Buy the wrong greenhouse and you either overpay for ornate styling you do not need or you replace flimsy panels in a few seasons. Canopia (Palram) and Exaco solve opposite problems. Canopia builds budget polycarbonate kits that snap together in a weekend; Exaco supplies premium German and Belgian greenhouses engineered to last a decade or more. Want long-term quality, real glass, and Victorian-to-modern designs? Exaco wins. Want the cheapest fast DIY route? Canopia. Here is how the two brands compare across ten points, with honest in-stock alternatives from our greenhouse lineup.
TL;DR: Exaco wins for durability, materials, and design variety, with German aluminum-and-glass greenhouses built to last 10-plus years (from $5,099 as of 2026). Canopia wins on price and easy DIY assembly with budget polycarbonate kits. Note: Canopia is currently out of stock here, so our in-stock budget-poly pick is the Riverstone MONT at $3,150.
Choose Exaco if you want a greenhouse that lasts a decade or more, value real tempered glass or thick triple-wall polycarbonate, garden in a cold climate, or want ornate Victorian or sleek modern styling that looks like permanent architecture.
Choose Canopia if your only goal is the lowest entry price and the fastest weekend build, you garden in a mild climate, and you accept thinner panels with a shorter service life.
One honest caveat up front: Canopia (a Palram brand) is currently out of stock at our store. We compare it fairly below as a brand, but if you want a budget polycarbonate greenhouse you can buy today, the in-stock pick is the Riverstone MONT at $3,150. See the “What We Carry” note near the end.
Canopia, a Palram brand, has focused on polycarbonate greenhouse kits for over 50 years and is a recognized expert in that single material. Exaco has been a leading importer for more than 25 years, partnering with the German Hoklartherm and Belgian Janssens manufacturers to bring well-engineered glass and aluminum greenhouses to North America. The table below scores both brands across the ten factors that decide most purchases.
| Aspect | Canopia | Exaco | Winner |
|---|---|---|---|
| Product types | Wide range of DIY polycarbonate kits | Glass and twin/triple-wall poly, German and Belgian | Tie |
| Materials | 4mm to 6mm polycarbonate panels | 4mm tempered glass, 8mm to 16mm poly, aluminum | Exaco |
| Design variety | A few core shapes, contemporary | Victorian, Orangerie, Modern, Riga | Exaco |
| Brand reputation | 50-plus years in polycarbonate | 25-plus years, German and Belgian engineering | Tie |
| Price | Budget-friendly, lower entry point | $5,099 to $16,999-plus, premium | Canopia |
| Assembly | Easy DIY, panels click together | More involved, foundation often needed | Canopia |
| Durability | Shorter service life on thin panels | Built to last 10-plus years | Exaco |
| Temperature control | Adequate, may need extras in cold | Superior insulation, cold-climate options | Exaco |
| Styling | Modern, minimalist | Ornate Victorian to sleek modern | Exaco |
| Warranty | 5 to 10 years, model-dependent | Up to 15-year frame on Riga and Victorian | Exaco |
Glass transmits about 90 percent of available light versus roughly 83 percent for polycarbonate, according to the Royal Horticultural Society, so Exaco’s glass models give light-hungry seedlings an edge. Now let us walk through each factor in detail.
Canopia’s lineup, the Mythos, Ivy, and Harmony series, is all polycarbonate panels that connect for easy assembly. Exaco partners with European makers to offer real glass greenhouses, thick twin-wall poly Riga models, and ornate Victorian designs that require fuller construction. Winner: Tie. Canopia gives more affordable plug-and-play kits; Exaco gives a wider range of materials and styles.
Canopia builds exclusively from polycarbonate, typically 4mm panels for the roof and 6mm for the sidewalls. Exaco spans 4mm tempered safety glass on its Janssens models and 8mm to 16mm twin- and triple-wall polycarbonate on its Hoklartherm Riga line, all on a corrosion-resistant aluminum frame. Glass transmits roughly 90 percent of light and reflects interior heat back inside, while polycarbonate transmits about 83 percent but holds heat well, per the Royal Horticultural Society. Winner: Exaco, for material diversity, light, and resistance to the warping and clouding thin panels show over time.
