Choosing a greenhouse is not just a question of size. The shape of the structure — its roof profile, internal height, width, and how the frame is put together — affects everything from how much you can grow to how you move around inside it to how it sits within your garden. Getting the shape right matters as much as getting the size right.
The KLASIKA and BALTIC LT range offers nine distinct greenhouse models across three structural families: arched, teardrop, and house-shaped. Each family has a characteristic internal geometry and aesthetic, and within each family, individual models differ in ways that matter practically — foundation skirt or not, arch spacing, extension module size, frame profile. This guide introduces all three families, explains what makes each one distinct, and walks through each model so you know exactly what you are looking at and who it suits.
All nine models share the same foundational quality: CE-certified galvanised steel frames with a 275gr/m² zinc coating, assembled with M5 screws, and glazed with Brett Martin twin-wall polycarbonate carrying a 10-year UV warranty. The differences are in form, dimension, and fit — not in the quality of materials or construction.
The three structural families
The arched family: tunnel profile, maximum space efficiency
The arched greenhouse is the most widely used profile in the KLASIKA and BALTIC LT range, and for good reason. The curved arch is structurally elegant — it distributes load efficiently across the frame, sheds rain and snow naturally from its curved surface, and encloses the maximum volume for a given amount of steel. It is also the profile that scales most naturally from compact to expansive, because the arch geometry remains effective whether the greenhouse is 2m or 10m long.
Internally, an arched greenhouse rises steeply from the ground to a central ridge, with the roof curving back down on each side. Headroom is excellent at the centre — all KLASIKA arched models provide at least 2.10m of clearance at the ridge — but tapers toward the sides as the curve descends. For most growing tasks this is entirely unproblematic: beds are typically positioned along the sides, where the lower headroom is of no consequence, and the central path runs along the full height of the ridge where you stand and work. The only situation where the taper matters is if you are training very tall plants against the side wall rather than upward toward the centre — in which case the teardrop or house-shaped profiles may suit you better.
The arched family covers five models across three widths: the KLASIKA SLIM at 2m, the BALTIC LT and KLASIKA ARCHED at 3m, and the KLASIKA TUBE and KLASIKA EASY also at 3m with their distinct square-tube frame profiles.
The teardrop family: maximum height, distinctive profile
The teardrop greenhouse — sometimes called a drop-shaped profile — takes the arch form and steepens and narrows it toward the apex, creating a profile that rises sharply from a wider base to a tight, pointed ridge. The result is the greatest internal headroom of any profile in the range: the STANDART KLASIKA reaches 2.45m at the ridge, the tallest model available.
The practical consequence of this profile is significant for growers of tall crops. Indeterminate tomato varieties — the cordon types that are trained upward on a single stem rather than allowed to bush out — routinely reach 1.8m to 2.2m in a full growing season. In a standard arched greenhouse, the ridge may start to constrain growth before the season is over, requiring the growing tip to be removed earlier than ideal. In a teardrop greenhouse, there is room to grow tall varieties to their natural extent without compromise.
The teardrop profile also has a distinctive visual character. The steep, pointed apex and curved lower sides create a shape that is more pronounced and purposeful-looking than a rounded arch — it reads as a serious growing structure and has a presence in the garden that suits kitchen garden settings and dedicated vegetable-growing areas particularly well.
Two models occupy the teardrop family: the STANDART KLASIKA and the KLASIKA DROP, both at 2.5m width.
The house-shaped family: full-height side walls, maximum internal usability
The house-shaped greenhouse abandons the curved arch entirely in favour of a pitched roof rising from near-vertical side walls. This is the profile that most closely resembles a traditional glasshouse in its geometry, and it delivers the most usable internal volume of any profile in the range.
The key advantage of vertical or near-vertical side walls is headroom at the edges. In an arched greenhouse, the side walls slope inward from ground level and headroom reduces quickly as you move toward the sides. In a house-shaped greenhouse, the walls rise almost vertically to eaves height before the pitched roof begins — which means you can stand upright, work at staging, or plant directly into beds right at the wall edge without stooping. For gardeners who spend significant time in their greenhouse, this is a genuine quality-of-life improvement.
