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Weber Saint-Gobain - Official website of the company

Installing precast kerbs or drainage units

Precast kerbs can be glued together with a special structural adhesive available from Weber. Also intended for the highway maintenance crew’s armoury are ultra quick bedding mortars that can be mixed and applied to minimise traffic disruption.


Heavy-duty kerbs and drainage units need to be reinstated when damaged or where a kerb line needs to be altered for a new vehicle crossing or realignment. Drainage units on bridge decks need to be replaced during bridge deck refurbishment.

1. Precast kerbs

Precast kerb units can be damaged, dislodged or broken by vehicle traffic. Often, kerb units are dislodged by vehicles striking the kerb unit.

Regular maintenance is required to replace damaged kerb units.


2. Drainage units

Heavy-duty kerb units and drainage units can be dislodged by accidental wheel loading. The existing sand/cement bedding can break up under traffic loading, resulting in settlement.

Often, the bed thickness is limited on bridge decks and conventional sand/cement mortar is unsuitable.


Use appropriate mortars to comply with HA guidance

Use resin-based bedding mortars for reinstatement of heavy-duty drainage units to comply with Highways Agency guidance. For precast kerbs use shrinkage-compensated, rapid-setting cement-based bedding mortar to comply with HD27/94.

Solution with the following Weber products

Solution 1

webercem pyrabed

Shrinkage-compensated, rapid setting bedding mortar for the reinstament of road iron work and highway furniture

webertec bedding mortar

Polyester-based mortar for bedding and fixing manhole frames, kerb stones, airport lighting bases, ducting, drains and highway fixtures

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