A small crack in an asphalt surface can appear relatively harmless. Vehicles may still travel over it comfortably, the surrounding pavement may remain level, and there may be no obvious potholes or loose material. However, cracks can provide an entry point for water, allowing what begins as surface deterioration to affect the pavement underneath.
Asphalt performs as part of a complete pavement structure. The visible surface provides the wearing layer, while the underlying materials provide much of the support needed to carry regular traffic. When water penetrates through open cracks and reaches these supporting layers, the pavement can become increasingly vulnerable to movement and deterioration.
For property owners and businesses in Shepparton, VIC, dealing with suitable asphalt cracks before significant water penetration occurs can help preserve otherwise serviceable pavement. At Shepparton Road Tech, we assess cracking in relation to the wider pavement condition so that maintenance addresses the cause and severity of the problem rather than simply improving its appearance.
Why Are Cracks a Problem for Asphalt Pavements?
Cracking means the asphalt surface is no longer completely continuous.
The severity of the problem depends on the type, width and extent of the cracks, as well as what is happening underneath them. A small isolated crack in otherwise stable asphalt is very different from widespread cracking accompanied by settlement or pavement movement.
Once a crack opens, however, rainfall can potentially enter the pavement.
Over time, this can contribute to:
- Weakening of supporting pavement materials
- Movement under vehicle loading
- Enlargement of existing cracks
- Edge deterioration around the crack
- Depressions and settlement
- Pothole development
- Broader pavement failure
Sealing appropriate cracks early is intended to reduce one of the pathways through which water can reach vulnerable material below.
What Happens When Water Gets Through Asphalt?
The asphalt surface itself is only one component of the pavement.
Below it are prepared layers designed to provide stable support and distribute vehicle loads. These layers perform best when they remain in suitable condition.
When water repeatedly enters through cracks, it can affect that support.
The Base Can Begin Losing Stability
Depending on the pavement construction and condition, excess moisture can contribute to softening or movement within supporting materials.
Traffic then places repeated loads over the weakened section.
Instead of being supported by a firm and consistent foundation, the asphalt may begin flexing or moving more than intended. This can place additional stress on the surface and cause existing cracks to become progressively worse.
The result can become a cycle: cracking allows more water into the pavement, the pavement becomes less stable, and movement creates further cracking.
Early Crack Sealing Can Help Interrupt That Process
Where cracking is suitable for sealing and the surrounding pavement remains structurally sound, early maintenance can help prevent water from readily entering through the opening.
This is very different from waiting until the crack has developed into a larger pavement failure.
A relatively narrow crack may initially be confined to the surface. Once the surrounding asphalt starts breaking away or the pavement underneath begins moving, the required repair can become more involved.
This is why cracks should be assessed based on what they could allow to happen underneath the surface, not simply on how noticeable they look.
Small Cracks Can Become Wider Under Traffic
Vehicle movements continually load an asphalt pavement.
When the pavement is intact and well supported, these loads are distributed through the pavement structure. Around an existing crack, however, repeated loading can place stress on the crack edges.
If water has also weakened the material underneath, movement may become more pronounced.
Signs that a crack is progressing can include:
- Increasing width
- Broken or crumbling crack edges
- Several cracks forming nearby
- Depression around the affected section
- Loose asphalt particles
- Water remaining within the crack
- Small potholes beginning to form
These symptoms suggest that the condition should be assessed rather than ignored.
How Can Water Contribute to Pothole Formation?
Potholes do not normally appear without some form of preceding pavement deterioration.
Cracks can provide one pathway for moisture to enter the pavement. If the supporting material becomes unstable, vehicle tyres can repeatedly load the weakened area.
The asphalt may then begin breaking away.
As material is displaced, a small opening can gradually develop into a pothole. Continued traffic can enlarge the damaged area and expose more of the pavement underneath.
Sealing suitable cracks before this process develops can therefore form part of preventative asphalt maintenance.
Not Every Crack Should Simply Be Sealed
Crack sealing has an important role, but it is not a solution for every type of asphalt cracking.
Before maintenance is carried out, the cracking should be assessed to determine whether the surrounding pavement remains stable.
Structural Cracking May Require More Than Sealing
If cracks have developed because the pavement underneath is moving, sealing the visible opening does not correct the structural weakness.
Warning signs can include:
- Extensive interconnected cracking
- Significant settlement
- Deep wheel rutting
- Repeated cracking after previous repairs
- Movement under vehicle traffic
- Potholes surrounding cracked areas
- Large sections of unstable pavement
Where these conditions exist, deeper repair may be necessary.
The important point is to match the repair method to the reason the crack developed.
Drainage Conditions Should Also Be Considered
Crack maintenance should not be viewed separately from pavement drainage.
If large amounts of water regularly collect over a cracked section, the pavement can experience greater moisture exposure than an area where rainfall drains away effectively.