The vertical walls also maximise the usable floor area. In an arched greenhouse, the corners of the floor plan are partly under low-sloping roof sections that limit their practical use. In a house-shaped greenhouse, the full rectangular footprint is accessible at working height, which means staging along the walls, beds running to the edges, and shelving near the walls all work naturally.
Two models make up the house-shaped family: the KLASIKA HOUSE and the KLASIKA BERNARD, both at 2.35m width.
The models in detail
KLASIKA SLIM — The compact specialist
Width: 2m | Ridge height: 2.10m | Profile: Arched
The KLASIKA SLIM is the smallest greenhouse in the range and the only 2m-wide model available. It exists to serve a specific and underserved need: the gardener who wants a real, quality greenhouse but genuinely does not have space for a standard-width structure.
At 2m wide, the internal growing area is focused rather than expansive. A single generous bed down one side with a narrow working path, or two slim beds with a central path between them — this is a greenhouse for growing a curated selection of crops rather than everything at once. What it does for that selection is everything a larger greenhouse does: extends the season meaningfully, protects against weather, maintains warmth through cold nights, and provides the controlled environment that transforms marginal outdoor crops into reliable producers.
The KLASIKA SLIM fits where no standard greenhouse will. A side passage between house and fence that measures just over 2m. A narrow strip at the end of a terrace garden. A compact urban backyard where every centimetre of footprint is spoken for. In these situations, the alternative to the SLIM is no greenhouse at all — and the SLIM is a very good greenhouse.
It starts at a 2m base length and extends in 2m modules. No foundation skirt — the arches drive directly into the ground, keeping installation simple. Arch spacing is 100cm.
This model suits: Urban gardeners, small garden owners, anyone with a specific narrow space to fill, first-time greenhouse buyers who want to start small and extend.
BALTIC LT — The range’s best price-to-growing-space ratio
Width: 3m | Ridge height: 2.10m | Profile: Arched
The BALTIC LT is consistently one of the most popular greenhouses in the entire KLASIKA and BALTIC LT range, and its popularity reflects a straightforward truth: it delivers the full benefit of a 3m-wide growing structure — the widest in the range — at the most accessible price point in that width category.
Three metres of internal width is the point at which a greenhouse becomes genuinely productive at scale. Two growing beds of around 90–100cm each, separated by a 70–80cm central path — this layout allows comfortable working access to both beds simultaneously and enough growing area to keep a household supplied with tomatoes, cucumbers, peppers, herbs, and salad crops through the season. Raised seedbed sets sized specifically for the 3m interior width fit exactly, making the most of the available space and bringing the added advantage of soil level management and cleaner growing conditions.
The BALTIC LT achieves its price-to-quality balance honestly. It does not include a foundation skirt — the arches drive directly into the ground at 35cm depth — which simplifies both manufacture and installation without compromising structural performance. Arch spacing is 100cm, wider than the more closely-spaced KLASIKA ARCHED, giving the interior a more open, airy feel while still providing a robust and stable structure. The frame is the same CE-certified galvanised steel used throughout the range; the polycarbonate is the same Brett Martin twin-wall with 10-year UV warranty.
For a buyer whose priority is maximising growing capacity within a sensible budget — someone who wants to grow seriously without the premium associated with the more fully-specified models — the BALTIC LT is the honest answer.
This model suits: First-time buyers who want serious growing capacity, gardeners placing the greenhouse on grass or open ground, buyers seeking the best value in the 3m width, anyone for whom foundation skirt is unnecessary.
KLASIKA ARCHED — The fully-specified 3m flagship
Width: 3m | Ridge height: 2.18m | Profile: Arched
The KLASIKA ARCHED is the most completely specified arched greenhouse in the range at 3m width. Where the BALTIC LT prioritises accessible pricing, the KLASIKA ARCHED prioritises structural completeness — a 10cm foundation skirt as standard, 67cm arch spacing for maximum rigidity, and an additional 8cm of ridge height that adds useful growing clearance for tall crops.
