Having chosen your polytunnel kit, you now know the width, length and the number of hoops
ASSEMBLY METHODS – Polythene
This is the most popular method as no additional material cost is involved.
The weight of the soil keeps the polythene in place. .A Trench is dug at least a spade deep and a foot wide all around the polytunnel except for the doorway entrance each width end. The polythene is laid in the trench and the dug out soil placed back in the trench, so keeping the polythene covered
Base Rail Method
You may prefer to use a Timber Base Rail rather than digging a trench for the polythene. Metal fixings are supplied by Five Star Polytunnels. Ground tubes are concreted in, or Anchor plates used.
A Base Rail Set comprises metal fixings of a P-clip and bolt and nut that is positioned on each ground tube, with one extra fixing for each corner ground tube. A Timber Base Rail holds the polythene all round your polytunnel. The Rail comprises tannalised timber, battens, and the metal fixings
ASSEMBLY METHODS – Kit
Anchor Plates – instead of concrete
Anchor Plates are an alternative to concrete, and used to hold each Ground tube
Five Star Polytunnels supply a square heavy duty metal anchor plate with two fixings for each ground tube. Each ground tube has to have an anchor plate. The ground tube goes through the centre of the anchor plate and is fixed in place with clips either side, a few inches above the lower end of the ground tube. Each ground tube with its own anchor plate is installed at the required equidistant intervals
Base Plate – No Ground tubes
Base Plates are chosen for a concrete base i.e. where no soil is being used
A Base Plate comprises an L shaped plate with a holder and four holes for bolt and nuts. Two holes are for the timber base rail and two for the concrete fixing
The plate is positioned on each hoop end, so Ground tubes are not required.
A Base Rail is used to hold the polythene all round the polytunnel. The base rail comprises tannalised timber and battens. Each Base Plate is bolted to the concrete base with “Rawl bolts” (or similar) once the polytunnel structure is fully assembled