Are polycarbonate greenhouses any good
Isabella Browning
Updated on April 16, 2026
Polycarbonate greenhouses are usually very reasonably priced, making greenhouses accessible to many people. Polycarbonate greenhouses offer 40% better insulation than glass greenhouses! Plastic greenhouses are durable. Polycarbonate is an extremely strong material and holds up well in different weather conditions.
What are the disadvantages of polycarbonate?
The main disadvantage of polycarbonate is that it isn’t resistant to scratches. For example, if a branch should happen to fall on a patio canopy made of polycarbonate, it may be scratched. This problem can be solved by polishing the polycarbonate.
How thick should polycarbonate be for a greenhouse?
As a rule of thumb, 8 mm and higher will do fine for any type of weather. If you don’t get many icy-cold nights or if you plan on heating your greenhouse throughout the cold season, you might be good with thinner panels. 4 mm thick panels are primarily used as a “season extender” not necessarily for year round growing.
Do plants grow under polycarbonate?
Rigid polymer panels, such as polycarbonate, have become the standard in greenhouse installation over the last few decades. … Plants grown in greenhouses with polycarbonate glazing are less likely to burn, but may not grow as full or fast as plants grown under glass since there is less available light to photosynthesize.Is polycarbonate roofing good for greenhouses?
SUNTUF Plus is a market leader for efficient greenhouse roofing around the world. Suntuf Plus promote ideal growing conditions for plants by maximising PAR light transmission and reducing light reflection and dripping caused by condensation.
How long will polycarbonate last?
Though polycarbonate is durable, it should be treated with UV protectant to prevent it from turning yellow or breaking down. With proper care, polycarbonate can last about 10 years, a fraction of how long glass lasts.
Does polycarbonate deteriorate?
What is PC, and What is it Used For? Polycarbonate (PC) plastics are a naturally transparent amorphous thermoplastic. … Polycarbonate also has very good heat resistance and can be combined with flame retardant materials without significant material degradation.
Is green or clear better for a greenhouse?
Is green or clear better for a greenhouse? Clear greenhouses are far more recommended than colored versions. Covering your greenhouse with a green (or another color) material will prevent some of the spectrums of the natural sunlight from penetrating the structure and finding your plants.What is the best type of greenhouse to buy?
- Freestanding – Square or rectangular freestanding greenhouses are great all rounders and can be sited anywhere in your garden. …
- Lean-to – Lean-to greenhouses take up less space, butting up to an existing wall of your house or garden.
Unlike acrylic though, the colour clarity of polycarbonate does diminish over time and will adopt a yellow hue with prolonged exposure to the UV rays.
Article first time published onWhat is the best type of polycarbonate for a greenhouse?
Types of Polycarbonate Lexan is a top rated polycarbonate that is commonly used for greenhouses. It is made in the USA, and it has two flat sides that are plain and transparent, giving it a similar appearance as glass.
Is 2mm acrylic OK for greenhouse?
Maximum sheet size3050mm x 2050mmAvailable thicknesses2mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mmLight transmission92%Fire ratingUK class 4 fire rating
What is the main downside to fiberglass greenhouses?
The downside of corrugated fiberglass is that it can be hard to clean, and the dirtier it gets, the less light it lets into the greenhouse. In general, fiberglass tends to not expand or contract in changing temperatures as much as other materials.
Can you heat a polycarbonate greenhouse?
If you want to heat the greenhouse during winter, a polycarbonate greenhouse is a good choice, given the insulation qualities it has.
Can you get sunburnt through polycarbonate?
Well, the answer is yes, you can certainly still get a suntan while gardening in a polytunnel that is covered with a standard or Thermal Anti Drip polythene cover. … Here at Premier Polytunnels we pride ourselves on offering the very highest quality of Thermal Anti Drip polythene – the preferred cover of UK growers.
Does polycarbonate degrade in sunlight?
However, bisphenol A polycarbonate is susceptible to photodegradation under ultraviolet (UV) radiation, which causes breakdown of the material, leading to yellowing, loss of toughness and embrittlement.
Does polycarbonate scratch easily?
Like acrylic, polycarbonate has some cons to consider. It is typically not a shiny material, but it can be polished. Although it resists cracking and chipping, it dents and scratches easily.
Which is better fiberglass or polycarbonate?
Polycarbonate is a strong, durable material that withstands the harsh conditions of the outdoors and ultimately lasts longer than fiberglass enclosures.
Does polycarbonate keep in heat?
Polycarbonate panels are resistant to heat, sunlight, snow and rain, meaning that they can last many years and provide a cost-effective solution for both domestic and commercial properties.
What is polycarbonate greenhouse?
A polycarbonate greenhouse will provide you with better insulation than a classic greenhouse. Plastic lets out less heat compared to glass, as it has better heat retention properties. Polycarbonate greenhouses are also more cost-effective, generally coming out at a cheaper price.
Which is better polycarbonate or PVC?
Polycarbonate is even stronger than PVC (apparently it’s almost impossible to break it, but we don’t want to tempt fate…). This means, of course, that it costs more. PVC has another advantage: polycarbonate can scratch, whereas PVC rarely does.
What is the best month to buy a greenhouse?
Without a shadow of a doubt the best time to be buying a greenhouse is in advance of the new growing season. Don’t wait until March or April when you see the first daffodil appear to place your order, get your order in well before then.
What is the best size for a greenhouse?
There’s no fixed benchmark on the size of a small greenhouse, but the most popular hobby greenhouse size is 6×8 ft. Even though we classify this as small, it still gives you plenty of space to move around. It will easily harbor a good amount of plants and vegetables in it.
Is a 6x4 greenhouse big enough?
Nicely proportioned, the 6×4 greenhouse has plenty of head space inside and because it’s 6 foot wide it has the benefit of a full sized door entrance too. Go for wood or aluminium, glass or polycarbonate, according to your needs and budget.
Is opaque plastic OK for greenhouse?
Translucent white greenhouse plastic will eliminate hot or cold spots by diffusing the light to provide for a consistent and steady temperature across the greenhouse. Some growers will use clear for the roof and opaque plastic sheeting for the sides.
Do plastic greenhouses work?
Plastic greenhouses generally help heat-loving plants to grow. This is because they retain warmth from being exposed to sunlight for long periods of the day. However, their effectiveness is not limited to full sun annuals or easy growing vegetables.
Does greenhouse plastic block UV rays?
The way most modern greenhouse plastic is made makes it resistant to UV light for the protection of the plants in the greenhouse and to help the plastic itself last longer while being exposed to sunlight. Most greenhouse plastics do block out UV rays.
How do you keep polycarbonate from turning yellow?
If possible, you can contact the polycarbonate manufacturer and request for a UV protection which suitable for polycarbonate sheets which can be used in your locality. Alternatively, you can consult a reputable dealer since he/she will help you to choose those polycarbonates with desired protection.
How do you clean yellowed polycarbonate?
DO # 1: Use a gentle detergent Clean polycarbonate gently using warm water with a few drops of liquid detergent and a microfibre cloth. Put plenty of water in your bucket so that you can rinse the cloth frequently.
How do you protect polycarbonate from ultraviolet?
Reputable polycarbonate manufacturers apply a very thin UV protective layer to the sheets. This layer is invisible to the naked eye and does not impact the physical and optical characteristics of the material.
What is the best thickness for greenhouse plastic?
When selecting a plastic greenhouse covering, you should choose a thickness of at least 6 mil. This is the benchmark standard set by the NCRS because it is meant to last 4 years or longer. There are other sizes available with more or less thickness, but 6 mil is the average thickness of a heavy-duty greenhouse film.