Do you want to mark out your land, secure a car park, or simply fence off an asphalted courtyard? Installing a fence on an asphalt or bitumen surface may seem complex, but it is entirely achievable. Whether you are a private individual or a professional, there are reliable, long-lasting solutions to ensure a solid installation. The key is to choose the right method and the right equipment for your type of fence and the nature of your ground.
Assess the ground before you start
Before you even take out the tools, a crucial step is to assess your asphalted surface. Is the asphalt new and in good condition, or is it old and cracked? The thickness and quality of the asphalt layer are decisive for how well your future fence will hold. Thin or poor-quality bitumen laid on an unstable base will not be able to support the weight and wind load of a tall fence or a pedestrian gate.
If your asphalt is solid and thick (at least 5–7 cm) and sits on a stable base (hardcore, concrete, etc.), you will have more options. Otherwise, you will need to consider reinforcement solutions to ensure the installation lasts.
The simplest solution: base-plate fixing
For most fence projects on asphalt—especially rigid mesh fencing—base-plate fixing is the most common and simplest method. A base plate is a metal base plate, usually square, welded to the bottom of the post. It is drilled with holes so it can be screwed directly to the ground.
This technique is less invasive than core drilling and much quicker to carry out. It is perfectly suited to standard-height fences (up to around 1.8 m) that are not subject to extreme loads. It is the ideal solution for driveways, car parks, or courtyards where you want to avoid major works.
Steps for a successful base-plate installation
Base-plate installation requires precision to ensure perfect alignment and optimum strength. By following these steps, you will maximise your chances of success.
- Marking out: Mark the exact position of each post on the ground using a chalk line and marking paint.
- Drilling: Use a powerful hammer drill with a concrete bit to drill the holes through the asphalt and the base underneath, at the base-plate screw positions.
- Cleaning: Blow out or carefully vacuum the dust from each hole. This is essential to ensure the fixings bond properly.
- Fixing: Insert suitable plugs into the holes, position the base plate, then firmly tighten the coach screws or anchor bolts.
- Installation: Once the base plate is fixed, all that remains is to slot the post into place and continue installing your fence panels.
For maximum strength: core drilling the asphalt
If your fence is particularly tall, heavy (such as a gate), or if the quality of your asphalt is uncertain, core drilling is the preferred solution. This method involves drilling a large-diameter hole (generally between 15 and 25 cm) through the asphalt layer using a core drill.
Once the hole is made, the asphalt “core” is removed and you dig down to create a foundation. The post is then inserted into the hole and set directly in concrete. This technique provides rock-solid strength, because the post is anchored not on the asphalt, but in a proper concrete footing, as with an installation in soil. It is more work, but the durability is unmatched.
Which fixing hardware should you choose?
Choosing the right screws and plugs is essential for a base-plate installation. Do not use simple wood screws or basic plastic plugs. For fixing into asphalt on a solid base, you need robust hardware.
Anchor bolts are an excellent option. Once tightened, they offer very high pull-out resistance. Another highly effective solution is chemical anchoring. This involves injecting a two-part resin into the holes before inserting a threaded rod. Once cured, the fixing is extremely strong and durable.
Which fence for an installation on asphalt?
Fixing on asphalt is particularly well suited to rigid mesh panels. Their structure allows easy base-plate installation and their weight remains reasonable. For heavier fences, such as solid privacy panels that catch a lot of wind, it is essential to assess the strength of the ground and to favour core drilling for the posts. If in doubt, do not hesitate to seek advice from a professional to choose the safest method for your project.
Expert in fencing, gates, and outdoor landscaping since 2019.
Holds a Master’s degree in Digital Marketing – SEO, UX/UI.
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