Poultry house washing and disinfection after a flock: the full procedure
Thorough washing and disinfection is the most critical step between flocks. Learn the right sequence of steps, choose an approved disinfectant, and keep the records required by the Veterinary Inspection.
verifiedFrom the team that has organised work on poultry farms for years.
Why is washing and disinfecting a poultry house so important?
Pathogens such as Salmonella, Campylobacter and poultry coronaviruses can survive in litter and on surfaces for weeks. Neglecting the wash between flocks is a direct route to infecting the next batch right after placement. A thorough procedure reduces the microbial load by 99.9% and is a prerequisite for any disinfectant to work at all.
All-in / all-out — the starting point of the procedure
Washing and disinfection are only effective when the house is completely empty. The all-in / all-out principle (one flock, one house) eliminates the pathogen reservoir that continuously re-infects flocks kept under a continuous system. If houses on the farm are close together, clean them in sequence starting furthest from the entrance to minimise cross-contamination.
What do the regulations say?
Polish ministerial regulations and EU requirements (Regulation EU 2016/429) oblige farmers to maintain the hygiene of their facilities. The Veterinary Inspection service may request documentation of cleaning operations — including dates, products used and concentrations. DlaFerm.pl lets you log every hygiene procedure in the app and export records for inspection.
Hygiene records and the link to the entry log
Every washing and disinfection procedure is worth recording: date, product, concentration, person responsible. Together with the entry log, these records give a complete picture of hygiene activity on the farm. More about the QR digital entry log: QR Entry Log. More about biosecurity in general: Poultry farm biosecurity.
Poultry house washing and disinfection — 7 steps between flocks
- 1
Remove birds and litter / manure
After the last batch of birds has been loaded out, remove all litter and manure from the house. Use a loader or work manually — make sure no organic residue remains in corners, under skirting boards or around the drinkers. Litter transport must use enclosed vehicles or sheeted lorries, directly off the farm or to a designated storage area that meets veterinary requirements. Also remove any dead birds that were missed during catch.
- 2
Dry cleaning and dismantling of drinker and feeder lines
Before water is introduced, remove loose dust, feathers and feed residues from all surfaces — especially from trusses, lights, sensors and fans. Dismount (or raise) the drinker and feeder lines to get unobstructed access to the floor and walls. Check for leaks and rust — both hamper washing and promote biofilm build-up. Remove or cover electrical switches, motors and electronic components that must not get wet.
- 3
Pre-soaking and high-pressure washing with detergent
Soak all surfaces with alkaline foam or a detergent solution for at least 20–30 minutes — this softens dried litter and breaks down biofilm. Then wash with a high-pressure washer (min. 100 bar) from ceiling to floor, working from the far end of the house towards the exit. Cold or warm water is adequate; hot water is not required with a good detergent, but it speeds up fat removal from feeder lines. Wash drinker lines thoroughly from the inside — biofilm in the pipes is a common source of infection.
- 4
Rinsing and drying
After washing, rinse all surfaces thoroughly with clean water to remove detergent residues — residues inactivate many disinfectants. Then ventilate the house and wait for surfaces to dry; moisture reduces the effectiveness of most products. Drying usually takes 24–48 hours depending on outside temperature and humidity. Fans speed up drying but must themselves be clean — a dirty fan scatters contamination throughout the house.
- 5
Disinfection — product selection, concentration and contact time
Choose a product with PZH or GIW approval confirming effectiveness against viruses and bacteria under farm/slaughterhouse conditions. Strictly follow the concentration and contact time stated by the manufacturer — incorrect concentration is the most common mistake. Apply by spraying or fumigation while wearing full PPE: coverall, P2/P3 respirator, eye protection. Disinfect every surface — walls, ceiling, floor, trusses, process lines and external entry points. See also: biosecurity rules · preparing the house before placement.
- 6
Drinking waterline disinfection
Waterlines are a trap — biofilm and limescale protect pathogens from disinfectants. After physically cleaning the lines (with brushes or pressure flushing), fill them with a disinfectant solution approved for drinking water (e.g. chlorine-based or organic acid-based) at the concentration and contact time stated by the manufacturer. Flush clean with water afterwards. Take the opportunity to check nipple drinkers — bent or worn nipples drip and wet the litter, which encourages Clostridium and coccidiosis.
- 7
Sanitary downtime and effectiveness check
Leave the house sealed for at least 7–10 days after disinfection — the time needed for the microbial load to fall and for the disinfectant to finish working. The longer the downtime, the lower the risk for the next flock. Before placement you can commission swabs (e.g. for Salmonella) from the floor, conveyor and drinkers — the result confirms the effectiveness of the procedure and serves as a document for the Inspection. Combine the downtime record with the disinfection log to keep a complete history of the house. See also: rodent control on the farm.
Frequently asked questions about poultry house washing and disinfection
How many times a year should a poultry house be disinfected?add
Disinfection is carried out after every flock, which means as many times per year as there are production cycles on the farm — typically 5–7 times a year with standard broiler growing (35–42 days) including sanitary downtime. Every procedure should be recorded.
Can household detergent be used to wash a poultry house?add
Household detergents are not recommended — they have no approval for livestock buildings and may leave residues harmful to poultry or inactivate subsequent disinfectants. Use products designed for animal housing, with documentation confirming effectiveness and safety.
How do I choose a disinfectant for a poultry house?add
Choose a product approved by PZH or endorsed by GIW, effective against bacteria, viruses (including enveloped viruses such as HPAI) and fungi. Rotate chemical groups between flocks (e.g. alternating: peroxygen, aldehyde, quaternary ammonium compounds) to prevent resistance building up. Consult your farm veterinarian or animal health advisor.
How long should sanitary downtime last?add
The minimum sanitary downtime is 7–10 days after disinfection, but 14 days is the recommended standard in practice. Longer downtime (14–21 days) is especially important after flocks where health problems occurred and in autumn/winter when HPAI prevalence in the environment is higher.
What is biofilm and why is it dangerous in a poultry house?add
Biofilm is a matrix of bacteria and their metabolites adhering to pipe surfaces, drinkers and walls. It protects bacteria — including Salmonella and Pseudomonas — from disinfectants, making them very hard to eliminate. Effective mechanical washing (pressure washer plus detergent) before disinfection is the only way to physically break up biofilm.
How does DlaFerm.pl support hygiene between flocks?add
DlaFerm.pl lets you record washing and disinfection procedures in the house log — dates, products, concentrations and responsible persons. The digital list is immediately available during a veterinary inspection without searching through paper files. The app links hygiene records to the entry log and the flock card, giving a complete history of the house.
Sources & resources
Keep disinfection records with DlaFerm.pl
Want to see how the app logs hygiene procedures and links them to the flock card? Write to us.
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