In recent weeks, Mpumalanga experienced prolonged heavy rainfall, forcing some families to vacate their homes. Professor Chingombe shared his analysis of the risks associated with building on slopes in and around Mpumalanga without proper engineering assessments.
He explained that building on a sloped site presents unique challenges that require careful planning and engineering. While hillside properties can offer striking views and architectural appeal, they also pose significant risks that must be addressed to ensure safe and stable structures.
From soil erosion to increased construction costs, development on uneven terrain demands specialised solutions to mitigate potential hazards. In Mpumalanga, building on steep slopes poses several risks that must be carefully managed to ensure safety and stability. These include soil erosion, drainage and water management, foundation design, structural integrity, accessibility and overall safety.
“These risks highlight the importance of thorough geotechnical analysis and appropriate engineering solutions to mitigate potential hazards and ensure safe, long-lasting construction. Clarifying existing regulations and identifying gaps can help stakeholders understand why stricter enforcement is necessary to prevent unsafe developments,” Professor Chingombe explained.
“Across Mbombela, one of the key concerns we observe is the construction of buildings on slopes, which poses a threat to soil stability and increases erosion. The natural movement of soil can lead to landslides or shifting foundations, threatening a building’s integrity over time.”
Professor Chingombe added that areas such as Matsafeni and parts of KaNyamazane have experienced flash floods, resulting in damage to roads and houses. Foundation design and structural integrity remain major concerns where residential areas are expanding in and around the municipality without adequate planning.
“Unlike flat sites, sloped terrain requires specialised foundation solutions, such as retaining walls or deep piling, to support the structure’s weight and prevent movement. These additional requirements contribute to higher construction costs and engineering challenges, as the complexity of excavation, material transportation and labour increases. Such considerations are often not taken into account in many construction projects we observe around Tekwane North and the surrounding community sections,” he said.
According to Professor Chingombe, safety concerns also extend to the long-term stability of both the built structure and its surrounding environment. Sloped sites are more susceptible to landslides, rockfalls and soil shifting, which can pose serious risks to buildings and their occupants.
This article was first published in the Mpumalanga News. Follow the link to read more:
https://www.citizen.co.za/mpumalanga-news/news-headlines/local-news/2026/02/02/university-of-mpumalanga-professor-shares-analysis-on-dangers-of-building-on-slopes/