. The process typically begins with the preparation of the roof surface, which may require repairs or modifications to ensure proper drainage. Following this, multiple layers of roofing felt are installed, each being saturated with hot tar. Once the required number of layers is completed, a thick layer of gravel is spread over the roof surface. This process may take a couple of days, depending on the size of the roof and the weather conditions.
Maintaining a tar and gravel roof is relatively straightforward but crucial for maximizing its lifespan. Regular inspections should be carried out to check for any signs of damage, such as rips or tears in the felt layers. Clearing debris and ensuring proper drainage are also vital to prevent water pooling, which can lead to leaks and other issues. As part of the maintenance routine, it’s advisable to reapply gravel in areas where it may have been displaced to maintain protection and insulation properties.
In conclusion, tar and gravel roofing remains a highly effective and durable solution for flat and low-slope roofs, particularly in commercial settings. Its impressive longevity, excellent insulation properties, and minimal maintenance needs make it a viable choice for building owners. By understanding the components, benefits, installation process, and ongoing maintenance required, you can make informed decisions about whether tar and gravel roofing is the best option for your building’s needs.