Expansion Joint
The expansion joint or the joint of roofs cast at different timings can cause leakages, it is evident in both cases due to weathering action, and the roof will expand and contract in seasons, which may result into leakages.
Even though the superior quality expansion materials are used inside the expansion joints, they become brittle due to ageing, weathering and become hard and loose its original property of original expansion quality gradually.
As this is a tricky issue and as there is no permanent solution for this, it is suggested to pour AQUATYTE solution outer side as well as either sides of the joint every year before the monsoon and forget about it for some seasons. Do not remove or replace the original expansion materials. Also please see that the water does not stand on the expansion Joint.