What is Better to Build a Glass or Polycarbonate Greenhouses?

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Which is the Best Choice, of Greenhouse Building & Construction Planning, Glass Greenhouse Plans or Polycarbonate Greenhouses Plan?

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Post Category: Greenhouse Articles > Building Greenhouses > Greenhouse Components & Parts > Glass and Polycarbonate > Material and Cost Comparison

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Greenhouses are classically made from aluminum and glass, but recently, some people are substituting the glass for twin wall polycarbonate.

• The mega trend toward producing your own vegetables is leading more growers to experiment with different materials and expand beyond traditional options.
• Plastic greenhouse construction materials include fiberglass, polyethylene film, and polycarbonate.

Polycarbonate has numerous advantages over glass, including:

1. Greenhouse Insulation Ability:

Successful greenhouse plant growing is a matter of keeping the plants at the right temperature.

• Glass is not a very efficient material when it comes to heating, because it transmits heat and cold too rapidly.
• People have made use of glass’s difficulty retaining heat in other structures, from thermometers to spoons, but it is a disadvantage in other areas.
• Greenhouse glass panels are usually double or triple the normal thickness of glass to provide enough insulation, which can be problematic.

Polycarbonate

At the right thickness, polycarbonate sheets retain heat better than horticulture glass.

1. Polycarbonate sheets can lengthen the plants’ growing season, which can make all the difference in plant production.
2. Twin polycarbonate sheets are structurally similar to thermal windows, and provide a similar benefit.
3. They can reduce heating costs when compared to glass-paneled greenhouses, due to their greater heat retention abilities.

A material’s thermal insulation value is its ‘R’ value: Horticulture glass that’s three millimeters thick has a lower R-value than four-millimeter twin-wall polycarbonate sheets.

Single layer polycarbonate sheets have a reduced R-value compared to glass, so it is important to take grades and measurements into account, and not to substitute single layer polycarbonate sheets for twin layer polycarbonate sheets.

• A higher R-value can make all the difference for the plants, particularly when growing during the autumn and winter.
• The R-value will increase in proportion to the thickness of the twin panel polycarbonate walls.

 

2. Greenhouse Structural Durability:

Glass is famously fragile. 

1. Polycarbonate sheets can withstand far more pressure and shocks than glass, including fallen tree branches, hail, heavy storms, and the impact from incoming tennis balls.
2. Growers with nearby trees, active wildlife, or bustling neighbors may want to invest in polycarbonate sheets.
3. Twin polycarbonate sheets are also highly flame resistant, in case of emergencies.
4. On average, twin polycarbonate sheets last for fifteen years under ideal conditions.
5. Greenhouses made from glass require substantial repairs over the course of their own lifetimes.

 

3. Ease of Greenhouses Assembly:

Polycarbonate sheets are not as heavy as glass, and do not have to be cut specially to fit the greenhouse specifications. 

Glass is heavier than many other building materials, and needs the sort of significant framing structure polycarbonate sheets do not. Glass also must be kept completely rigid during construction. Often times, amateur growers cannot construct glass greenhouses themselves, and must procure the services of a contractor. Polycarbonate sheets are more conducive to individual assembly.

 

4. Internal Light Penetration:

There is a risk of burning plants when using glass-paneled greenhouses, because glass does not effectively diffuse light.

1. Polycarbonate sheets are constructed to have a ribbed texture that breaks ultraviolet rays.
2. The texture of polycarbonate sheets diffuses the incoming ultraviolet light, all the better for plant growth.
3. The diffused light minimizes shadow, so growers can take full advantage of incoming light and not have to compensate on behalf of the plants.
4. Some plant species need more or less light, and could be most efficiently grown in a greenhouse made from twin-walled polycarbonate.

 

Materials: Made with Glass

5. Reduction in Inside Greenhouses Condensation Levels:

Twin polycarbonate sheets have been tested in conditions of eighty percent humidity, with a fifty degree temperature differential between the outside and the inside of the greenhouse.

1. There was still no condensation on the greenhouse glass. 
2. Greenhouse condensation is more important in regards to aesthetics, but a buildup of moisture can still be problematic.

Greenhouse Materials: Made with Polycarbonate and Plastic Roof

Glass Greenhouse Panels: Materials

Glass Hot House: Sun-room Greenhouse Conservatory Elegant Style

Basic Hobby Greenhouse: Built with 6mm Twin Wall Polycarbonate Panels

EarthCare Greenhouses Brand: Basic Hobby Greenhouse 6' x 6' Kit w/ 4mm Polycarbonate

 

Growers can also take advantage of both materials, and get greenhouses constructed from a combination of glass and polycarbonate.

• Some growers still prefer glass greenhouses for sentimental reasons.
• Advances in materials science will create a portfolio of options for greenhouse growers and hobbyists.

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Greenhouse Articles & Reviews: HomePage Brought to You By: Mini Greenhouse Kits  

 

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How to Build Lean to Greenhouses FAQ

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Facts and Questions on How to Build Lean To Greenhouses

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Are you interested in building a greenhouse?

If so, then you should definitely consider a lean-to greenhouse!

