Recommendations for selection of dairy floor finishes
1975 Edition

IS 7956 recommends using steel or cast iron tiles for zones experiencing intense impact and abrasion, supported by a sub-floor structure. Solid steel plates mounted on an under-floor framework are also suggested where maximum durability is needed. These finishes must endure heavy mechanical vibrations, resist mild corrosive substances like milk and detergents, provide a non-slip surface even when wet, be easy to clean, and allow quick repairs to maintain hygiene and safety within dairy operations.

According to IS 7956, ceramic unglazed vitreous acid-resistant tiles (IS:4457-1967) and acid-resistant bricks (IS:4860-1968) offer excellent long-term resistance to acids found in milk and milk products, as well as adequate protection against mild alkaline detergents. While metal tiles have high alkali resistance, they are vulnerable to weak acids and therefore less appropriate for acidic environments. For drainage systems, salt-glazed pipes and chemical-resistant tiles with resin mortar joints are recommended to withstand chemical exposure.

Waterproof membranes per IS 7956 are laid between the structural concrete base and the floor finish, using acid-resistant bitumen mastic over saturated bitumen or fiberglass-based felt (referenced in IS:1322-1970 and IS:7193-1974). The concrete base must be prepared by removing laitance and roughening the surface to ensure adhesion. The membrane should be continuous, watertight, sloped to direct liquids quickly toward drains, and isolated from the structural base to avoid stress damage. This layered approach protects the concrete and reinforcement from corrosion by preventing effluent ingress.

IS 7956 advises a minimum floor slope of 1 in 80 (1.25%) toward drainage points to facilitate rapid removal of liquid spills. Drainage layout options include sloping from side walls to a central channel, dividing floors into bays with cross channels, or configuring rectangular troughs each with central drains. Drain pipes should be constructed from chemically resistant salt-glazed materials, with joints sealed using chemical-resistant resin mortar. A waterproof membrane beneath the floor finish further prevents effluent leakage and protects reinforcement from corrosion.

To maintain hygienic and durable dairy floors in line with IS 7956, select floor finishes that resist heavy impact, abrasion, vibration, and mild chemical corrosion. Surfaces must remain non-slippery even when wet and be smooth for easy cleaning using appropriate detergents and disinfectants. Floors should have well-designed drainage to prevent water accumulation, and structural bases should incorporate damp-proofing to avoid moisture damage. Prompt repair of damaged areas is essential to prevent contamination and further deterioration. Recommended finishes include dense concrete with chemical-resistant sealers, epoxy or polyurethane coatings, and non-slip ceramic tiles for smaller dairies.