Residential construction quality and production levels in Taiwan

Purpose - The aim of this article is to present a new, simple applicable method of inferring and assessing residential construction quality at an industry-wide level. Design/methodology/approach - Construction quality is measured using ratios of structural materials to production levels. Cement and reinforcing bar per 1,000m2 of residential floor space are the metrics, especially appropriate in Taiwan as new dwelling units (virtually all apartments and row houses) and all of reinforced concrete. Complementary measurements of quality for labour and non-structural construction material inputs were also made. Findings - The structural input and complementary measures indicate that the quality of Taiwanese residential construction declines dramatically and consistently at higher production levels. The implication is that dwelling units from the 1990s construction boom are especially at risk. Research limitations/implications - The methods cannot be used to identify specific buildings at risk. The methods are difficult to apply in situations where construction methods and residential types are heterogeneous. Practical implications - Construction quality can be monitored on a regular basis so industry-wide steps can be taken if quality declines appear. The evidence is consistent with Taiwan's sub-contractor network enabling rapid expansions and contractions at the expense of hidden quality failure. Originality/value - This paper provides information that could lead to much firmer regulatory systems, hence has the potential to help save lives and property.