BUILDING MATERIALS

Climate change poses significant threats to the built environment through rising temperatures, altered precipitation patterns, and increased frequency of extreme weather events. This study investigated the impact of climate change on the durability of building materials commonly used in Nigeria. A comprehensive analysis of 60 years of meteorological data (1965-2024) from the Nigerian Meteorological Agency (NIMET) was conducted across Nigeria's three climatic zones. The data was divided into two 30-year periods Historical Period 1 (HP1: 1965-1994) and Historical Period 2 (HP2: 1995-2024) to identify climatic trends and their implications for concrete, steel, timber, and masonry materials. The methodology employed secondary data collection and literature review, analyzing four key climatic parameters: mean annual temperature, total annual rainfall, mean annual sunshine hours, and mean annual wind speed. Comparative analysis revealed significant environmental shifts, with Southern Nigeria experiencing the most severe changes including temperature increases of +1.0°C, rainfall increases of +298mm, and reductions in both sunshine hours (-0.6 hr/day) and wind speed (-0.6 m/s).Results demonstrated that all building materials face substantially accelerated degradation under current conditions. Concrete experiences enhanced carbonation and chloride penetration with 2030% service life reductions. Steel reinforcement shows 30-40% service life reduction in coastal environments due to intensified corrosion. Timber faces the highest vulnerability with potential 40-50% service life reductions from enhanced fungal decay and increased termite activity. Porous masonry units experience severe efflorescence and progressive strength loss, resulting in 20-40% service life reductions. The study revealed synergistic effects where combined climatic changes produce deterioration exceeding individual impacts, with Southern Nigeria facing the most aggressive conditions. The study concludes that traditional construction practices based on historical climate data are inadequate for current conditions. Recommendations include immediate revision of building codes and material specifications, adoption of climate-resilient materials and enhanced protective systems, implementation of climate-responsive design approaches, and intensified maintenance programs for existing structures. These findings provide critical insights for stakeholders to enhance building resilience and ensure the sustainability and safety of Nigeria's built environment.