Here are some Frequently Asked Questions (FAQs) about how to build lean to style greenhouses:

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1. What are lean-to greenhouses?

A lean-to greenhouse is connected to a bigger structure.

• The larger structure includes structures such as houses and garages.
  
• Such greenhouses can be either temporary or permanent, depending on their function.
• A grey area exists when classifying "bookshelf greenhouses."
• They're sometimes classified as lean-to greenhouses, although people don't always secure them to a larger structure.

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2. How large are lean-to greenhouses?

It depends. Some are small enough to fit onto a deck or patio. Other greenhouses are large enough to function as sun rooms, allowing people to enjoy nature while staying indoors.


One of the key benefits of mini lean-to greenhouses over other mini greenhouses is that they absorb heat from the adjacent structure, making them much more energy-efficient.

• This provides more insulation for your plants, and is particularly beneficial if you want to grow dainty flowers in a brutally cold climate.
• On the other hand, keep in mind that while smaller greenhouses are easier to set up, they require more maintenance than larger ones.

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3. Which materials are lean-to greenhouses constructed of?

Aluminum and wood are the most common ones for lean to greenhouse kits, although the majority are made of the former material.

• The main benefits of aluminum are the lower price and required maintenance.
• For many greenhouse enthusiasts, maintaining the greenhouse itself requires a ton of time and effort.

So should you automatically choose aluminum over wood?

• Before you do that, you should also consider the durability of hardwoods used to construct greenhouses.
• Treated quality wood is certainly a viable alternative to a aluminum lean to greenhouse. The key is to choose the right variety of hardwood.

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4. What are the pros and cons of full-size greenhouses?

Full-size lean-to greenhouses certainly provide some benefits.

For example, they're significantly steadier than their small counterparts.

• Also, the ample space creates a greater capacity for your greenhouse, and more options in terms of the plants' arrangement.
• Finally, ease-of-access is another benefit of full-size greenhouses, as one on the greenhouse's sides is attached to the house.

Still, full-size greenhouses aren't without their drawbacks.

• Since they're essentially add-on rooms to a house, they're quite pricey. If you're on a shoestring budget, then that factor could require you to choose a mini lean-to greenhouse instead.
  
• Secondly, the larger size of the greenhouses means that they'll require more maintenance. So if you're short on time, then a mini lean-to model might be a better option.

5. What types of vents do lean-to greenhouses have?

Proper ventilation is important in any greenhouse, ensuring that the right temperature and humidity are maintained in the greenhouse, it's vital you learn how to manage greenhouse humidity. The vents of a lean-to greenhouse can be either automatic, or manual.

• Automatic vents open whenever a fan is switched on, and close when the fan is switched off.
  
• Although automatic vents are certainly convenient, manual versions can also be a practical option for lean to greenhouses.
  
• That's particularly true if you're putting up your first lean to greenhouse, or you're on a tight budget.

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External Recommended Resources on How to Build A Greenhouse:

1. Tips for Building Smaller Greenhouses - http://www.laspilitas.com/garden/howto/greenhouse.html
2. How to Plan and Build Greenhouses Properly - http://www.wvu.edu/~agexten/hortcult/greenhou/building.htm
   
3. Greenhouse Facts Sheets - http://extension.umass.edu/floriculture/fact-sheets/greenhouse-management-engineering
4. Lean to Greenhouses Greenhouse Plans - http://lifestyle.ezinemark.com/greenhouse-plans-for-lean-to-greenhouses-7d2d98e88545.html
   
5. Building a Greenhouse: Choosing Materials - http://www.diygreenhouseplans.info/tutorials/building-a-greenhouse-choosing-materials-2/

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Conservatory mini greenhouse kits from FlowerHouses

Conservatory Mini Greenhouse Kits from Greenhouse FlowerHouses Garden Supplies

These conservatory mini greenhouse kits are manufactured by FlowerHouse Greenhouses, they are the perfect way to begin your home garden. Great for those with little available space! They all are equipped with a money back guarantee, check them out!

Conservatory FlowerHouse Greenhouse

The Conservatory Greenhouse kit is awesome, everyone that owns one falls in love with it in just a short period of time. I am thinking about buying myself one in the near future, they are a great addition to gardens. Not to mention they add thing certain look to your home making it extremely desirable and ultimately go up in value. I am not alone in loving this miniature greenhouse, many people of all ages and colors think this greenhouse is beautiful. It is made from FlowerHouse greenhouses so you know that it is high quality, it also comes with a 3 year warranty and free shipping! How much better could it get? I have no clue!

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Customer Greenhouse Reviews

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Official Conservatory Product Review Conclusion:

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The Flower House Conservatory green house model is an excellent buy, because of its excellent durability, portability, and is very spacious with an interior size ranging at 104" by 120" in diameter. Coming with a complete customer satisfaction guarantee and a limited three year manufacturers warranty, our staff feels that this is one of the safest greenhouses you can buy. Weighing in at 69 pounds, this product shipping costs will not be expensive even if you live outside of the United States.

Overall we have concluded that the team at FlowerHouse horticulture supplies, have created an excellent and efficient product that receives our two thumbs up recommendation.