Installing a road sign correctly is just as important as choosing the right one. Even the clearest sign can be difficult to spot from a distance if it’s mounted too low, positioned in the wrong location, or installed incorrectly, meaning important information may go unnoticed.
Whether you’re installing a road sign, safety notice, or commercial signage, correct installation can help to ensure that information remains visible, secure, and easy to understand. A well-positioned sign gives drivers, cyclists, and pedestrians enough time to recognise and react to important instructions, warnings, or directions.
In this guide, we’ll explain the key differences between wall-mounted and post-mounted signs, the tools you’ll need, how to install each type step by step, and the key factors to consider when choosing the best location to maximise visibility and safety.
Post-Mounted or Wall-Mounted Signs?
Before you begin, it’s important to choose the right mounting method for your sign. While both options achieve the same goal, they’re designed for different environments.
Post-mounted signs are ideal for open areas where there isn’t an existing structure to attach a sign to. They’re commonly used along roadsides, in car parks, on industrial estates, and in rural areas. Because the post can be positioned almost anywhere, they offer greater flexibility and can be installed where they’ll be most visible to approaching road users.
Wall-mounted signs are attached directly to a solid wall, fence, or building. They’re often used on commercial sites, warehouses, schools, and private property where suitable wall space is readily available. This removes the need to install a separate signpost while still providing clear, secure signage.
The installation process depends on the type of sign you choose. Post-mounted signs require the post to be securely fitted into the ground, while wall-mounted signs are attached directly to a solid surface using suitable fixings. The sections below explain how to install each type correctly.
| Comparison | Post-Mounted | Wall-Mounted |
| Best for | Roadsides, car parks, open areas | Buildings, fences, walls |
| Installation | Fixed to a post and fitted into the ground | Fixed directly to a solid surface |
| Flexibility | High | Depends on the wall space available |
| Typical locations | Public roads, industrial estates, rural roads | Warehouses, schools, commercial premises |
Wall-Mounted Signs
Wall-mounted signs are a practical solution when there’s already a suitable wall, fence, or building available. They’re commonly used on commercial properties, warehouses, schools, private roads, and car parks, providing a secure and professional way to display important information without the need for a separate signpost.
Before installing a wall-mounted sign, make sure it’s the correct size for its location and intended viewing distance. A sign that’s too small may be difficult to read, while one that’s too large can look out of place or obscure other information. If the sign is intended for drivers, it should be large enough to be recognised and read well before they reach it, especially on high-speed roads.
Tools You’ll Need to Install a Wall-Mounted Sign
Before you begin, make sure that you have the following equipment ready:
- Wall-mounted sign
- Suitable wall fixings
- Corrosion-resistant screws or masonry fixings
- Spirit level
- Measuring tape
- Electric drill
- Metal drill bit (if the sign isn’t pre-drilled)
- Wall plugs or anchor bolts (for heavier signs)
- Pencil or marker
For your safety, it’s recommended to wear protective gloves and safety goggles. If you’re working near live traffic, construction sites, or busy car parks, high-visibility clothing should also be worn.
How to Install a Wall-Mounted Sign
Before beginning, make sure the sign can be clearly seen from the intended viewing direction and won’t create an obstruction for pedestrians. For roadside traffic signs, the bottom edge of the sign should typically be mounted at least 2.15 metres above ground level, increasing to 2.4 metres where cyclists are likely to pass underneath.
1. Choose the Mounting Position
Hold the sign against the wall and check that it’s clearly visible to approaching road users or pedestrians. Ask someone to hold the sign in position if possible. Then use a spirit level to ensure it’s straight before marking the fixing points with a pencil or marker.
2. Drill the Sign (If Required)
If the sign isn’t already pre-drilled, apply masking tape over each drilling point to help protect the sign face. Carefully drill the fixing holes using a suitable metal drill bit.
3. Drill the Wall
Using the marked fixing points as a guide, drill the wall with a suitable masonry drill bit. Insert the correct wall plugs or anchor bolts, depending on the wall type and the weight of the sign.
Tip: Before drilling into any wall, check for hidden electrical cables, water pipes, or other services using a suitable detector. This can help prevent costly damage and improve safety during installation.
4. Secure the Sign
Position the sign against the wall, align the fixing holes, and secure it using corrosion-resistant screws or suitable wall fixings. Tighten each fixing evenly to ensure the sign is firmly attached.
5. Carry Out Final Checks
Once installed, check that the sign is level, securely fixed, and clearly visible from the intended viewing direction. Make sure it’s not obstructed by parked vehicles, trees, bushes, or other nearby objects that could reduce visibility.
Post-Mounted Signs
Post-mounted signs are the most common road sign installation in the UK. You’ll see them along roadsides, in car parks, on industrial estates, on private roads, and in other open areas. They’re ideal where there’s no suitable wall or building to mount a sign.
Because the sign is supported by its own post, the installation must be stable enough to withstand wind, changing weather conditions, and everyday use. Installing the post at the correct depth and using the right fixings will help ensure the sign remains secure, visible, and effective for years to come.
How Deep Should a Sign Post Be Buried?
As a general rule, at least one-third of a sign post’s total length should be buried below ground level. This provides the stability needed to keep the post upright and resistant to strong winds and everyday wear.
For example:
| Post Length | Minimum Burial Depth |
| 1.8m (6ft) | 0.6m (2ft) |
| 2.7m (9ft) | 0.9m (3ft) |
| 3.6m (12ft) | 1.2m (4ft) |
The exact depth may vary depending on the size and weight of the sign, ground conditions, and how exposed the site is to strong winds. Larger signs or installations in softer ground may require deeper foundations for additional stability.