Canopia offers a handful of core shapes, mostly rectangular kits with a clean, contemporary look. Exaco ranges from English Victorian and T-shaped Orangerie styles through sloping-roof Modern designs to the practical Hoklartherm Riga arch. Winner: Exaco, whose catalog covers far more visual ground for buyers who want architecture, not just a kit.
Canopia, under Palram, has specialized in polycarbonate greenhouse panels for over 50 years and knows that material as well as anyone. Exaco has spent 25-plus years importing from Germany’s Hoklartherm and Belgium’s Janssens, makers known for precision engineering and TÜV and GS safety certification on the glass models. Winner: Tie. One is a deep budget-poly specialist; the other curates premium European engineering.
Canopia’s kits start at budget-friendly entry points well below Exaco’s range, which is why cost-driven buyers reach for it. Exaco sits in the premium segment: the Hoklartherm Riga 2S starts at $5,099, the Janssens Junior Victorian runs $7,999, and the largest Royal Victorian models reach $16,999 (all as of 2026). Winner: Canopia on sticker price, though Exaco delivers heavier materials and a longer service life for the money.
Canopia’s polycarbonate panels click together with screws and brackets, and most kits go up in one to two days as a DIY weekend project. Exaco’s models ask more: the glass Janssens units benefit from a prepared foundation and careful glazing, and a 6-inch foundation frame is available or included on several Riga and Royal Victorian units. Winner: Canopia for the fastest, simplest build; Exaco trades setup effort for a sturdier finished structure.
Canopia’s thin 4mm to 6mm polycarbonate is impact resistant out of the box, but thin panels are more prone to clouding, UV yellowing, and wind flex over the years. Exaco’s tempered glass and thick multi-wall polycarbonate on an aluminum frame are built to last 10-plus years with normal care, and aluminum resists the corrosion that degrades cheaper structures. Exaco backs this with frame warranties up to 15 years on its Riga and Victorian lines. Winner: Exaco, decisively, for a greenhouse that stays clear and sound for a decade or more.
Canopia’s polycarbonate insulates adequately for mild and temperate climates, though interior temperatures can swing in cold regions, often calling for added heating and ventilation. Exaco builds for harder winters: the Hoklartherm Riga XL 5 uses 16mm triple-wall polycarbonate, and several Janssens Royal Victorian models offer an optional 10mm triple-layer “X-Strong” poly upgrade for extreme cold. Both Exaco glazing routes hold temperature better than a thin single-wall panel. Winner: Exaco for cold-climate growers; mild-climate gardeners will be fine with Canopia.
Canopia leans modern and minimalist, integrating cleanly into contemporary backyards. Exaco offers the full range: ornate English Victorian greenhouses with graceful roof curves and finials, the elegant T-shaped Junior Orangerie, and the clean single-slope Modern M23. Winner: Exaco for curb appeal and a structure that doubles as a garden focal point; Canopia’s look is attractive but more utilitarian.
Canopia warranties vary by model, typically running 5 to 10 years. Exaco’s coverage is generally longer at the premium tier: Hoklartherm Riga greenhouses carry up to a 15-year frame warranty with 10 years on the polycarbonate, and the Janssens Victorian frames also carry a 15-year frame warranty.
Winner: Exaco. The longer frame coverage reflects the heavier materials and gives premium buyers more protection over the life of the structure.
Canopia, a Palram brand, is the answer when price and speed are your top two priorities. Its greenhouses use 4mm to 6mm polycarbonate that snaps onto a lightweight frame, so a determined homeowner can finish a build in a weekend without professional help. In mild climates, the panels insulate well enough for three-season growing and diffuse light evenly across your plants.
The trade-off is service life. Thin single-wall polycarbonate is more prone to clouding, UV yellowing, and flex in high wind than the thicker glazing Exaco uses, and the lighter frames suit calmer sites better than exposed or snowy ones. Canopia is a genuinely good fit for a temperate-climate hobbyist who wants to start growing cheaply and does not need the greenhouse to last 15 years. As noted, it is currently out of stock here, so the comparable in-stock option is below.
