The construction industry is renowned for being fragmented and complex due to supply chain difficulties and the various stakeholders involved. A project can face an array of problems throughout its lifecycle, resulting in extensive cost and time overruns. One critical aspect of construction management and a contributor to these problems is poor inventory management, along with the insufficient management and control of materials on-site. It is paramount that the correct materials are readily available to complete the project in a timely manner. Therefore, the aim of this study is to investigate inventory management and controls on construction projects in Ireland. Specifically, it aims to identify inventory and waste issues, if any, and document counteractive strategies to eliminate waste and improve the materials management process on-site. The research method undertaken is qualitatively based, using five semi-structured individual interviews with construction professionals on case study projects located throughout the Leinster region of Ireland. The resultant data is assessed using thematic analysis, where emerging themes, keywords, and phrases are identified for discussion. Ten issues are identified, including no storage and materials manager on-site, a lack of space on-site to store all the materials, labour training issues due to large staff turnover, and poor communication among staff. Strategies highlighted the need for a storage manager on-site, a designated storage area for materials and equipment, hosting regular toolbox talks for staff, and improving the language barrier amongst foreign national employees to aid site efficiency. Although based on a small sample size, the findings indicate that inventory management is a prevalent issue on Irish construction sites, and appropriate strategies are necessary to counteract the problem. Overall, the key contribution of this research illustrates that there are many issues regarding inventory management; however, there are also many strategies to control and eliminate waste on construction projects in Ireland.