For permanent installations, it’s recommended to secure the post using concrete or other suitable post-setting compounds such as Postfix.
Tools You’ll Need to Install a Post-Mounted Sign
Before installing a post-mounted sign, make sure you have the correct tools and materials ready. Having everything prepared beforehand will help make the installation quicker, safer, and help ensure the post is installed correctly.
For most installations, you’ll need:
- Sign post
- Sign
- Post cap
- Base plate (if required)
- Sign fixings and brackets
- Post hole digger or spade
- Concrete or Postfix
- Spirit level
- Measuring tape
- Spanner or socket set
If you’re installing multiple posts or working in particularly hard ground, powered excavation equipment may also be useful.
For safety, always wear appropriate PPE, including protective gloves and safety footwear. If you’re working near live roads, busy car parks, or construction sites, high-vis clothing should also be worn.
How to Install a Post-Mounted Sign
1. Mark the Installation Location
Choose a location where the sign will be clearly visible to approaching road users and pedestrians. Before digging, check for any underground utilities or services that could be affected.
2. Dig the Hole
Dig a hole that’s approximately 1/3 of the total post length. The hole should be wide enough to allow the post to be positioned securely while allowing enough space for concrete or Postfix around the base.
3. Fit the Base Plate (If Required)
If you’re using a ground-fixed base plate, attach it securely to the bottom of the sign post using the recommended fixings. This will help provide additional stability once the post is installed.
4. Position the Post
Place the post into the hole and use a spirit level to make sure it’s perfectly upright. If required, fit anti-rotational clips before securing the post to help prevent movement over time.
5. Secure the Post
Fill the hole with concrete or a suitable post-setting compound, ensuring it surrounds the base of the post. Continue checking the post with a spirit level until the concrete begins to set.
Top Tip: Before the concrete or Postfix fully sets, stand several metres back and check the sign from the direction drivers or pedestrians will approach. It’s much easier to adjust the alignment at this stage than after the foundations have hardened.
6. Attach the Sign
Position the sign at the correct height and attach it to the post using the appropriate sign brackets and channel fixings. Tighten all fixings evenly using a suitable spanner or socket set.
7. Fit the Post Cap
Install a post cap on top of the sign post to help prevent water build-up inside the post, helping to increase the durability of the post and provide a clean, finished appearance.
8. Carry Out Final Checks
Once the installation is complete, check that the post is secure, the sign is level, and all fixings are fully tightened. Finally, make sure the sign can be clearly seen by approaching road users and isn’t obstructed by vegetation, parked vehicles, or other nearby objects.
Choosing the Best Location for Your Sign
Correct installation isn’t just about how a sign is mounted. Choosing the right location is equally important. Even a securely installed sign can be ineffective if it’s difficult to see, read, or understand in time.
When deciding where to install a sign, consider the following factors:
Visibility
The sign should be clearly visible from the direction people will approach. Avoid positioning it behind parked vehicles, trees, bushes, fences, street furniture, or any other obstacles that could block the view.
Viewing Distance
Drivers, cyclists, and pedestrians need enough time to spot, read, and react to the information on a sign. On faster roads, signs need to be larger and positioned further away from hazards or junctions to allow enough reaction time.
Mounting Height
Mount the sign at an appropriate height for its location. Signs installed too low can become hidden by parked vehicles or pedestrians, while signs mounted too high may be difficult to read. Where signs are installed beside footpaths, make sure there’s enough clearance for pedestrians and cyclists to pass safely underneath.
Lighting
If the sign needs to be visible after dark, consider installing a reflective sign or providing suitable lighting where required. Good visibility in low-light conditions helps to improve safety and makes important information easier to recognise.
Future Maintenance
Trees, hedges, and other vegetation can grow over time and reduce the visibility of a sign. Regular inspections and routine maintenance will help ensure the sign remains clean, unobstructed, and easy to read throughout its lifespan.
Common Mistakes to Avoid When Installing Signs
Even if a sign is securely installed, a few common mistakes can reduce its effectiveness. Avoiding these issues will help to ensure your sign remains visible, durable, and easy to understand.
Installing the Sign Too Low
Signs mounted too low can be easily hidden by parked vehicles, pedestrians, or vegetation. Always install signs at an appropriate height that is easily noticeable in their intended location.
Choosing the Wrong Location
Avoid placing signs where they’re obscured by trees, bushes, fences, street furniture, or sharp bends. Road users should have a clear view of the sign with enough time to read and react.
Not Securing the Post Properly
A signpost that’s buried too shallow or isn’t secured properly can become unstable over time, particularly during strong winds or poor weather.
Using the Wrong Fixings
Always use fixings that are suitable for the sign and mounting surface. Corrosion-resistant fixings are recommended as they help improve long-term durability and reduce maintenance.
Forgetting Future Visibility
A sign that’s clearly visible today may not always be visible. Signs can easily become hidden as trees and hedges grow. Regular inspections and maintenance can help to ensure signs remain easy to see throughout their lifespan.
Round Up
Installing a sign correctly is just as important as choosing the right sign itself. Whether you’re fitting a wall-mounted or post-mounted sign, careful positioning, secure fixings, and the correct installation method will help ensure it remains visible, durable, and easy to understand.
By following the guidance in this article, you can improve safety, reduce future maintenance, and help ensure important information is clearly visible to road users and pedestrians for years to come.
Whether you’re replacing an existing sign or installing a new one, choosing high-quality signs, posts, and fixings will help ensure a safe, durable, and professional installation. Explore our range of road signs, sign posts, brackets, and accessories to find everything you need for your next project.