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7 Best Insulation for a Greenhouse

Who doesn’t want to insulate their greenhouse properly? Well, there are numerous ways to insulate a greenhouse, and using bubble plastic is the most convenient one. 

But what if we don’t find the proper insulation? You might be in a labyrinth to find the best option for you. I was in the same situation when I first bought insulation wraps. 

However, you don’t have to bear such hassle, mate. We have come up with the seven best greenhouse insulation. And you can choose any of them for your garden. But let’s have a quick glance at our chosen products first. 

Best-Of by Category

Category Product
Best Insulation for Energy Efficiency EcoFoil Bubble Insulation
Best Sealant Material for Insulation Flex Seal Spray Rubber Sealant Coating
Best Insulation for Plastic Greenhouses Greenhouse Clear Plastic Film Polyethylene Covering
Best Bubble Wrap Insulation Reflectix Bubble Pack Insulation

Best Insulation for a Greenhouse: A comprehensive Summary

In this comparison table, we come up with the available sizes, product weight, and compatibility. If you don’t have enough time, you can have a quick look from the table. 

Brand name DimensionWeight Best For
Uboxes18 x 18 x 24 inches2.5 poundsLarge greenhouse area coverage, kitchen
SmartSHIELD‎16 x 10 x 10 inches2.25 pounds Thermal greenhouse protection in winter, commercial use 
StarBoxes780 x 780 inches‎4.49 poundsHuge insulation of greenhouse, furniture wrap 
Guzheng39.3x 11.8x 11.8 inches 4.41 pounds Tomato greenhouse 
NASA TECH‎48.3 x 4 x 4 inches‎12.38 poundsCommercial grade greenhouse, Covering warehouses
‎US Energy Products48 x 15 x 15 inches‎16 poundsExpensive and premium Housewrap, industrial-grade 
Patelai4.02 x 3.66 x 1.73 inches0.29 pounds Repairing wires, insulating greenhouse 

1. uBoxes Large Bubble roll

uBoxes large Roll

Say hello to one of the best insulation bubble rolls for the greenhouse. This insulation roll has freaking multipurpose usage.

Along with the greenhouse insulation, it is suitable for kitchen and furniture wrap. What’s more, you can use it for packaging. 

I personally like its proper thickness and moisture-resistant capacity. The lowest U factor defines it as a highly energy-efficient material. 

You must be worried about the quality, right? Don’t bother about that, buddy. Ubox bubble roll has always made premium quality polyethylene materials. And this large-sized roll is no different. 

To be frank, I found the wrap installation to be an easy-peasy job. You can also install the wrap on a wood or aluminum base without hassle. That’s an impressive feature, isn’t it?  

Apart from these fantastic features, it comes in a 65 feet-long roll. We think it will give your greenhouse plants full coverage insulation. It is a perfect bubble wrap greenhouse insulation.


  • High-quality material
  • Versatile use: from greenhouse to kitchen
  • Larger bubbles for larger surface area
  • Affordable price


  • Sometimes flat bubble delivery

See Related: Best Greenhouse Paint

2. SmartSHIELD -3mm 16″x50Ft Reflective Insulation roll

SmartShield 3mm

Can you insulate a greenhouse in winter with a freaking easy product? Yup, it’s possible with a SmartShield 3mm

Do you know why? Because it is one of the thickest materials for greenhouse insulation. It is a 3 mm thick thermal insulation foil.  The thickness of this insulation roll will protect your greenhouse plants. The vapor resistance capacity will keep the average humidity inside the greenhouse

Furthermore, the commercial-grade insulation bubble wrap has a high-quality radiant barrier. It will support 97% radiant efficiency. 

Another interesting feature to me is its fire rate and non-toxic material. This is an awesome material to prevent allergic components.  After the cold months are gone, you can use it for roof insulating. However, it is better to detach it in the summer. 


  • Reflect up to 97% energy
  • Premium quality foam between aluminum foils
  • Nonallergic components 
  • Optimal for colder months


  • Not suitable for summer 

3. Bubble Cushioning Wrap Roll – 48″

Bubble Cushioning Wrap Roll - 48

Down the line, we have come up with an amazing Bubble cushioning wrap roll. It is whopping 48 inches wide and 65 feet long roll. Besides, you can use shade cloth to protect the greenhouse gases. 

