Chapter 1: Construct poultry structures

Constructing poultry structures is a fundamental skill for animal production professionals in Kenya, as proper housing directly affects bird health, productivity, and biosecurity. This chapter explores the essential tools, equipment, and materials required for building durable, efficient, and climate-appropriate poultry houses. Understanding these components ensures that poultry farmers can optimize their investments and provide safe environments for their flocks, whether in rural farms or peri-urban commercial setups.

1.1 Construction tools, equipment and materials

Building a poultry house needs three kinds of resources: hand tools that a worker holds, larger equipment that is often powered, and the materials that become the house itself. They are chosen by what is available, what they cost, how long they last and how well they suit the local climate and the size of the flock. A smallholder building a 200-bird deep litter house may use only hand tools and bought materials, while a commercial layer unit building a long house for thousands of birds hires machinery for site work and lifting.

1.1.1 Tools

Tools are handheld devices used for manual tasks during construction. Using the right tool for each task gives accurate work, protects the worker and saves time. The table lists the tools a poultry house builder needs and what each one does.

Hammer

The hammer drives nails into timber and pulls out bent ones with its claw. For a poultry house it is used on wall framing, roof battens, door frames and nest-box frames. A hammer with a comfortable grip and a tight head reduces fatigue over a long day and lowers the risk of the head flying off. Strike the nail squarely with the face of the hammer and keep your eyes on the nail head, not the hammer.

Screw drivers

Screw drivers turn screws into timber and metal. Flat-head and cross-head (Phillips) tips are both needed, and the tip must match the screw head or it will slip and damage the head. Screws hold timber joints, hinges and drinker brackets more firmly than nails and can be removed without breaking the wood, which is useful when equipment fixed to a wall must later be moved or repaired.

Red-handled screwdriver on rock outdoors (Source: Wikimedia Commons)

Tape measures

A tape measure gives the accurate lengths, widths and heights that a poultry house plan depends on. Floor area decides how many birds the house can hold, so an error in measuring the length of a wall changes the stocking capacity as well as the fit of the roof. Pull the tape straight, read it at eye level and measure twice before cutting any material.

A 3m (10ft) measuring tape (Source: Wikimedia Commons)

Level

A spirit level shows whether a surface is horizontal or a post is vertical by the position of an air bubble in a liquid-filled vial. It is used on foundations, floors, wall courses and roof beams. A floor that is not level leaves puddles, and a wall that leans weakens the whole structure and leaves gaps for draughts and predators. A long level laid on a straight board gives a reliable reading over a longer distance.

A traditional spirit level tool (Source: Wikimedia Commons)

Saw

A handsaw cuts timber, plywood and poles to the lengths in the plan. Its teeth cut on the push stroke, so start with short, light strokes along a pencil line and let the weight of the saw do the work. A sharp blade and a firm handle improve accuracy and reduce strain. Where electric power is available, a circular saw with a blade guard, usually 7 to 10 inches in diameter, cuts large timber sections and plywood sheets faster, but it needs eye protection, a steady stance and a sharp, undamaged blade.

Traditional handsaw with wooden handle (Source: Wikimedia Commons)

Drill

A drill makes holes for bolts, screws, hinges and cable runs. A hand drill suits a small job, while a corded or cordless power drill with variable speed drives screws and bores holes in timber and metal much faster. Choose a bit that suits the material (a wood bit for timber, a masonry bit for blocks) and replace bits when they become dull. Check that the battery is charged or that the cable is undamaged before starting.

Pliers

Pliers grip, bend, twist and cut wire and small fittings. In poultry house construction they are used to tie binding wire on reinforcement, twist wire mesh onto frames and fix clips on cage and nest-box fittings. Pliers with insulated handles give some protection when working near wiring, but they are never a substitute for switching the power off.

Chisel

A chisel shapes timber, cuts joints and removes waste wood with precision. It is used for the notches that let a rafter sit on a wall plate and for the housing of a door hinge. Keep the cutting edge sharp, cut away from your body, and clamp the timber rather than holding it in your hand.

