Tar and gravel roofs are renowned for their durability and resilience, with an average lifespan of 25 years and up to 40 years with exceptional maintenance. However, after 20 years, most tar and gravel roofs start to show signs of age and should be replaced. If you've had your tar and gravel roof for less time and it's already having problems, replacing it sooner is the best option. Tar can be applied to a roof at temperatures as low as 40 degrees Fahrenheit, but it won't dry out or seal properly until the temperature is at least 70 degrees.
It's also important to avoid applying tar when it's very hot, as this can cause it to drip and create a sticky mess. Tar and gravel roofs rarely require intensive maintenance, but if something is wrong, it can usually be noticed quickly. If your roof is structurally sound, you can reinforce it by adding additional layers of fiberglass or foam to increase insulation. Homeowners should always consult with a roofing expert or specialized contractor before starting any roofing project.
It's important to note that applying a tar roof over cracks in a flat roof could be a bandage solution. When applying roofing tar, make sure you have at least a few consecutive days of sunshine without rain or snow so that the tar has time to heal. Tar and gravel roofs are generally made of 3 to 5 laminated layers of sheets based on asphalt, hot tar, and roofing felt. They are also impermeable, which allows them to withstand intense weather conditions such as snowstorms.
In conclusion, tar and gravel roofs are incredibly resilient and durable, with an average lifespan of 25 years and up to 40 years with exceptional maintenance. However, after 20 years they should be replaced as they start to show signs of age. Homeowners should always consult with a roofing expert or specialized contractor before starting any roofing project.