Exaco imports two premium European lines. The Belgian Janssens greenhouses use 4mm tempered safety glass on a powder-coated aluminum frame and carry TÜV and GS certification, while the German Hoklartherm Riga line uses 8mm to 16mm twin- and triple-wall polycarbonate built for snow and wind. Both are engineered to last 10-plus years and backed by frame warranties up to 15 years.
The Janssens Junior Victorian (79 to 97 sq ft, $7,999) delivers the classic English greenhouse look with a sliding door and integrated gutters, while the Hoklartherm Riga 2S (54 sq ft, $5,099) is a compact, heavily insulated workhorse with automatic roof venting and adjustable shelving. Yes, Exaco costs more and asks more at assembly, but you are buying a permanent garden structure rather than a kit you may replace. For most serious gardeners, that is the better long-term value.
The Exaco Janssens Junior Victorian at $7,999 (as of 2026) is the pick for ornate glass styling.
The Hoklartherm Riga 2S at $5,099 (as of 2026) is the insulated, cold-ready entry point into Exaco.
Cold-climate, year-round grower: Exaco. The Riga’s thick twin- and triple-wall polycarbonate and the Janssens triple-layer “X-Strong” glass upgrade hold heat through hard winters far better than thin single-wall panels.
Tight budget, mild climate, fast build: Canopia in principle, but since it is out of stock, the in-stock equivalent is the Riverstone MONT (below), which uses thicker 8mm twin-wall poly for a modest step up in quality.
Curb appeal and a permanent garden focal point: Exaco, every time. A Janssens Victorian or Orangerie reads as architecture; a budget kit reads as a kit.
Light-hungry seedlings and high-value crops: Exaco’s glass models, which transmit more light than any polycarbonate panel.
To be straight with you: Canopia (Palram) is currently out of stock at backyardoas.com, so we are not steering you to a product you cannot buy. Here is what we do carry, matched to the same two buyer types this comparison covers.
For premium, long-lasting quality, the full Exaco collection spans the German Hoklartherm Riga line and the Belgian Janssens Victorian, Orangerie, and Modern glass greenhouses, from $5,099 to $16,999-plus (as of 2026).
For the budget polycarbonate buyer who would have considered Canopia, our in-stock value pick is the Riverstone MONT.
The USA-made Riverstone MONT at $3,150 (as of 2026) uses a black powder-coated aluminum frame and 8mm twin-wall polycarbonate rated as an all-season structure, a meaningful step up in panel thickness from a typical budget kit. If you want to compare glazing types before deciding, our polycarbonate vs glass greenhouse guide breaks down the trade-offs, and the greenhouse buyer’s guide walks you through sizing, siting, and budget.
Both brands use functional door and window hardware, but the execution differs with the price tier. Canopia kits use lightweight sliding or hinged doors and manual or basic auto vents suited to DIY assembly. Exaco’s Janssens models add lockable sliding doors and integrated gutters, and many Hoklartherm Riga units include automatic roof vent openers and lockable doors. Hardware varies by model, so confirm the specifics on each product page.
Watch for seasonal sales and free-shipping promotions, which are common in the off-season fall and winter months. Many premium greenhouses also qualify for financing, which spreads the cost of an Exaco over several months. Because Canopia is currently out of stock here, the best in-stock value on a polycarbonate greenhouse is the Riverstone MONT at $3,150.
Frame reliability scales with material and thickness. Canopia’s lighter aluminum frames suit calmer, milder sites, while Exaco’s heavier powder-coated aluminum frames are engineered for snow and wind loads and carry frame warranties up to 15 years on the Riga and Victorian lines. For exposed, windy, or snowy sites, choose the heavier Exaco frame; for a sheltered mild-climate spot, a budget frame can be adequate.
Canopia and Exaco aim at different buyers, and the honest verdict favors Exaco for most people. Exaco wins on materials, durability, design variety, cold-climate performance, styling, and warranty, making it the choice for anyone who wants a greenhouse that lasts a decade or more and looks the part. Canopia wins on price and assembly speed for mild-climate hobbyists on a tight budget. Since Canopia is out of stock with us, browse our in-stock polycarbonate greenhouses for premium quality, or start with the Riverstone MONT if budget polycarbonate is your priority.
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