The foundation skirt is the most visible distinction. It runs the full perimeter of the greenhouse at ground level, providing a defined boundary between inside and outside, containing soil and preventing it from spreading beyond the beds, and offering a neat, finished edge to the greenhouse base. For buyers who want to create a deliberate internal floor arrangement — laying a gravel path, setting paving slabs, or simply having a clear edge to manage weeds against — the foundation skirt makes this straightforward.
The 67cm arch spacing — significantly closer than the BALTIC LT’s 100cm — contributes to a greenhouse that feels noticeably more solid and substantial. More support points along the length mean shorter unsupported panel spans, reduced flex under wind and snow load, and a frame that resists racking more effectively over time. In exposed positions, or for buyers who simply want the maximum structural confidence in their investment, the closer arch spacing is worth having.
At 2.18m, the ridge height also provides a more comfortable margin for very tall indeterminate tomatoes than the 2.10m of the BALTIC LT — a small but real benefit for growers who push their crops to maximum height.
This model suits: Buyers wanting the best-specified arched greenhouse at 3m, exposed garden positions, serious growers who want structural confidence and a defined base perimeter, gardens where the foundation skirt simplifies internal floor management.
KLASIKA TUBE — Square tube profile, KRAB connection system
Width: 3m | Ridge height: 2.18m | Profile: Square tube (20×20mm), KRAB system
The KLASIKA TUBE stands apart from every other model in the range through its frame construction. Where all other KLASIKA and BALTIC LT greenhouses use omega-profile steel sections — the pressed C-shaped profile standard in greenhouse construction — the KLASIKA TUBE is built from 20×20mm square-section steel tubes, connected using a dedicated KRAB clip system that allows the arch joints to be assembled quickly and securely without welding.
The structural characteristics of square tube are complementary to the omega profile in most respects: the clean, angular section resists bending effectively in all directions rather than predominantly in one, and the KRAB connection system produces visually clean joints without the fastener-heavy aesthetic of screwed omega profiles. The result is a greenhouse that looks noticeably different from the rest of the range — more angular, more contemporary, with a framework that has a clean industrial character rather than the softer appearance of curved pressed profiles.
Practically, the KLASIKA TUBE is a fully-specified 3m model: 10cm foundation skirt, 67cm arch spacing, and 2.18m ridge height match the KLASIKA ARCHED specification. This is not a model that trades structural completeness for visual distinction — it delivers both. The square tube with KRAB system simply offers a different frame aesthetic to gardeners for whom that choice matters.
The KRAB system also contributes to a relatively straightforward assembly experience despite the model’s full specification. The clip connections do not require welding or specialist tooling — the arches are assembled by connecting tube sections through the KRAB fitting and securing them, a process that is faster and more accessible than it might sound.
This model suits: Buyers who appreciate a contemporary, angular frame aesthetic, kitchen garden settings where the greenhouse is a visual feature, gardeners who want full KLASIKA ARCHED specification with a different frame character, buyers who find the KRAB assembly system appealing.
KLASIKA EASY — Maximum accessibility, full 3m width
Width: 3m | Ridge height: 2.10m | Profile: Square tube (20×20mm), quick-connect system
The KLASIKA EASY is the newest greenhouse in the range, and its name reflects its core design priority. Like the KLASIKA TUBE, it uses 20×20mm square steel tubes — but the connection system is designed specifically around speed and ease of assembly. Tubes connect using a fitting engineered for fast, tool-minimal joining without welding, making it the quickest greenhouse in the range to put together.
This matters for a specific and significant group of buyers: those who are building their greenhouse alone, those who have limited DIY experience and want a straightforward build, and those for whom the assembly process itself is a consideration rather than just a means to an end. The quality of the finished structure does not differ from the rest of the range — the steel is the same CE-certified galvanised specification, the Brett Martin polycarbonate panels are the same warranted product — but the path to getting there is more accessible.
The KLASIKA EASY does not include a foundation skirt, which keeps the installation process clean and uncomplicated. Arch spacing is 67cm — the same as the KLASIKA ARCHED and KLASIKA TUBE — providing good structural rigidity despite the quick-connect assembly method. At 2.10m ridge height, it matches the BALTIC LT rather than the KLASIKA ARCHED.
For buyers who want a quality 3m greenhouse with the simplest possible assembly experience, the KLASIKA EASY answers the question directly.
