Joint Sealing

Movement affects all structures to varying degrees and can be caused by temperatures changes, shrinkage, settlement, loading etc. Provision to accommodate such movement needs to be provided at expansion joints at appropriate intervals. Where movement in excess of this occurs, by design or otherwise, other joint finishing techniques are required.

Many expansion joints are finished with poured or gun applied mastic sealants, but these can only accommodate movement up to around 30% of the joint gap width.

In many structures this causes difficulties in that joints need to be sealed to prevent weather ingress or to provide containment for water, effluent, flowing solids, whilst still allowing movement to take place.

We also install more conventional mastic type sealants, using materials selected for movement capability, speed of cure, chemical resistance, and so on.