  The inner surfaces of the electrodes encompassing the gas volume of a
Resistive Plate Chamber (RPC) have been found to exhibit asperities with,
grossly, three kinds of features. The desired uniform electric field within the
gas volume of RPC is expected to be affected due to the presence of these
asperities, which will eventually affect the final response from the detector.
In this work, an attempt has been made to model the highly complex roughness of
the electrode surfaces and compute its effect on the electrostatic field within
RPC gas chamber. The calculations have been performed numerically using Finite
Element Method (FEM) and Boundary Element Method (BEM) and the two methods have
been compared in this context.
