Hydraform interlocking block system is gradually gaining recognition and is increasingly used in most developing countries like South Africa, Zambia and Nigeria for low-income housing delivery. The block system has many advantages with regards to savings on the cost of construction, time of construction delivery, durability. The study found out through a questionnaire survey and analysis of cost efficiency from bills of quantities the comparative cost study of hydra form interlocking blocks and the conventional sandcrete blocks in low- income housing delivery in Kaduna metropolis of Nigeria. The study revealed that the use of hydraform blocks in low-income delivery is cost-efficient, but its application in low-income housing delivery in the chosen area of study is very low when compared to the conventional sandcrete blocks. The study recommends that professionals in the building industry should promote the use of hydraform interlocking blocks and similar sustainable alternative type of block in low-income housing to encourage it and awareness.
To the extent possible under law, all copyright and related or neighboring rights to this work have been waived under the Creative Commons Public Domain Dedication.