Siting your Garden Tunnel
Light and Shelter
You need as much light as possible so do not site Garden Tunnel directly under trees and hedges. Apart from shading your polytunnel, leaves will get onto the plastic covers and allow mould and lichen to take hold. If possible choose a south facing slope to maximise light levels.
Wind behaves like water. This means that if the wind is forced through narrower gap it will dramatically pick up speed. Therefore try to avoid siting the structure directly in front of a gate way or a gap in the hedge where the wind will be forced to accelerate.
A good sheltered site is valuable especially to protect the polytunnel from strong winds.
The diagram below illustrates the value of windbreaks to reduce the speed of wind and provide natural shelter for your polytunnnel.
Garden Tunnels are much more forgiving than a glasshouse and can be safely positioned on gently sloping land. There is no need for the ground to be levelled or paved first. The only important point is that if the ground has a slope it must be a consistent slope and not undulating.
There is often much discussion on whether polytunnels should run North to South or East to West. In reality, as long as the Garden Tunnel is not positioned on severe North facing slopes then the orientation is not critical.