What is the Difference Between Tarmac and Asphalt?

When it comes to laying driveways, roads and surfaces tarmac and asphalt are at the forefront of materials, but what exactly are the differences and is one better than the other? 

If you’re looking to use one of these materials it’s worth knowing what differences and whether you’re better with one than the other. 

Whilst both of these surfacing materials may look the same when laid, some distinct differences are worth keeping in mind, especially when you’re deciding on which material to use. 

Here we explain exactly what tarmac and asphalt are, as well as the differences between the two. 

What is tarmac? 

Tarmac and tar, both short for tarmacadam, is a substance made from layering crushed stone or aggregate which is then coated and mixed with tar. This mixture is laid and then compacted to get a smooth surface. 

What is asphalt? 

Asphalt is a more modern substance, where tarmac uses tar to bind the aggregate together, asphalt uses bitumen. This bitumen is a semi-solid form of petroleum, a product of the oil industry. Aggregate can include crushed rock, sand or gravel. 

What is asphalt used for? 

Asphalt has many uses, however, it is primarily used for road construction. Here are some of the uses of asphalt: 

Road construction – Widely used to pave roads, driveways, streets and car parks. Asphalt gives a durable and smooth surface as well as being highly resistant to weather and environmental factors. 

Roofing – Asphalt shingles, a waterproofing material, is used in roofing applications. It’s a popular material as it’s affordable, durable and easy to install.  

Waterproofing – Asphalt is used for waterproofing for things like foundations and underground structures, to help protect buildings from moisture damage. 

Road maintenance – Asphalt is used to patch up potholes, fill cracks in road surfaces and resurface pavement that has deteriorated. 

What is the difference between tarmac and asphalt?

Whilst tarmac and asphalt have some similarities, asphalt contains fewer external materials, which makes it slightly harder wearing. 

Here’s a quick overview of the differences between tarmac and asphalt: 

Asphalt has a smoother surface and finish compared with tarmac. This smoother finish increases tyre grip, making it safer and more suited for driveways and roads. 

Tarmac can be damaged by petrol or diesel spills.

Tarmac is not reusable. Asphalt, however, can be scraped off the surface and reprocessed for a different use. 

Asphalt is cheaper when used over a large area, which is why you’ll often find it used on things like road surfaces and pavements. 

Which is cheaper tarmac or asphalt? 

If you’re only covering a small area asphalt can be more expensive than tarmac, however, it is harder wearing. So in the long run, spending more money initially might be more cost-effective. 

Which product is more environmentally friendly? 

Asphalt is more sustainable and environmentally friendly as the product can be reprocessed and used again, whereas tarmac is not reusable. 

What are the benefits of asphalt and tarmac? 

Both tarmac and asphalt are durable and long-lasting. They’re a lot easier to install in comparison to things like block paving too. 

Tarmac or Asphalt – which is best? 

Tarmac and asphalt are both great solutions for surfacing, but if you’re still not sure which is the best option for your project, then get in touch with the Alpha Surfacing team today who can advise on the best option specifically for your wants and needs.