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Bio-Top greenhouse with twin-wall sheets in the garden
Bio-Top I2.15 m

Available in
various lengths
(grid 1.00m)

1.71 m

up to 150 kg/m²

Bio-Top II2.66 m1.71 m
Bio-Top III3.10 m1.84 m

A highly insulated greenhouse with sophisticated glazing technology and excellent stability. The Bio-Top model from Hoklartherm is suitable as a greenhouse for smaller gardens without compromising on luxurious details and appealing aesthetics. Thanks to the very robust roof construction (load-bearing capacity approximately 150 kg/m²), all Bio-Top greenhouses can be equipped with ISO safety glass in the roof area to withstand heavy snow loads. This will provide you with a high-quality and aesthetically pleasing greenhouse that you will enjoy for many years to come.

Twin-wall sheets Seal profiles and constructions Seal 40 Years warranty
  • Large standing wall height of 1.71 m
  • 16 mm thick glazing
  • No crossbars in the glazing panels (stable base construction)
  • Specially designed, particularly sturdy aluminium profiles
  •  Possibility of using real glass for glazing, including in the roof area
  • Lockable, divided swing door
  •  Large hanging shelves and a wide range of accessories available
Twin-wall sheets Seal profiles and constructions Seal 40 Years warranty


Bio-Top t-line in the garden
High-quality Bio-Top aluminium profiles

High-quality aluminium profiles

As greenhouse manufacturers, we develop our own high-quality aluminium profile systems that precisely meet the highest requirements. Our range now includes approximately 450 of our own profile cross-sections. The ridge, gutter, and base profiles are particularly important for stability. All load-bearing profiles are continuous, preventing weak points (leakage).

Bio-Top glazing

Glazing with real glass possible

Our high-quality profile systems have a high roof load capacity of up to 150 kg/m². Therefore, we can equip the Bio-Top series with 16 mm thick insulated glass in the roof area – for optimal light utilization and increased durability. Of course, we can also provide other types of glazing upon request.

HOKLAR Sun shading roller blinds

Aluminum capping bars

Instead of using plastic glazing clips, we use high-quality aluminium capping bars to hold the glazing in place. Unlike plastic capping bars, these do not rot or become porous – providing optimal support with excellent insulation properties. It is also easy to replace the panes if needed.

Installation of the BioTop T-Line side profile

Well thought out

All greenhouses from Hoklartherm have a modular system, making them easy to assemble using a step-by-step process. Windows and doors are already pre-installed. To ensure everything goes smoothly, all products undergo a strict quality control before delivery.

Rain gutter Bio-Top greenhouse

Efficient rain gutters

The Bio-Top is equipped with extensively tested, large rain gutters. This, in combination with a rainwater barrel, provides optimal conditions for an efficient water management.


Divided revolving door (standard)
Undivided revolving door or sliding door

Additional options:
Extra skylights
Partitions including divided revolving door
Opening window for side and rear panel 

Special colours available upon request

PC-twin-wall-sheets 16 mm, transparent
ISO safety glass / ISO glass 16 mm
Mixed glazing: Side ISO glass / Roof 16 mm ISO twin-wall-sheets

Additional visual highlights:
Additional decorative elements are available for an Old English flair. Our Bio-Top t-line greenhouse model offers even more nostalgia with a glazing grid of 0.5 m.

Bio-Top with decorative strip


Besides size, the material plays a crucial role in greenhouses. Specially developed aluminium profiles provide high load-bearing capacity – a crucial factor when it comes to safety and durability in many greenhouses. Upon request, we gladly customize our products to your preferences. For instance, you can opt for ISO safety glass: not only does this real glass meet the highest aesthetic demands, but it is also exceptionally stable and sustainable.

Röda Hus in the garden



A glass greenhouse like Bio-Top quickly becomes a haven of well-being and the centrepiece of the garden. Natascha from “roeda_hus” also experienced this. In mid-2023, we had the pleasure of enhancing her dream of a Swedish house with a Bio-Top greenhouse. With plants, as well as a cosy seating area, one can now comfortably unwind here. Find updates from her Bio-Top and fresh greenhouse decoration ideas from Natascha on Instagram at roeda_hus.



*Other special colours available on request


Your contact for the topic Greenhouses
Customer Service Jan Weber

Jan Weber

+49 4489 - 9281 - 16
You can reach me Monday-Friday from 7.00 a.m. to 6.00 p.m. and Saturday from 9.00 a.m. to 4.00 p.m.

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We will be happy to advise you:

As a passionate manufacturer, we have been producing garden ideas made of glass and metal in Apen for over 40 years. We want your garden to be your absolute favorite place where you feel at home at all times. That's why we are at your side from the initial consultation through to installation - for greenhouses, pavilions, conservatories and more.

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One product, many possibilities.
Wir setzen auf persönliche Beratung für lange Freude an Ihrem Gartenprojekt.

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Customer Service Jan Weber

I will be happy to advise you:

+49 4489 - 9281 - 16

Jan Weber

+49 4489 - 9281 - 16

You can reach me Monday-Friday from 7:00 to 18:00 o'clock and Saturday from 9:00 to 16:00.

You are also welcome to send us an e-mail to or book a consultation appointment.