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Garden Polytunnels


Walk-in Cages
Low Fruit Cages
Vegetable Cages
Strawberry Cages
Fruit Cage Parts
Buy a Polytunnel
Polytunnel Accessories
Plant Support Netting
Runner Bean Frames
Compost Bins
Garden Netting
Pond Netting
Insect Netting
Windbreak & Shade Net
Ground Cover & Mulch
Poultry Netting
Game Bird Netting
Pest Control Nets
Aviary Netting
Golf  Practice Nets
Football Nets
Tennis Nets
Cricket Nets
Bargain Basement
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Select and Buy a Polytunnel
Why Buy a Polytunnel?
A Polytunnel can give you a Mediterranean or even Tropical climate right in your garden. Grow exotic fruit and vegetables and enjoy traditional fruit and vegetables out of season. Because a polytunnel encloses a larger volume of air than a greenhouse, a polytunnel stays warmer longer, providing a frost free environment for a greater proportion of the year. For an even longer growing season, bubble insulation can be used or the polytunnel can be heated. Another big advantage is shelter from wind and rain - for your plants and you! Polytunnel
Robust and Economical
Polytunnel door For the same price as a small greenhouse you can buy a large polytunnel. Polytunnels are also a safer alternative to glass houses. The polythene cover lasts 5 to 7 years and replacement covers generally cost about 20% of the complete polytunnel i.e. less than 4% of the tunnel price per year.
Tanalised timber posts are supplied for each end of the frame and the polythene cover is attached to these. Hinged steel doors are provided for each end.
Complete Polytunnel Kits from Knowle Nets
Supplied as a complete package consisting of steel frame, polythene cover, timber door frames, two hinged doors and full instructions. We supply 5 widths; 2.0m (6½ft), 2.5m (8ft), 3.0m (10ft), 3.5m (11½ft), 4.0m (13ft).
The Hoop is spacing 1.2m (4ft) for a strong frame.
The Framework
Polytunnel poles We use steel for the framework as this gives the strength required at an economical cost. The wind resistance of a Polytunnel is much higher than a Fruit Cage. We heavily galvanise the inside and the outside of the tubing to give it a long life. The main framework is 25mm (1 inch) diameter and the foundation tubes are 32mm (1¼ inches) with a polythene retensioning system. The hoops are spaced at 1.2m (4 feet) intervals, connected by tubes along the ridge. The four corners also have brace bars at a height of about 0.9m (3 ft).
Polythene Cover
Our standard cover is a heavy 150 micron Thermal polythene with UVI inhibitors giving a life expectancy of approximately 5 to 7 years. It has been designed specifically for the UK where low light levels are common. Light is transmission approximately 88%. As an option the cover can be upgraded to 180 micron UV blocking polythene which has all the advantages of our standard film but also blocks ultra violet light. The major advantage of this is for organic growers because it reduces Mildew, Botrytis and insect attack as insects only see in ultra violet. The frame is lined with 20mm wide anti hot spot tape which insulates the polythene from the steel tubing to give more even polythene wear, and extend the life of the polythene.

Polytunnel cover
Select and Buy a Polytunnel
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