Beyond the lightweight wrapping capacity, it has one or two inches of large and translucent bubbles. You will get the polycarbonate glazing at a low temperature. 

Thus, it keeps the greenhouse warm, ensuring protection from colder areas. The perforation capacity of the wrap roll is 12 inches. 

Bubble cushioning wrap roll has special features for winterizing the homes and protecting the greenhouses. Also, it will be suitable for wrapping furniture and kitchen appliances.

Thanks to the easy installation process. You don’t have to worry about installing this bubble. It is a suitable greenhouse bubble insulation for your large garden


  • Suitable for covering a larger area
  • Mediocre price
  • Comfortable installation 
  • Lightweight and optimal clarity


  • Average quality polyethylene 

See Related: Best Erosion Control Blankets to Buy

4. Gzhenh Greenhouse Kit Insulation

Gzhenh Greenhouse Kit Insulation

If you don’t have enough time to wrap the greenhouse, you can go with the ready-to-use greenhouse insulation kit. Do you know the most interesting thing about this kit? It’s perfect insulation for indoor use. 

Why do we call it ready to use? Well, you don’t have to prepare any separate sections for seedlings. It comes up with a quick installation foundation. Isn’t it amazing?

Moreover, it includes Polyvinyl Chloride wrap, 304 stainless steel base, PP greenhouse plastic fittings, and a thick plastic frame. It offers waterproof and UV resistant capacity, and it promotes plant growth

This insulation greenhouse frame kit provides a zipper system for any required air and light transmission. You have to keep it off while using it as a greenhouse. Besides, the feature ensures a great ventilation capacity for your individual plants like bonsai. 

Another interesting feature is that you can customize the size according to your requirement. Unfortunately, this is not suitable for larger greenhouses. 


  • Suitable for indoor use and smaller plants
  • Perfect Heat retention and ventilation
  • Easy portable and customizable 
  • Incredible zipper design


  • Small in size and limited use 

5. NASA TECH Radiant Barrier 

NASA TECH Radiant Barrier

Let us introduce you to the Nasa Tech insulation wrap. This reflective material will block 97% of radiant heat. It works better than the glass greenhouses.

Beyond that, it comes up with woven polyethylene scrim that ensures tear resistance. The 5 extra layer insulation foil roll offers good water vapor breathability. 

It protects your greenhouse from 83%  solar energy. The Department of Energy predicts it can save up to 45% of cooling costs.

You have to use heavy attachments or sealants to make it more durable. It will be suitable for the personal greenhouse area. 

Also, it helps to get rid of natural gas. Installing it in the late autumn will reduce your hassle. You will get tender plant growth using these wraps. 

This insulation can be perfect for any greenhouse foundation. Yet, you can use it for steel, aluminum, or wood. Moreover, it is the best nighttime insulation material for a greenhouse grower.


  • Can cover 500 square feet with one roll 
  • Aluminum foil material for durability
  • Prevent heat loss and keep the greenhouse warm
  • High efficiency. 


  • Moisture issues 

See Related: Greenhouse Costs Guide: Cost to Build, Own and Operate

6. US Energy Bubble Reflective Foil

US Energy Bubble Reflective Foil

We keep the bubble aluminum foil for greenhouse insulation on our sixth recommendation. If you are looking for a sustainable option with solar heat resistance, it will be perfect. 

US Energy produces good-quality horticultural bubble wrap for thermal insulation. Yet, it offers the barrier against Class A fire radiant, thermal, and vapor. You can use them as solar panels for the winter greenhouses.

The non-toxic formula of this material will help to reduce solar heat. Anyway, it has a metalized aluminum polyester film. This insulation roll is best for weatherstripping.

For this reason, the US Energy foam reflective is known as one of the most effective for insulating a greenhouse. You can use it to insulate the greenhouse floor. Besides, it is an excellent choice for climate change


  • Easy to install 
  • High thermal resistance power
  • Long-lasting 
  • User-friendly  
  • Perfect for heat loss 
  • A great choice for greenhouse roof


  • Not transparent 

7. Greenhouse Twist Clips Plastic

Greenhouse Twist Clips Plastic

You have to attach the greenhouse panels with the twist clips. Here we recommend the Greenhouse twist clips from Patella. 

