There are a lot of greenhouses available; it can be pretty tough trying to decide which version will suit you best. Here are some of the major decisions you need to take into account.
The only downside of the greenhouse versatility listed above is that they can be a bit fussy about where they actually go. You’ll need to pick an area of your garden that gets plenty of light, but still has a little bit of protection from the wind. The greenhouse will also need to be kept away from any trees, as falling leaves will dirty the frame.
If you’re planning on heating the greenhouse electrically, then you’ll want to get it as close to the house as possible, as it will be cheaper to have the electricity installed. At least 2ft of access space around the greenhouse is usually necessary for cleaning and making repairs.
Finally, the greenhouse will of course require a tough, durable flat base – no putting it straight onto the soil! Paving slabs are the perfect choice, and they can be wetted in the summer in order to keep the air humid.
The most efficient heating solution for a greenhouse is an electric fan heater combined with a propagator and a thermostat. Bubble insulation also provides additional warmth at a lower cost. Whilst you don’t have to have additional heating, it’s nearly always useful, and it makes sense to plan for it in advance.
Whilst greenhouses are typically thought of as being just glass, modern models are actually now available in other materials, such as plastics and polycarbonates. There are pros and cons to all three. Glass is the clearest, and lets in the most light overall. It also lasts the longest and is the most easily replaceable in terms of single panels. Of course, the main downside is that it’s also the most breakable by some distance. Plastics and polycarbonates are far less likely to break, but don’t let light in as effectively as the glass. They’re often the more expensive options.
The other key thing to consider is that glazing will have different insulation properties, so some may be more suitable for some climates than others. Polycarbonate sheeting tends to insulate better so less heat will be lost from your greenhouse. This will be beneficial if your garden is in a particularly cool area.