OVERBANDING
WHAT IS OVERBANDING
Overbanding is a surface treatment technique used on UK roadways to seal the surface of cracks or joints after they’ve been repaired — especially after crack sealing or patching work. It helps prevent water ingress, which can cause further deterioration such as potholes, fretting, or freeze-thaw damage.
Overbanding involves applying a narrow strip of bituminous material (typically a hot-applied sealant) over a crack or joint and the adjacent road surface. It provides a waterproof seal and creates a band-aid repair until a more effective repair can be made.
The UK has specific standards for overbanding to ensure safety and effectiveness - Specification for the Reinstatement of Openings in Highways (SROH):
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​Overbanding should not exceed 40 mm in width.
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Skid resistance must be adequate — anti-skid additives may be required.
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The material must comply with BS EN 14023 or similar specifications.Overbanding should be flush with the surface to avoid a trip hazard.
Benefits:
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Prevents water ingress
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Extends pavement life
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Reduces risk of crack propagation
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Cost-effective maintenance solution
Concerns & Limitations:
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Skid resistance: Overbanding can become slippery, especially when wet.
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Traffic safety hazard: Cyclists and motorcyclists are particularly at risk.
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Regulation compliance to the above specification is critical to minimize these risks.
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