Standing water can also highlight existing level problems.
Look for conditions such as:
- Water collecting in depressions
- Ponding around cracked areas
- Drainage travelling along wheel paths
- Potholes repeatedly developing in low sections
- Erosion along pavement edges
Where drainage contributes to deterioration, correcting the crack alone may leave the broader issue unresolved.
Cracks Around Pavement Edges Need Attention
Asphalt edges can be particularly vulnerable because they have less surrounding pavement support than central sections.
If water enters through cracking near an unsupported or eroding edge, deterioration can progress as material underneath is lost or weakened.
Vehicle tyres travelling close to the edge can add further stress.
An effective assessment therefore considers the condition of both the crack and the surrounding pavement edge.
Previous Repairs Can Develop New Cracks
Older asphalt repairs should also be monitored.
A patch may remain stable for a long period, but cracking can sometimes develop around its perimeter where old and newer pavement meet.
The presence of a crack does not automatically mean the previous repair has failed.
However, if the crack continues widening, water enters around the repair, or the patch begins moving or settling, further assessment is worthwhile.
Maintenance is most effective when problems are addressed while the surrounding pavement remains serviceable.
Why Is Timing Important?
There is a significant difference between maintaining an intact pavement with early cracking and repairing an area where water penetration has already contributed to deeper deterioration.
Early attention can help preserve existing pavement that remains structurally useful.
Waiting until cracks have widened and the surrounding surface has begun breaking apart can allow the affected area to become more difficult to address through simple maintenance.
The purpose of timely crack treatment is therefore not merely cosmetic. It is about helping protect the pavement structure underneath.
Can Cracks Be Sealed Before Asphalt Resurfacing?
Cracking is an important consideration when an older asphalt surface is being assessed for resurfacing.
A new layer should not simply be placed over defects without first understanding their condition.
Stable localised cracking may be prepared as part of the resurfacing process. Areas affected by structural movement, settlement or base failure may require deeper repair beforehand.
This preparation helps create a more dependable foundation for the resurfaced pavement.
When Is Patching More Appropriate?
Once deterioration extends beyond a simple crack, localised patching may become more appropriate.
For example, if asphalt around the crack has started breaking away or the supporting pavement has become unstable, the affected section may need to be removed and rebuilt.
The repair can then address the weakened material rather than treating only the visible opening.
This highlights why early assessment is useful. It allows contractors to determine whether crack sealing remains suitable or whether deterioration has progressed further.
Professional Assessment Helps Identify the Type of Cracking
Different cracks can indicate different pavement conditions.
Some are associated primarily with surface ageing, while others can point towards movement, settlement or weakness within the pavement structure.
At Shepparton Road Tech, we assess asphalt surfaces in Shepparton, VIC, by looking at the cracking together with the surrounding pavement.
Important considerations include:
- Crack width and extent
- Pavement movement
- Existing potholes
- Previous repairs
- Surface levels
- Drainage
- Rutting or settlement
- Condition of the pavement edges
- Expected traffic demands
This provides a clearer understanding of whether sealing, patching, resurfacing or more substantial preparation is appropriate.
Preventative Maintenance Can Help Preserve Sound Asphalt
An asphalt pavement does not necessarily need to be badly damaged before maintenance becomes worthwhile.
In many cases, the best opportunity to preserve a surface is while most of the pavement remains stable.
Addressing appropriate cracks before substantial water penetration occurs can help protect the supporting layers and reduce the likelihood of localised defects progressing unchecked.
Regular observation can also help identify changes early. A crack that remains relatively unchanged is different from one that is rapidly widening or surrounded by new deterioration.
Protecting the Pavement Below Is the Main Objective
The most important reason to address asphalt cracks is not simply to make the surface look neater.
It is to protect the pavement system underneath.
A well-performing asphalt surface depends on stable supporting material. Once water finds repeated pathways below the surface, that support can become more vulnerable to traffic-related movement.
Crack sealing, where appropriate, helps limit those pathways while the pavement remains in a condition worth preserving.
Conclusion
Asphalt cracks should be assessed and, where suitable, sealed before water is able to repeatedly penetrate into the pavement below. What begins as a relatively minor opening can provide a pathway for moisture to reach supporting materials, contributing to movement, widening cracks, settlement and eventually pothole formation.
Early crack sealing can be a useful preventative measure when the surrounding asphalt and underlying pavement remain stable. However, widespread cracking, significant settlement, rutting or recurring failures can indicate deeper problems that require more than surface sealing.
For property owners and businesses in Shepparton, VIC, Shepparton Road Tech provides professional asphalt and bitumen surfacing with careful attention to cracking, drainage and underlying pavement condition. If cracks are beginning to develop across your asphalt surface, contact our team to arrange an assessment and determine the appropriate maintenance or repair approach before deterioration progresses.
Call us on: 03 5907 5891
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