Livestock Polytunnels: Buying, Installation and Cover Guide

A poorly specified livestock polytunnel can lead to damaged covers, difficult stock handling and an early replacement bill. Choosing a frame, cover and fixing system suited to your site conditions can help reduce premature cover damage while providing animals with a practical, well-ventilated shelter.

Start by considering the intended use, required delivery date and who will handle the installation. For a realistic installed budget, allow for tunnel dimensions, cover specification, anchoring, groundwork, delivery, installation and VAT. Also plan for maintenance and the eventual cost of a replacement cover.

What should you consider when choosing a livestock polytunnel?

Base the dimensions on stock numbers, pens, bedding, water points and safe handling routes. Measure the full width and height of tractors, loaders and bedding equipment, including mirrors and raised booms. Check turning space outside each entrance.

Give each supplier the same pre-quotation information so the offers can be compared properly:

•            Site postcode, ground conditions, slope and exposure to wind

•            Overall dimensions, doorway sizes and required internal layout

•            Intended livestock use, group sizes and stocking pattern

•            Power and water requirements

•            Delivery access and responsibility for unloading

•            Planning stage and any restrictions already identified

•            Groundwork, drainage and site preparation included in the price

•            Installation responsibility and required completion date

•            Budget, VAT status and whether quoted prices include VAT

•            Frame and cover warranties, exclusions and maintenance obligations

•            Expected cover life and future replacement-cover availability

Compare steel tube dimensions, hoop spacing, bracing, galvanised finish, door construction and ground fixing. Include lower rails or internal barriers to protect the sheet from livestock and machinery.

Which polytunnel cover is suitable for livestock?

First, check that the cover is suitable for the intended livestock and conditions, then compare UV stability, reinforcement, warranty terms and expected service life. Opacity or light transmission, anti-condensation properties and micron thickness also matter, but thickness alone does not indicate quality. If fire performance is relevant, ask for the applicable test information.

Get written confirmation that the material is suitable for the intended seasonal use and ventilation design. Installation matters too. A loose sheet can rub against the frame, while excessive tension may weaken corners and fastening points. Compare livestock polytunnel cover options before requesting prices.

Where should the polytunnel be positioned?

Choose a drained, accessible site away from hollows where rainfall, slurry or dirty water may collect. Account for prevailing winds, falling branches, vehicle movements, feed deliveries and muck removal. Leave working space around the structure for installation and future cover replacement.

Planning requirements vary with the site, building and proposed use. In England, agricultural permitted development cannot be assumed from farm size alone. Eligibility depends on the relevant permitted development class, the size of the agricultural unit, building dimensions, location, use and any prior approval requirements or restrictions. Use the GOV.UK planning guidance for farms as a starting point, check with your local planning authority to confirm the position before purchase.

Drainage and pollution controls also need early attention. Discuss site-specific risks with the relevant environmental regulator before work starts. In England, the Farming Rules for Water guidance covers run-off and pollution from manure, slurry and soil.

How should a livestock polytunnel be fixed to the ground?

The supplier or a competent structural designer should specify the frame and anchoring to suit the ground conditions, altitude, wind exposure and expected snow load. Question the supplier to state the design basis for the frame and anchoring. The quotation should also identify the assumed wind and snow loads, foundation requirements and any limitations for exposed or high-altitude sites. Earth anchors, concrete foundations and cast-in fixings are not interchangeable.

Obtain written details for the hoops, bracing, base rails, foundations and anchors, including installation tolerances and inspection requirements. The quotation should state any exclusions for unsuitable ground and who is responsible for assessing it and signing off the completed structure. Made ground, shallow soil and wet clay may require further investigation. Protect entrance posts from vehicle strikes and fit secure door restraints for both open and closed positions.

What is the correct installation sequence?

Prepare the site and frame

Complete drainage, levels and access work first. Set out the structure square, install the specified anchors, then assemble and brace the frame. Check hoop alignment and fit door frames, livestock barriers and approved ventilation components. Remove sharp edges and metal swarf before covering.

Fit the cover in suitable conditions

Work in calm, mild weather with enough people and suitable lifting equipment. Centre the sheet, follow the supplier’s fastening sequence and tension both sides gradually. Inspect doors, corners, joints and every frame contact point from inside.

Buyers who do not have trained labour or suitable equipment should review the available polytunnel installation options when comparing quotations.

How should ventilation support animal welfare?

Ask a suitably qualified vet or building adviser to review the ventilation and space plan for the species, animal age, group size, season, stocking density and bedding system. Side, end or ridge openings should remove heat, moisture and stale air without causing draughts at animal height. Doorways alone may leave a long tunnel poorly ventilated.

For calves, the AHDB guidance on calf housing gives useful detail on clean air, humidity and stale-air removal. Other livestock need species-specific recommendations rather than the same opening sizes or stocking assumptions.

During daily checks, look for:

•            Condensation on the cover or frame

•            Ammonia odour or stale air

•            Panting and other signs of heat stress

•            Draughts around resting animals

•            Wet bedding or leaking water fittings

Correct the cause promptly and move feed or bedding away from persistent drips.

When should a polytunnel be recovered?

Plan to re-cover the polytunnel when the sheet shows widespread brittleness, repeated tears, poor tension or heavy frame abrasion. Small, isolated damage may be repairable, but extensive patching often means you should arrange replacement before winter.

With the old sheet removed, inspect the steelwork, replace damaged fixings, treat corrosion and smooth rough contact points. Review our polytunnel cover replacement service for material and installation choices.

For a priced quotation, submit the enquiry form with the tunnel width, length and height, hoop spacing, doorway sizes, fixing method, existing cover type, site postcode and clear photographs of both ends and side rails. State the livestock use and preferred delivery date.

We will respond within two working days and advise whether a site visit is needed. The quotation will itemise the frame or replacement sheet, fixings, delivery and installation where selected, so you can confirm responsibilities and costs before ordering.

Read More:

Installing a polytunnel in an exposed or windy location

How Long a Polytunnel Should Last