Medium-density housing construction quality survey, SR412 
- Valid from
- Information provider
- BRANZ Limited
- Matthew Curtis and Nick Brunsdon
- Information type
- Study report
This is the first of a series of reports into the construction quality of medium-density housing (MDH).
It is designed to help answer the research question 'What are the technical issues that affect MDH?' taking a case study approach to determine what technical issues are occurring on site.
Problem areas that have been found as part of this study included:
- Weathertightness risks
- Roof bracing
- Provisions for services, and
- Lack of common design detailing for MDH
Many of these issues are shared with stand-alone housing. However, the risk of failure is potentially higher in MDH, as the construction is generally taller and utilises multiple claddings with complex wall junctions and narrow eaves.
This study also looks into learning from the existing stock of MDH, particularly around the need for maintenance. The study proposes utilising cladding materials that have low life cycle costs, which are typically those with lower maintenance requirements.