Other tools used on a poultry house site

• Wire cutters: cut fencing wire and the mesh that keeps predators out and lets air in.
• Masonry trowel: mixes and spreads mortar when laying blocks or bricks for foundations and walls.

Care and safety of tools

• Clean tools after use to prevent rust, especially in humid coastal areas, and wipe the metal with a lightly oiled cloth before storing it.
• Sharpen saw blades and chisels regularly: a sharp tool cuts cleanly and is less likely to slip and cause injury.
• Store tools in a toolbox or a lockable shed, off the ground, to protect them from damp and theft.
• Wear gloves and safety goggles when cutting, chiselling or drilling, and boots when moving timber and sheets.

1.1.2 Equipment

Equipment means the larger, often powered machines that do heavy work on a construction site. A smallholder may build with hand tools and hire a machine for a day when a job is too heavy, while a commercial farm may use equipment throughout. A hired machine is run by a trained operator, and the farmer's job is to prepare the site, show the operator the layout and keep everyone else clear of the working area.

Bulldozer

A bulldozer pushes soil with its front blade. On a sloping or bushy site it clears vegetation, removes stumps and cuts a level platform so that the house floor sits above the surrounding ground and rainwater drains away. Working only on the footprint the plan shows, rather than clearing more land than needed, saves cost and leaves trees that give shade and windbreak.

Cranes

A crane lifts heavy or awkward loads that workers cannot raise by hand. On large steel-framed houses it places trusses and roof sheets, and it can set feed bins or water tanks on their stands. The load must stay within the crane's rated capacity, the ground under it must be firm, and nobody may stand under a raised load.

Dump trucks

A dump truck carries bulk materials such as sand, ballast, hardcore and quarry dust to the site and tips them where they are needed. It also removes surplus soil. Order materials by the volume the job needs so that heaps are not left to wash away or to block the working area.

Mixer

A concrete mixer turns a drum that blends cement, sand, ballast and water into a uniform mix much faster and more evenly than turning the mix by hand with a shovel. Measure the materials by volume with the same container each time. A commonly taught nominal mix for ordinary floor concrete is 1 part cement, 2 parts sand and 4 parts ballast by volume, but the mix on the drawing always takes priority. Wash the drum out immediately after the last batch, because hardened cement inside the drum ruins it.

Forklifts

A forklift lifts and moves loads on pallets. On a building site it moves stacks of blocks, bags of cement and bundles of roofing sheets from the delivery point to where they are needed. A building contractor on a large layer or broiler site may use one, and the same machine later handles pallets of bagged feed in the store. Only trained operators drive it, and loads must be balanced on the forks and carried low.

Other powered equipment on a poultry house site

• Vibrating compactor: petrol or electric plate that compacts soil and hardcore so the foundation and floor do not settle. Its oil level and vibration mechanism are checked regularly.
• Welding machine: arc or MIG type that joins steel frames, door frames and cage supports. Check cables and earthing before use, and wear a welding mask, gloves and protective clothing.

Equipment use and maintenance

• Clean concrete mixers immediately after use so that cement does not harden inside the drum.
• Check battery charge, cables and plugs of power tools before work, and replace drill bits and saw blades when worn.
• Keep guards fitted on saws and other cutting equipment.
• Check hydraulic hoses, oil, fuel and tyres or tracks of heavy machines before each shift, and let only trained operators use them.

Choosing equipment for a poultry project

• The scale of the project decides what is justified: smallholders often hire equipment to avoid the cost of buying it.
• Spare parts and technical support should be available locally, or a breakdown can stop work for days.
• Power supply matters: where grid power is unreliable or absent, petrol or diesel machines are more practical.
• Compare the cost of hiring a machine with the cost of the labour it replaces before deciding.

