Questions and Answers
Does the greenhouse need a specific foundation or can it be erected on a solidfoundation?
- Our greenhouses can be erected on any type of ground or foundation, if it is grass or soil we use anchors which are dug into the ground and concreted in, if it is solid foundation we use angle brackets and concrete bolts. Our only requirement is that the site needs to be more or less flat.
What’s the difference between 4mm and 6mm polycarbonate?
- 6mm polycarbonate is slightly more durable than 4mm and offers better heat retention. That said, 4mm polycarbonate is also a reliable and effective material with no major issues. We typically recommend 6mm polycarbonate for customers living near the coastline, in exposed or windy areas, or for those growing tropical plants or gardening through the winter with the use of heaters.
What’s the main difference between greenhouse Gamma and greenhouse Sigma ?
- The main difference between these two greenhouses lies in the frame design. The Gamma model features a profile-type frame with an internal support structure, which is ideal for installing shelves and hanging baskets. In contrast, the Sigma model has a 20mm x 40mm tubular frame without internal supports, providing an open, unobstructed interior space. Optional galvanized steel shelves are available for the Sigma. Additionally, the Sigma has slightly wider doors and windows. In terms of structural strength, both models are equally durable. However, the Sigma is generally a bit easier to assemble yourself. You can see a detailed comparison and demonstration of both models in this YouTube video:
What’s the best greenhouse model for very windy areas?
- All of our greenhouses are engineered to withstand extreme weather conditions. For particularly windy areas, we typically recommend the Gamma, Sky, and Sigma models. The best choice depends on your intended use and preferred greenhouse shape. From a technical standpoint, Sky is the most durable option, featuring slightly thicker and heavier frames for added strength. These greenhouses can be installed either on a solid foundation or directly into the ground using the included T-type anchors. The Gamma model are built with a profile-type frame and internal support structure, which allows for easy installation of shelves and hanging baskets. These models have been successfully installed in exposed areas near coastlines and in mountainous regions, consistently performing well under challenging conditions. The Flora-3 is also an exceptionally strong greenhouse. It features arches and anchors spaced every 1m—resulting in more steel and greater structural integrity. Its straight- wall design also allows for larger anchors, providing even more stability. Importantly, our greenhouses do not require a specific foundation and can be installed directly on grass. We dig holes for each anchor, and every anchor is concreted in place for maximum durability.
How do I keep my greenhouse clean?
- To clean your greenhouse, start by rinsing the exterior with a garden hose. Then, mix lukewarm water with mild soap or dishwashing liquid in a bucket. Using a soft brush—similar to what you use to wash a car—gently scrub the surfaces. Be careful not to damage the UV-protective layer on the panels. Once washed, rinse thoroughly with clean water. For the interior, you can follow the same method or use a pressure washer on a low setting. Avoid using too much force to prevent damaging the panels.
What direction should my greenhouse be facing ?
- There are two common opinions about the ideal orientation for a greenhouse. Professional gardeners often recommend positioning the greenhouse east to west, as this allows the sun to move across the entire structure throughout the day, promoting optimal plant growth. On the other hand, those concerned about wind and storm exposure may prefer a north to south orientation, as this allows prevailing westerly winds to hit the side of the greenhouse, improving wind flow and reducing resistance. However, our greenhouses are specifically designed to withstand harsh weather conditions. With anchors concreted in every meter, the structure remains stable regardless of its orientation. Our recommendation is to place your greenhouse in a sunny location, with easy access and a nearby water supply. The direction it faces is less important than ensuring it's in a practical, well-lit spot for your gardening needs.
How do you secure the greenhouse?
- The greenhouse comes with T-type anchors that are dug into the ground and concreted in, allowing it to be installed directly on grass—no special foundation is needed. The only requirement from our fitters is that the site must be reasonably flat and level. Once the greenhouse is assembled, you can lay down weed control fabric or cardboard, and then choose to build raised beds or add gravel for pathways and a clean finish.
Do I need additional windows for ventilation?
- We recommend starting without the roof windows and seeing how well you can maintain ventilation using just the doors and end wall windows. In some cases, roof windows can be vulnerable during strong storms. If you find that you do need additional ventilation later, we’re happy to come by and install them for you at any time.