Tarmac driveways are a popular choice for homeowners due to their affordability and low maintenance. However, they can be susceptible to melting during heatwaves, which can be a major concern for homeowners. In this article, I will explore the reasons behind tarmac driveway melting, the signs to look out for, and the steps you can take to prevent and address this issue. I will also provide some personal insights and commentary on the topic, as well as some hidden implications and possible future developments.
Why do tarmac driveways melt in summer?
Tarmac driveways are made up of bitumen, which tends to soften in high temperatures. This is because bitumen is a type of asphalt that is sensitive to heat. When temperatures reach around 50°C, the bitumen can become soft and pliable, causing the driveway to melt. This is particularly problematic in the UK, where dark materials absorb heat readily and many driveways sit in direct sunlight. Ground temperatures can be higher than air temperatures, which can cause the tarmac to reach the melting point.
What are the signs of a melting driveway?
The signs of a melting driveway can vary, but some common indicators include soft patches, tire marks, scuffing, indentations, and an uneven or distorted surface. These signs can be a red flag that the tarmac is softening and may need to be addressed. It is important to spot and fix the issue as soon as possible to prevent further damage.
What can you do to prevent a tarmac driveway from melting?
There are several steps you can take to prevent a tarmac driveway from melting. Regular maintenance, such as sealing, can help protect the bitumen from oxidation and UV degradation, which can accelerate softening over time. Proper driveway drainage is also important, as standing water can increase the breakdown of the surface between hot days. Building the driveway with above-standard techniques and using appropriate materials for your driveway and the volume of traffic you expect can also help prevent melting.
What should you do if your tarmac driveway melts?
If your driveway has begun to show signs of softening in the heat, it is important to take a considered approach rather than rushing in to fix the problem. It is best to keep traffic low until the weather cools, as damaged tarmac becomes weaker when heated and can easily cause additional problems. When temperatures decrease, an expert can be brought in to evaluate what needs to be done to fix the area. In some cases, driveway resurfacing may be required, while in others, the sub-base may need to be repaired or rebuilt.
UV-protection
One way to prevent tarmac driveway melting is to use a UV-protection sealer. This sealer works to protect tarmac driveways from UV-rays, which can cause the bitumen to soften. It also helps prevent oil stains and offers protection from frost damage. Using a UV-protection sealer can help restore the 'just-laid' look and extend the lifespan of your tarmac driveway.
Resin driveways and melting
Resin driveways are another popular choice for homeowners, but they are not immune to melting in high temperatures. However, if you have specified a UV-stable resin system, melting should not be an issue. In very hot weather, the surface may become a touch more pliable, meaning minor scuffing could occur when tyres are turned on it. It is important to consider all the options before deciding on a driveway material.
Conclusion
Tarmac driveway melting is a real concern for homeowners, but there are steps you can take to prevent and address this issue. Regular maintenance, proper drainage, and using UV-protection sealers can help extend the lifespan of your tarmac driveway. If you do notice signs of melting, it is important to take a considered approach and seek expert advice to prevent further damage. In my opinion, investing in a high-quality tarmac driveway and taking proactive steps to maintain it can be a smart decision for any homeowner.
