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Relationship Between Finished Floor Level and Surface Water Protection

Abstract

The study examines the relationship between finished floor level and surface water protection in buildings, with emphasis on how the vertical position of the finished floor relative to surrounding ground levels influences the protection of interior spaces from surface water intrusion. Finished floor level is an important consideration in building and site planning, particularly in areas exposed to heavy rainfall, surface runoff, poor drainage, and temporary water accumulation. Inadequate floor levels may increase the likelihood of water entering buildings through entrances, openings, floor edges, and other vulnerable points. The study will assess the relationship between finished floor level and surface water protection in selected buildings. Attention will be given to the height of finished floors above surrounding ground levels, site slope, drainage patterns, entrance thresholds, external paving, surface runoff pathways, building setbacks, and the relationship between floor levels and adjacent outdoor surfaces. Surface water protection will be assessed based on evidence of water entry, waterlogging around buildings, dampness, splash exposure, drainage effectiveness, and the condition of vulnerable building edges and entrances. A descriptive cross-sectional research design will be adopted for the study. An appropriate sample of selected buildings and their surrounding sites will be selected using a suitable sampling technique. Data will be collected through physical observation, measurement of finished floor and surrounding ground levels, site drainage assessment, photographic documentation, mapping of surface water pathways, and structured questionnaires or interviews with building occupants and relevant professionals. The collected data will be analyzed using descriptive statistics such as frequency, percentage, mean, and standard deviation, while appropriate comparative and correlation techniques will be applied to examine the relationship between finished floor level and surface water protection. The study is expected to reveal that finished floor level has a measurable relationship with protection against surface water. Buildings with appropriately elevated finished floors are expected to experience less surface water intrusion and reduced exposure to waterlogging around entrances and building edges. Buildings with low floor levels relative to surrounding ground may be more vulnerable to runoff, ponding, dampness, and water entry during periods of heavy rainfall. The level of protection may also vary according to site slope, drainage capacity, rainfall intensity, ground permeability, paving, entrance design, and maintenance of drainage facilities. The findings will be useful to architects, building designers, site planners, contractors, developers, facility managers, and other professionals involved in building and site development. The study may provide practical information for determining suitable floor levels during building planning and for coordinating floor elevation with site grading and drainage arrangements. It may also support design approaches that reduce surface water intrusion, improve building durability, and enhance environmental resilience. The study will conclude by establishing the relationship between finished floor level and surface water protection and emphasizing the importance of coordinating building elevation with site drainage and surface water management. It is recommended that finished floor levels be carefully determined in relation to existing ground levels, site topography, drainage routes, and expected surface runoff, while appropriate entrance and site drainage measures should also be provided. Further studies should examine finished floor levels across different site conditions, building types, and rainfall environments.

Keywords: Finished floor level, surface water protection, building elevation, surface runoff, flood protection, building drainage, site planning, floor level, water intrusion, waterlogging, site grading, stormwater management, building design, residential buildings, environmental design.