COMPARISON OF THE USAGE OF SELECTED INDIGENOUS AND IMPORTED BUILDING MATERIALS IN ROOF CONSTRUCTION FOR HOUSEHOLD UNITS IN NIGERIA
ABDULRAHMAN B. S, ALEGE ABDULGANYU on 06/01/2017
Nigeria has for many years over dependent on conventional and imported building materials which are rather costly and beyond the affordability of common man. In this work an ex post facto research design was used and secondary data were collected. Data were sourced from the National Population Commission. Abuja, priority table 2006.Analysis of the data was carried out using T-Test, Bar Charts, regression analysis and analysis of variance (ANOVA) were employed to test the thirty six states of Nigeria including Abuja. The background information revealed the different types and classification of both indigenous and imported building materials viz: corrugated metal sheet, slates, asbestos sheet cement concrete, roofing tiles are imported materials while thatch, raffia palm, wood, bamboo, earth/mud are indigenous materials. It is assumed that all buildings under consideration are homogeneous, that is, all buildings are considered to be the same, irrespective of shape, size, height and design, with five persons per house hold. The weak R2 value for roof and are: 55%. The results obtained show that roofs are constructed mainly using imported materials. The proportion of local content in roofs is only about 34%. This show that 2/3 of household in Nigeria are roofed with imported materials. It is recommended that government agencies and organized private sectors should encourage the use of indigenous materials by using it in the construction of schools, markets, and public offices. In future research number of buildings can be considered, secondly, the household number could be increased from five persons to seven due to rising populations. Lastly, the shape, size and height of buildings can be used in future research.