Electrical utilities these days are adopting asset management approaches to achieve a safe, secure, reliable and resilient network for their customers. Such approaches require examining the life-cycle implications of different components on the network. While electrical insulators represent only a small fraction of the overall cost of an overhead line asset, their functionality plays a key role in ensuring continuity of supply and line performance. This presentation provides an overview of the overhead line network in Ireland and discusses the types and designs of insulation used at transmission and distribution voltages. It also highlights the various inspection methodologies used to supply information on the condition of insulators.