1.1.3 Materials

Materials form the physical body of the poultry house. They are chosen for durability, cost and suitability to the climate, and the right choice makes the house more comfortable for the birds, cheaper to maintain and easier to keep free of disease. Smooth, hard surfaces can be washed and disinfected, while rough or porous ones hold dirt and pathogens.

Cement

Cement is the binder in concrete, mortar and plaster. Ordinary Portland cement is bought in 50 kg bags. It hardens when mixed with water, so bags must be stored in a dry shed, raised off the floor on pallets, and used in the order they were delivered. A bag that has lumped into hard balls is no longer usable for structural work. Concrete made with cement forms the foundation and the washable floor of the house.

Sand

Sand is the fine aggregate in concrete and mortar. It should be clean, sharp and free of clay, silt, salts and plant matter, which weaken the mix and cause cracks. Building sand fills the gaps between the coarser ballast and gives the mortar its body. Buy sand by the volume needed, and keep it covered or on a hard standing so rain and soil do not contaminate it.

Blocks

Blocks are the walling units. Concrete blocks and machine-cut stone blocks give strong, permanent walls that resist termites, rodents and fire, and a plastered or smooth surface washes easily. Hollow blocks are lighter and cheaper than solid ones, and sizes differ by manufacturer, so the plan should state the size used. Lay blocks in staggered courses with full mortar joints and check each course with a level. Where walls must be open for ventilation, the lower part is built in blocks and the upper part is left open with wire mesh.

Quarry dust

Quarry dust is the fine crushed-rock by-product of stone quarries. It is used with or in place of part of the sand in block making, floor screeds and as a compacted bed under floors, and it is usually cheaper than river sand. It holds water, so it is mixed with care, and it should be kept clean of soil and organic matter. Using quarry dust rather than sand dug from riverbeds also reduces damage to rivers.

Other construction materials

• Timber: frames walls, roofs and floors because it is available and easy to work. Treated cypress, cedar or eucalyptus poles and sawn timber resist termites far better than untreated wood, so treat all timber that touches the ground.
• Corrugated iron sheets: widely used for roofing because they are durable and shed rain well. They heat the house in the sun, so an overhang and good ventilation are needed.
• Wire mesh: galvanised mesh keeps predators out and allows ventilation, and it resists rust in humid areas.
• Concrete: gives a firm foundation and a floor that is easy to clean, which lowers disease risk.

Material properties that affect poultry house performance

• Thermal insulation: materials that reduce heat gain keep the house comfortable for the birds.
• Moisture resistance: materials must withstand rainy seasons without rotting or growing mould.
• Pest resistance: treated timber, concrete and blocks reduce termite damage and rodent entry.
• Ease of cleaning: smooth surfaces such as concrete floors make washing and disinfection effective.
• Cost and availability: locally sourced materials cut transport costs and make repairs quicker.

Sustainable and alternative materials

• Bamboo and recycled plastics are used as lower-cost options for light structures such as brooder partitions.
• Straw bales and mud bricks give good insulation but must be treated and protected from rain to prevent pests and decay.
• Solar-powered ventilation fans improve air movement without raising the electricity bill.

Chapter Summary

This chapter covered the essential tools, equipment, and materials needed for constructing poultry structures, emphasizing their roles and proper use in the building process. It then explored the criteria for selecting an appropriate site, considering factors such as drainage, ventilation, and accessibility to ensure optimal poultry health and productivity. The design of poultry structures was examined with attention to layout, space requirements, and environmental control to support bird welfare. Detailed steps for constructing poultry houses were outlined, highlighting best practices for durability and functionality. The importance of maintaining accurate records related to construction and upkeep was discussed to facilitate effective management and future repairs. Waste management strategies were introduced to promote hygiene and environmental sustainability within poultry operations. The chapter also identified key poultry house equipment and materials, followed by guidance on their correct installation to support efficient poultry production. Finally, the development and use of poultry production manuals were addressed as vital tools for standardizing procedures and enhancing operational consistency.