Glass Barn Cloches - History
The History of the Traditional Glass Barn Cloche
A British gardening tradition that has stood the test of time
Long before modern plastic tunnels, horticultural fleece and heated greenhouses became commonplace, gardeners and market growers relied on glass cloches to protect their crops and extend the growing season.
Among the most practical and distinctive designs was the traditional British barn cloche, often associated with the Chase design. Its simple but effective construction, using four flat panes of glass supported by a metal A-frame, provided a sheltered growing environment for vegetables, seedlings and young plants.
Although gardening technology has moved on considerably, this traditional design remains remarkably relevant to today's vegetable growers.
The origins of glass cloche gardening
The word cloche comes from the French word for bell, reflecting the early use of bell-shaped glass covers to protect individual plants.
Glass bell jars were widely used by gardeners to provide protection against cold weather, wind and frost. They worked particularly well for individual plants, but their shape and relatively small size limited their usefulness when protecting longer rows of vegetables.
As commercial market gardening developed, there was a growing need for larger and more practical plant protection systems.
The development of rectangular and framed glass cloches provided a solution. Rather than covering individual plants, these structures could protect a row of seedlings or a section of a vegetable bed.
The traditional Chase barn cloche
One of the best-known traditional British designs is the Chase-style barn cloche.
Its construction is deceptively simple. Four rectangular panes of glass are arranged around a metal A-frame, creating a protective structure with a distinctive pitched roof resembling a small barn.
The traditional metal frame is made from solid round steel bar and incorporates:
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Two sloping sides forming the A-frame.
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A ridge support handle running along the top.
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Two glazing clips to secure the glass panes.
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Four separate panes of glass, one on each side.
This arrangement provides a surprisingly strong and stable structure while allowing the cloche to be lifted and moved when necessary.
The four-pane design also has a practical advantage: individual panes can be replaced if damaged, without having to replace an entire cover.
The popularity of barn cloches after the Second World War
Glass barn cloches became increasingly popular with British market gardeners and serious vegetable growers during the period following the Second World War.
Food production was still an important national priority, and the Dig for Victory campaign had encouraged people to make greater use of their gardens and allotments to grow food.
For market gardeners, extending the growing season and protecting valuable crops could make a considerable difference to productivity.
Traditional barn cloches offered a relatively straightforward way to bring forward early crops, protect young plants and provide shelter from cold winds and adverse weather.
They were particularly useful for growing lettuce, carrots, radishes, early brassicas and other vegetables that benefited from a little additional warmth and protection. Fruit such a early strawberries and melons were firm favourites.
Unlike a permanent greenhouse, individual cloches could be moved around the garden as growing requirements changed.
Why glass was such an effective growing material
Glass became the preferred material for traditional cloches for several good reasons.
It allows high levels of natural light to reach plants, is relatively easy to clean and does not deteriorate in sunlight in the same way as many plastics.
Glass also has considerable longevity. Provided it is not broken, a pane can remain useful for many years.
The traditional four-pane barn design makes particularly good use of these properties. Its separate panes are relatively straightforward to source and replace, making it possible to maintain an old cloche rather than discard it.
Today, many gardeners still prefer glass because of its clarity, durability and traditional appearance.
Furthermore, glass outperforms standard polythene tunnels as Ggass reflects heat radiated from within the structure back inside.
The decline and survival of traditional cloches
Over time, lightweight plastic tunnels and modern horticultural covers became increasingly popular. They were inexpensive, easy to manufacture and convenient to transport.
As a result, traditional metal-framed glass cloches became less common in mainstream garden centres.
However, many original barn cloche frames survived.
Old frames could often be found stored in garden sheds, barns and outbuildings, or occasionally offered for sale second-hand.
Interestingly, the metal A-frames frequently survived even when the original glass had been broken or removed. Handles and glazing clips were also sometimes missing.
This left gardeners with a perfectly serviceable frame but no practical way to restore it to its original condition.
Restoring and maintaining traditional barn cloches
One of the advantages of the Chase barn design is that its relatively simple construction makes restoration possible.
Replacement glass can be obtained from a local glazier, cut to the appropriate dimensions. Missing handles and glazing clips can also be replaced. See Cloche Spare Parts page
For gardeners who have inherited an old barn cloche or discovered one in a shed, restoring the original frame can be a satisfying alternative to buying an entirely new growing structure.
It also helps preserve a small but interesting part of Britain's gardening heritage.
Traditional glass cloches are still useful today
Despite the availability of modern alternatives, traditional glass barn cloches continue to offer practical benefits.
They are particularly useful for:
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Protecting early vegetable seedlings.
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Encouraging earlier planting in spring.
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Providing shelter for salads and winter vegetables.
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Protecting young plants from cold winds.
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Extending the growing season.
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Creating a more favourable growing environment for crops in exposed gardens and allotments.
- Protection from pests.
They are also reusable year after year, with individual glass panes replaceable when necessary.
For gardeners who enjoy growing their own vegetables, a traditional barn cloche remains a useful and attractive piece of horticultural equipment.
Bringing the traditional barn cloche back to life
At Cloches.co.uk, we specialise in traditional Chase-style glass barn cloche metal frame kits, helping gardeners continue a long-established approach to vegetable growing.
Our range includes High Barn, Low Barn and Seedbed designs, retaining the traditional four-pane construction and practical metal A-frame.
We also supply replacement parts, including ridge handles and glazing clips, for gardeners looking to restore older cloche frames.
Our cloche kits are supplied as metal frames without glass, allowing customers to source appropriately sized glass locally.
We believe there is still a place for well-designed, traditional glass cloches in today's gardens and allotments.
A simple design, a long gardening heritage and a practical purpose: the traditional glass barn cloche remains as useful today as it was to generations of vegetable growers.
Visit www.cloches.co.uk to explore our traditional glass barn cloche kits and replacement parts.
🛒 Buy Traditional Barn Cloches in the UK
You can still buy traditional barn cloches today and glaze them using standard 3mm horticultural glass, making them a practical and long-lasting solution for modern gardening.