This model suits: Solo builders, buyers with limited assembly experience, anyone who prioritises a fast and accessible build process, buyers who want the 3m width without the foundation skirt.
STANDART KLASIKA — Maximum height, sunroofs as standard
Width: 2.5m | Ridge height: 2.45m | Profile: Arched (teardrop)
The STANDART KLASIKA is the tallest greenhouse in the range at 2.45m ridge height — and that height is its defining characteristic. If you grow indeterminate tomatoes on long cordon strings, cucumbers trained to significant height, or any crop where vertical growing space is a meaningful constraint, the STANDART KLASIKA removes that constraint entirely.
At 2.45m, there is room to train tomato plants to 2m or beyond without approaching the ridge. Side shoots can be removed, the main stem can continue upward, and the plant finishes the season — not the greenhouse ceiling — when growth concludes. For growers who have experienced the frustration of a productive plant running out of headroom in August, this is a tangible and season-long benefit.
The STANDART KLASIKA is also the only model in the range that includes sunroofs as standard — the number fitted depends on the greenhouse length, but they are incorporated from the outset rather than being optional additions. Sunroofs provide roof-level ventilation at the highest point of the greenhouse interior, where warm air accumulates, and they work with or without automatic wax-cylinder openers. Their inclusion as standard on the STANDART KLASIKA reflects the fact that a taller greenhouse with more enclosed volume needs proportionally more active ventilation management in summer.
A 10cm foundation skirt is included, arch spacing is 67cm, and the base starts at either 2m or 4m with 2m extension modules.
This model suits: Growers of tall indeterminate tomatoes and cucumbers, buyers who want the maximum internal headroom in the range, gardeners who want sunroofs included from the outset, anyone for whom growing height is a genuine consideration.
KLASIKA DROP — Teardrop profile at an accessible price
Width: 2.5m | Profile: Arched (teardrop)
The KLASIKA DROP occupies the same profile family as the STANDART KLASIKA — the same teardrop shape, the same distinctive steep-sided arch rising to a narrow apex — but positions itself as the more accessible entry point to that profile type.
It does not include a foundation skirt, and sunroofs are available as optional additions rather than standard inclusions. Arch spacing is wider at 100cm, giving the interior a more open feel. This configuration suits buyers who want the teardrop profile — its height advantage and its visual character — without the full specification of the STANDART KLASIKA, and who are managing their own base arrangement.
The KLASIKA DROP is an economic greenhouse in the most honest sense: it is designed for those who are looking for not only durability but also a distinctive shape and height at a sensible price. The core quality remains consistent — CE-certified steel, Brett Martin polycarbonate — but the fittings are appropriately simplified.
This model suits: Buyers who want the teardrop profile without the full STANDART KLASIKA specification, gardeners placing the greenhouse on an existing hard surface, value-conscious buyers who prefer the teardrop aesthetic.
KLASIKA HOUSE — Full-height sides, maximum internal usability
Width: 2.35m | Ridge height: 2.35m | Profile: House-shaped
The KLASIKA HOUSE is the greenhouse to choose when internal usability matters as much as growing capacity. Its house-shaped profile — near-vertical side walls rising to a pitched roof — ensures that the full width of the greenhouse is accessible at working height. There is no tapering at the sides, no crouching to reach edge beds, no wasted floor area under a sloping arch. You can stand and work comfortably at any point across the full 2.35m width.
For gardeners who spend significant time in their greenhouse — potting, pruning, harvesting, managing seedlings — this full-height internal space changes how the greenhouse feels to use. It is a more genuinely room-like environment than a tunnel profile, and for anyone who has spent a season working in a curved-arch greenhouse and found themselves slightly hunched at the edges, the difference is immediately apparent.
The KLASIKA HOUSE includes a 10cm foundation skirt, has the tightest arch spacing in the range at 50cm, and starts at either a 2.12m or 3.17m base length with 2m extension modules. The 50cm arch spacing gives this model a solid, substantial character — the frame is densely-ribbed in a way that reads as serious and well-engineered, and contributes to excellent structural rigidity. The base length flexibility at the starting point is useful for gardens where the available space does not fit a 2m increment neatly.
