Materials & Options

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

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

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

Only a limited height difference can be compensated this way → the terrain should be levelled beforehand.

As the name suggests, this roof window is operated manually. This is done using the included operating bracket, which can be placed on the gutter in 2 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, roof windows can also be operated automatically using autonomous window openers that open based on ambient temperature. No electricity or batteries are needed.

The mechanism works through a hydraulic cylinder (with 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 that with changing wind direction, there is always a balance between incoming and outgoing airflow.

As standard, our second-hand greenhouses are fitted with second-hand clear horticultural glass. This glass may be somewhat dirty on delivery or installation and will need to be cleaned afterwards. HBS and HBS mini greenhouses are, by contrast, fitted as standard with new clear horticultural glass.

If the greenhouse receives a lot of sunlight, it is interesting to opt for hammered glass in the roof. Hammered glass is a type of diffuse glass that lets through less direct sunlight and scatters it in all directions, creating a better light distribution inside the greenhouse. Choosing hammered glass for the roof reduces the risk of plant scorching in summer.

In spring you need as much sunlight as possible in your greenhouse. However, the sun is quite low at that time, so most light enters through the side walls. For this reason, a combination of clear glass in the side walls with hammered glass in the roof is often the ideal choice.

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

• Hammered glass is less strong: hammered glass has a wave pattern. As a result, it is only 4mm thick at its thickest points and only approximately 3mm at its thinnest points, 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 on the roof of the greenhouse. To limit 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 heat treatment. This makes it not only 5 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 exact dimensions at the glass factory.