Yet, it includes 50 pieces of clips in one package. You need to install one side of the clip into the hole and tighten it up from the other side. 

The size of these twist clips is 0.7 x 1.37 inches. Additionally, it is the best quality BPA-free plastic clip that provides high durability. 

These greenhouse clips help to keep the insulation together. With stability, it can last longer than other tools. 


  • Great-built quality 
  • Multipurpose use
  • Can attach to the cold frames
  • Suitable for all kinds of insularity 


  • Didn’t have any 

How to choose the best insulation for the greenhouse? Buying Guide in 2022

What if you are a newbie to greenhouse insulation? Well, I once didn’t know a thing of it. But years of familiarity with greenhouse has made me knowledgeable about this sector. 

From that personal knowledge, I would like to suggest that you probe into these factors before buying greenhouse bubble wrap. 

Insulation type 

The standard insulation types are double glazing, bubble wrapping, recycled plastic bottles, base cladding, thermal screens, and other methods. Double glazing requires glass and stainless steel construction. Moreover, the cheapest option for greenhouse insulation is recycled plastic bottles. 

You will need a greenhouse blanket or reflective silver foil wrap to build up the thermal screen. Of these types, the best one is bubble wrap acts. According to greenhouse experts, it has superior UV ray protection power.  Bubbles can ensure an excellent relief for you.


You need to check the sealant type before buying a greenhouse-insulating property. Nevertheless, the most popular insulation sealant is the silicone caulk. Other base sealant options are not as durable as this one. Sealant is necessary for making the insulation airtight. Thus, it helps grow plants. It reduces greenhouse gas emissions. 


Do you know why it is important to check the materials? Let us explain. You will need a sustainable material that can protect your greenhouse. You may find many materials for insulation, such as glass, bubble wrap, fabric, Polycarbonate foam, and heavy-duty plastic. 

However, it will depend on the place. Among all materials, heavy-duty plastic has the highest insulating quality. Beyond that, it is easy to clean.

Energy efficiency 

The important thing you should consider for insulation is energy efficiency. For this, check the U-factor, R factor, K factor, and last but not least, SGHC ratings. Remember to check the Energy Star approval. It will help you to know the solar heat and UV ray protection. It is also necessary for reducing heating costs. 


We know what you are thinking. How does thickness matter for insulation? Right? Well, it matters. Because if you choose ultra-thick insulation, it will deprive your greenhouse of light. In that case, it is better to select 0.15 for glass and 4 to more than 8 mm for horticultural bubble wrap. 

Resistance power 

Most of the insulating power comes with high-quality resistance power. You will require a waterproof and moisture resistant insulation quality. Alongside, the greenhouse will need protection against fading, rusting, solar heat, and UV rays. 

Final Thoughts 

So we have talked about the best insulation for the greenhouse. We try to include varieties of materials for your greenhouse. 

Now it’s up to you, buddy. You can purchase insulating kit material for keeping an ideal temperature and warmth in your greenhouse.

Frequently Asked Question

What is the best insulation for the greenhouse?

Bubble wrap is the best insulation for the greenhouse. Because it works better for light and solar heat. You can choose from some other options as well. 

How do you insulate a greenhouse for winter?

The first thing you have to do is prepare the tools and accessories. You will need the thickest material for winter. In that case, we suggest reflective foam material. After that, set up the foundation and wrap up with the base. Lastly, adjust the insulation with clips and sealant. 

How to insulate a plastic greenhouse?

Start with checking the greenhouse foundation. Take the horticultural bubble wrap for the best results. After that, wrap the base with the rolls. For making your greenhouse airtight, use silicone caulk sealant. Connect the bubble wrap edges with clips. Your plastic insulated greenhouse will be ready to use. 

How effective is bubble wrap insulation in a greenhouse?

Bubble wraps are great to use. Because they are transparent and won’t deprive your greenhouse of direct sunlight. But this insulation will protect it from solar heat. 

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