A Buyer's Guide to the Janssens Helios Master
The Janssens Helios Master range represents Belgian-engineered precision for serious UK gardeners. Built with premium box-section aluminium frames and full-length 4mm toughened glass as standard, these structures deliver commercial-grade durability.
This commitment to quality is backed by a 13-year manufacturer's warranty. Every greenhouse includes high eaves (2m / 6'7") for tall crops, multiple roof vents, a louvre vent, and integrated 40mm downpipes.
Helios Master: Hobby vs Victorian Comparison
The primary difference is aesthetic. Both share identical structural strength, 4mm glass, and a 13-year warranty. The Victorian model adds traditional roof cresting and a durable powder-coated finish.
| Feature | Helios Master Hobby | Helios Master Victorian |
|---|---|---|
| Frame Finish | Natural aluminium mill finish | Powder-coated Green or Black |
| Roof Style | Clean contemporary lines | Traditional cresting detail |
| Best For | Functional growing spaces | Garden focal points |
| Available Widths | 8ft and 10ft | 8ft and 10ft |
| Available Lengths | 10ft, 12ft, 15ft, 20ft | 10ft, 12ft, 15ft, 20ft |
Base & Assembly Guide
A perfectly level, solid foundation is essential to prevent structural stress and ensure smooth-running doors.
- DIY Base: A concrete slab or paving slab foundation is recommended. We've written a complete step-by-step guide on how to prepare your greenhouse base to help you get it right.
- Pro Assembly: Assembly takes 16-24 hours for two experienced DIYers. Our professional installation service can handle the full build for you, guaranteeing a perfect, square finish.
Frequently Asked Questions
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What's the main difference between Helios Master and other brands?
The frame. Helios Master uses high-strength box-section aluminium, which is measurably more rigid and storm-resistant than the standard U-channel frames found on many other greenhouses. You are investing in a structure built for extreme weather.
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Why is 4mm toughened glass standard?
It provides 15% better insulation than 3mm glass, maintaining warmer overnight temperatures. This can extend your growing season by 4-6 weeks compared to polycarbonate and offers superior safety and wind resistance.
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How do I add accessories like staging or extra vents?
On each product page, we list all compatible accessories. Simply select the staging, shelving, or automatic vent openers you need before adding the greenhouse to your basket. This ensures a perfect fit.
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Need more help choosing?
For a complete overview of all your options, from base preparation to ventilation, read our comprehensive greenhouse buyers guide.