Tar and Gravel Roof Replacement

The Ultimate Guide to Tar and Gravel Roof Replacement

Introduction to Tar and Gravel Roofs

Tar and gravel roofs, also known as built-up roofs (BUR), have been a reliable choice for flat and low-slope roofing applications for decades. Comprising layers of asphalt or tar paper and finished with a layer of gravel, these roofs are known for their durability and weather resistance. However, like all roofing systems, they eventually require replacement. This guide will walk you through the process of tar and gravel roof replacement, from identifying when it’s time to replace to the actual replacement steps and maintenance tips.

Signs: It’s Time to Replace Your Tar and Gravel Roof

Age of the Roof

Tar and gravel roofs typically last between 20 and 30 years. If your roof is approaching or surpassing this age range, it’s wise to consider replacement. The materials degrade over time, losing their effectiveness at protecting your building.

Persistent Leaks

Frequent or persistent leaks are a clear indicator that your roof may need replacement. While repairs can address isolated leaks, ongoing issues often signal that the roofing material has deteriorated beyond repair.

Blistering and Alligatoring

Blistering occurs when air or moisture gets trapped under the roofing layers, causing bubbles. Alligatoring refers to a cracked pattern resembling an alligator’s skin, which appears when the asphalt loses its elasticity. Both conditions suggest significant wear and may require a roof replacement.

Gravel Displacement

Over time, gravel can shift or erode, leaving the underlying asphalt exposed to UV rays and weather damage. If large areas of gravel are missing, it could be time to replace the roof.

Structural Concerns

If you notice sagging areas, mold growth, or rotting decking, these are severe issues indicating that the roof structure itself might be compromised. Replacement are often necessary to address these underlying problems.

The Replacement Process

Assessing the Existing Roof

Before beginning any replacement project, conduct a thorough inspection of the existing roof. This assessment helps determine the extent of damage and the specific requirements for the new roof. Professional roofing contractors use various tools and techniques to assess the condition accurately.

Choosing Replacement Materials

When replacing a tar and gravel roof, you have several options for new materials. You can stick with the traditional tar and gravel or consider modern alternatives like modified bitumen, single-ply membranes (TPO, EPDM), or built-up roofs with improved materials. Each option offers different benefits in terms of durability, energy efficiency, and cost.

Hiring a Professional Contractor

Replacing a tar and gravel roof is a complex job that requires professional expertise. Choose a reputable roofing contractor with experience in tar and gravel roof replacement. They will ensure the project is completed safely, efficiently, and to high standards.

Removing the Old Roof

The first step in the replacement process is removing the old roofing material. This involves stripping away the gravel and asphalt layers down to the roof deck. The decking is then inspected for damage, and any compromised areas are repaired or replaced.

Installing New Underlayment

A new underlayment is crucial for the longevity of the new roof. This layer provides an additional barrier against moisture and helps ensure a smooth, even surface for the new roofing material. Modern underlayments are often more advanced, offering better protection than older materials.

Applying New Roofing Material

The new roofing material is then applied in layers, similar to the original tar and gravel method. If you opt for tar and gravel again, hot asphalt or tar is applied, followed by layers of roofing felt and more asphalt. The process is repeated to build up multiple layers, creating a durable, weather-resistant surface. Finally, a layer of gravel is spread over the top to protect the asphalt from UV rays and physical damage.

Final Inspection and Cleanup

After the new roof is installed, a thorough inspection ensures that all aspects of the installation meet industry standards and the contractor’s quality guidelines. The job site is then cleaned up, with all debris and old materials properly disposed of.

Maintenance Tips for Your New Tar and Gravel Roof

Regular Inspections

Regular inspections are vital for maintaining the integrity of your new roof. Inspect the roof at least twice a year, preferably in spring and fall and after severe weather events. Look for signs of damage or wear and address any issues promptly.

Cleaning and Debris Removal

Keep the roof clean by removing debris such as leaves, branches, and dirt. Accumulated debris can trap moisture and cause damage. Use a soft broom or a leaf blower to remove debris without harming the gravel layer.

Addressing Small Issues Promptly

Repair small issues, such as minor leaks or gravel displacement, as soon as they are detected. Early intervention can prevent more significant problems and extend the roof’s lifespan.

Professional Maintenance

Consider scheduling professional maintenance at least once a year. Roofing professionals can provide a thorough inspection and address any potential problems that may not be visible to the untrained eye.

Conclusion

Replacing a tar-and-gravel roof is a significant investment that requires careful planning and professional execution. By understanding the signs of roof deterioration and following the recommended replacement process, you can ensure a successful project that protects your property for decades to come. Regular maintenance and timely repairs will further extend the life of your new roof, providing peace of mind and safeguarding your investment.