Materials & Options

This is our standard foundation and is our strongest and most high-quality option.

Prefabricated concrete posts and slabs with a plinth all around. At the door we provide a lowered threshold for easy access.

Specially developed to be placed on an existing concrete slab or hard surface (but can also be combined with concrete posts in open ground).

Only a limited height difference can be compensated this way — it is best to level the ground beforehand.

As the name suggests, this roof window is operated manually. This is done by placing the included operating bracket on the gutter rail in one of two positions.

Depending on the size of the greenhouse, a number of manual roof windows are included as standard in the purchase price.

As an option, it is also possible to operate the roof windows automatically using autonomous window openers that open based on the ambient temperature. No electricity or batteries are required.

The mechanism works via a hydraulic cylinder (containing biological oil): when the temperature rises, the pressure increases and a piston moves to open the window.

For the best possible air circulation in the greenhouse, we recommend always installing these automatic openers in pairs. This also ensures a constant balance between incoming and outgoing airflow when the wind direction changes.

As standard, our used greenhouses come with used clear horticultural glass. This glass may be somewhat dirty upon delivery or installation and will need to be cleaned afterwards. HBS and HBS mini greenhouses, on the other hand, are fitted as standard with new clear horticultural glass.

If the greenhouse receives a great deal of sunlight, it is worth considering hammered glass for the roof. Hammered glass is a type of diffuse glass that lets through less direct sunlight and scatters light in all directions, resulting in better light distribution inside the greenhouse. Choosing hammered glass for the roof reduces the risk of plants scorching in summer.

In spring, you need as much sunlight as possible in your greenhouse. At that time of year, however, the sun is relatively low, so most light enters through the side walls. A combination of clear glass in the side walls and hammered glass in the roof is therefore often an ideal choice.

If you prefer that neighbours or passers-by cannot see into the greenhouse, hammered glass in one or more side walls is a good solution.

• Hammered glass is less strong: hammered glass has an undulating surface. As a result, it is only 4mm thick at the thickest points and approximately 3mm at the thinnest, making it less strong than clear 4mm glass. For roof glass, toughened safety glass is therefore recommended.
• Trees nearby: in strong winds, branches, nuts, acorns, etc. can fall onto the roof of the greenhouse. To reduce the risk of damage, both clear and hammered glass can be specified as toughened safety glass.
• To reduce the risk of hail damage.
• Children playing near the greenhouse.

Toughened glass, also known as safety glass, owes its name and properties to an additional thermal treatment. This makes it not only up to five times stronger than standard float glass.

When it breaks, it shatters into thousands of small pieces rather than sharp shards, minimising the risk of serious injury.

Safety glass cannot be cut and must therefore always be produced to the exact dimensions at the glass factory.