Feb
How to Clean Moss off Tarmac Driveways
- 2022
- admin
Moss growth is one of the most common issues affecting tarmac driveways, especially in damp regions like Dorset, Devon, and Somerset. While tarmac offers durability, affordability, and a smooth finish, its textured surface can trap moisture creating the perfect habitat for moss. If left untreated, moss can make your driveway slippery, unsightly, and even cause gradual surface deterioration.
In this guide, you’ll learn how to clean moss off tarmac driveways safely, which products to use (and avoid), and how to prevent regrowth long-term all while keeping your driveway looking great and functioning at its best.
Why Moss Grows on Tarmac Driveways
Tarmac naturally contains tiny pores and textures. These grooves hold water after rain, making it a prime environment for moss especially if your driveway receives limited sunlight.
Key reasons moss thrives on tarmac driveways:
- Dampness: Water settles easily in the textured surface.
- Shade: Overhanging branches and nearby lawns reduce heat and airflow.
- Organic matter: Dirt and debris provide nutrients for moss growth.
- Surface texture: The small gaps protect moss from friction caused by car tyres.
Understanding these conditions helps you choose the right cleaning and prevention methods.
How to Clean Moss off Tarmac Driveways (Step-by-Step)
Below is a safe and effective method for removing moss without damaging your tarmac driveway.
Step 1: Prepare the Surface
Before applying any cleaning solution:
- Use a stiff brush, broom, or garden rake to remove loose moss.
- Sweep away leaves, mud, and organic buildup.
- Clear drainage channels to prevent standing water.
This step ensures your cleaning agent can penetrate deeper into the tarmac surface.
Step 2: Apply a Safe Moss Treatment
Choosing the right cleaning agent is essential. Some chemicals can weaken the binder in tarmac and cause long-term damage.
Recommended cleaning agents:
- Baking soda (sodium bicarbonate)
- Sodium percarbonate (oxygen-based cleaner)
These eco-friendly options effectively break down moss without harming the tarmac, nearby plants, or soil.
How to apply:
- Wet small sections of your driveway.
- Sprinkle baking soda or dissolve sodium percarbonate in water.
- Scrub with a hard-bristled brush to reach deeper gaps.
- Allow the solution to sit for 20–40 minutes.
During this period, the moss begins to weaken and detach from the surface.
Step 3: Rinse Thoroughly
Once the cleaner has worked its magic:
- Use a garden hose to rinse away loosened moss.
- Avoid high-pressure jet washers, they can strip the binder from tarmac.
- Repeat the process in heavy moss areas if necessary.
Your tarmac driveway should now look cleaner, brighter, and more uniform.
How to Prevent Moss Returning on Tarmac Driveways
Cleaning is only half the solution. Preventing moss from returning keeps your driveway safer and looking its best all year round.
Test Soil pH Around the Driveway
Moss thrives in acidic environments. If your soil pH is below 6, moss is more likely to grow.
Solution:
Apply agricultural lime to increase alkalinity and discourage future growth.
Increase Sun Exposure
Shade is one of the biggest contributors to moss growth.
Consider:
- Trimming trees or hedges
- Thinning branches to allow more light
- Ensuring your driveway receives good airflow
Sunlight naturally dries moisture that moss relies on.
Avoid Over-Watering or Flooding the Driveway
When cleaning or rinsing your tarmac driveway:
- Avoid excessive watering
- Always choose a sunny day
- Let the surface dry completely
A dry driveway is significantly less likely to develop moss.
Regular Maintenance and Sweeping
Simple monthly upkeep can prevent most moss growth:
- Sweep away leaves and debris
- Rinse lightly during dry weather
- Inspect for early moss patches and treat immediately
Staying ahead of the issue saves time and protects the lifespan of your tarmac driveway.
Signs Your Tarmac Driveway Needs Professional Attention
While many homeowners clean moss themselves, there are times when expert help is essential. Consider contacting a professional if you notice:
- Persistent moss returning even after cleaning
- Cracks or loose aggregates
- Uneven surfaces or water pooling
- Ageing tarmac that looks worn or brittle
Professionals like Dares Surfacing can assess whether resurfacing, repairs, or a fresh tarmac layer is needed.
Why Tarmac Driveways Are Worth Maintaining
Properly maintained tarmac driveways can last 15–20 years or more. Benefits of keeping your driveway clean include:
- Improved appearance
- Better traction and safety
- Longer lifespan
- Increased property value
- Reduced risk of costly structural repairs
Regular upkeep prevents small issues like moss from becoming bigger problems.
Professional Tarmac Driveway Services in Dorset, Devon & Somerset
If your tarmac driveway needs more than a simple clean, or you’re considering a brand-new installation, Dares Surfacing provides:
- Professional tarmacing for driveways, paths & car parks
- Resurfacing and repairs
- Drainage improvements
- Long-lasting, cost-effective driveway solutions
Conclusion
Moss growth is a common and frustrating issue for homeowners, but with the right approach, you can safely clean moss off tarmac driveways and prevent it from returning. Regular maintenance, sunlight exposure, gentle cleaning agents, and good surface care all contribute to a healthier, longer-lasting driveway.
If you want expert guidance, professional installation, or durable resurfacing, Dares Surfacing is your trusted specialist across Dorset, Devon, and Somerset.