What Exactly Is Tarmac?
Tarmac is a paving material made from crushed stone mixed with bitumen. It’s applied hot and then rolled to create a solid, weather-resistant surface. Originally adapted from John McAdam’s road-building techniques, tarmac remains a popular surfacing choice for driveways, private roads, and car parks.
Unlike concrete or block paving, tarmac is flexible and less likely to crack under temperature changes or light movement in the ground.
Is Tarmac a Permeable Surface?
Tarmac is non-permeable, meaning it doesn’t allow water to pass through. This makes proper drainage crucial for driveway installations.
If you’re installing a new driveway, you may need to account for surface water runoff to comply with UK planning regulations. Options include:
- Soakaways
- Drainage channels
- Graded driveways
Alternative surfaces such as resin-bound surfacing may be a better option if permeability is a key priority.
Tarmac vs Asphalt: Which One Should You Choose?
Though often confused, tarmac and asphalt are two different materials:
- Tarmac: Uses tar as a binder, slightly rougher finish, better for domestic driveways.
- Asphalt: Uses bitumen with sand, smoother and stronger, ideal for high-traffic roads.
| Feature | Tarmac | Asphalt |
| Binder | Tar | Bitumen |
| Appearance | Rougher texture | Smoother finish |
| Common Uses | Driveways, private roads | Motorways, commercial areas |
If you’re considering a new driveway, our tarmacing specialists can guide you toward the right solution.
What Does It Cost to Tarmac a Driveway?
Tarmacing remains one of the most cost-effective surfacing options in the UK. Pricing depends on the size of the area, location, access, and required preparation.
Estimated Costs:
- £45–£70 per m² (including labour and materials)
- £2,500–£3,500 for an average UK driveway (around 50m²)
- £100–£130 per tonne for material supply
Factors such as drainage work, edging, and base excavation can influence the final cost. For accurate pricing, request a free quote from a local surfacing contractor like Dares Surfacing.
How Long Does Tarmac Take to Dry and Cure?
Drying and curing time varies with weather and site conditions:
- Dry to walk on: 12–24 hours
- Driveable: 48 hours
- Fully cured: Up to 28 days
Avoid placing heavy objects or turning vehicle wheels sharply during the first week to prevent surface damage.
How to Remove Moss from a Tarmac Surface
Moss, algae, and lichen can form on shaded or damp tarmac surfaces. Besides being unsightly, moss can make the surface slippery.
Moss Removal Tips:
- Use a biodegradable moss killer (safe for pets and plants)
- Scrub using a stiff-bristled brush
- Rinse thoroughly with clean water
- Prevent future growth by improving drainage and sunlight exposure
Routine maintenance helps preserve the longevity and appearance of your driveway.
What’s Inside Tarmac?
Tarmac is composed of:
- Bitumen: acts as a sticky binder
- Aggregates: crushed stones or gravel
These ingredients are combined at high temperatures and laid while hot. Compaction locks everything in place, forming a tough, sealed surface.
Who First Created Tarmac?
Although road construction dates back centuries, Edgar Hooley patented tarmac in 1902 after observing how tar reduced dust and improved stability on macadam roads. His innovation revolutionised road building and is still widely used today.
Is Tarmacing Right for Your Project?
Tarmac is a great choice if you want:
- A low-maintenance surface
- Budget-friendly installation
- Quick turnaround
It’s ideal for:
- Driveways
- Private roads
- Farm access
- Forecourts
To see how this surface performs in real-world projects, visit our tarmacing page or get in touch for a personalised quote.
Conclusion
From cost and installation to comparisons with asphalt and moss prevention — understanding tarmacing helps you make an informed decision about your surfacing project.
With professional service, high-quality materials, and expert advice, Dares Surfacing is your go-to partner for long-lasting driveway and tarmac installations.