This model suits: Gardeners who value full-height access across the whole internal width, kitchen garden and formal garden settings, buyers who want the traditional glasshouse aesthetic in polycarbonate, anyone who prioritises internal working comfort.
KLASIKA BERNARD — House profile with 1m extension flexibility
Width: 2.35m | Ridge height: 2.35m | Profile: House-shaped
The KLASIKA BERNARD shares its essential character with the KLASIKA HOUSE — the same 2.35m width, the same 2.35m ridge height, the same house-shaped profile with its full-width accessible interior — but differs in two ways that are practically significant for certain buyers.
First, it does not include a foundation skirt. For buyers placing the greenhouse on an existing hard surface — a prepared concrete base, existing paving, or a patio area — this is the more appropriate configuration. The skirt adds no value when the greenhouse sits on a hard base, and its absence keeps installation clean and the structure easier to reposition if your garden arrangement changes.
Second, and distinctively, the KLASIKA BERNARD uses 1m extension modules rather than the 2m modules standard across the rest of the range. This is the only model in the entire KLASIKA and BALTIC LT range with this capability, and it opens up length options that are simply not available elsewhere: a 3m greenhouse, a 5m greenhouse, a 7m greenhouse, or any odd-metre length you need.
For buyers whose available space falls between standard 2m increments — a measured plot of 5.4m, for example, where a 4m greenhouse would be too short and a 6m too long — the KLASIKA BERNARD’s 1m module is the solution. It is also the right choice for buyers who plan to extend their greenhouse gradually and want the maximum flexibility in how they do so, adding 1m at a time as ambition and budget allow.
Arch spacing is 99cm — similar to the 100cm of the wider-spaced arched models — giving the interior an open, airy feel at 2.35m width.
This model suits: Buyers with plot lengths that don’t fit 2m increments, gardeners who want maximum extension flexibility, buyers placing the greenhouse on a hard base, anyone who appreciates the house profile without a foundation skirt.
Choosing between models: the quick reference
If the detailed model descriptions above are more than you need right now, this summary maps the most common buying situations to the right model directly.
Tight space, compact garden: KLASIKA SLIM (2m wide — the only option if your space constrains you to this width).
Best growing capacity for the money: BALTIC LT (3m wide, no foundation skirt, accessible price, serious growing space).
Best-specified arched greenhouse: KLASIKA ARCHED (3m wide, foundation skirt, 67cm arch spacing, maximum structural rigidity).
Maximum headroom for tall crops: STANDART KLASIKA (2.5m wide, 2.45m ridge height, sunroofs included, the tallest model in the range).
Maximum internal usability, full-height sides: KLASIKA HOUSE (2.35m wide, vertical side walls, 50cm arch spacing, foundation skirt, traditional glasshouse character).
Flexible extension in 1m steps: KLASIKA BERNARD (2.35m wide, house profile, 1m modules, no foundation skirt, any odd-metre length possible).
Contemporary square tube aesthetic: KLASIKA TUBE (3m wide, 20×20mm square tube with KRAB system, full specification, clean angular character).
Simplest assembly experience: KLASIKA EASY (3m wide, square tube with quick-connect system, no foundation skirt, tool-minimal build).
Teardrop profile at the accessible price: KLASIKA DROP (2.5m wide, teardrop profile, no foundation skirt, 100cm arch spacing).
A note on extensions and planning ahead
Every greenhouse in the range is designed to grow with you. All models start at a base length — typically 2m or 4m — and accept extension modules that bolt onto the existing structure to increase length incrementally. Width, once chosen, is fixed — only length can be extended.
This modularity is one of the most buyer-friendly aspects of the range, because it means you do not have to predict your growing ambitions perfectly at the point of purchase. Start with what you need now. Extend when you are ready.
The one decision that cannot be revisited is width. A 2m-wide KLASIKA SLIM cannot become a 3m BALTIC LT. A 2.35m KLASIKA HOUSE cannot become a 3m KLASIKA ARCHED. Choose your width based on the space you have and the growing scale you are genuinely aiming for — and if you are in doubt, read the advice in Which greenhouse is right for me? before you finalise your decision.
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