Greenhouse Coverings

Glass

Glass is a traditional greenhouse covering used in a myriad of ways. Today’s glass products allow for wider bar spacing but can still withstand the required snow and wind loading.

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Glass rules in the rigid covering spectrum. Large-scale production operations growing ornamentals and produce often cover their greenhouses with glass because it is strong, easy to maintain, and has high light transmittance compared to other coverings. Glass glazing systems are also a popular option for storefront systems in garden centers.

Glass comes in many different types for greenhouse use, including:
• Floated
• Colored
• Low iron
• Tempered
• Anti-reflective (AR)
• Safety
• Diffused

As with the other coverings, the quality varies between the different types of glass, but for the most part, you can make glass perform the way you want it to for greenhouse production with the addition of additives and coatings. Today’s glass products allow for wider bar spacing but can still withstand the required snow and wind loading.

Uses for Glass Glazing:

  • Venlo-style greenhouses
  • A-Frame
  • Dual-Atrium greenhouses
  • Retail settings

Need Help Choosing the Right Glass Covering for Your Greenhouse?

At Prospiant, we specialize in greenhouse solutions and can recommend the best glass types, additives, and coatings for your needs. Contact us today to get expert advice and ensure your greenhouse performs at its best.

 

Highlights

  • High light transmission
  • Durability
  • Low thermal expansion and contraction
  • Long-lasting
  • Non-combustible

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The Impact of Curtain Systems on R-Value

Greenhouse covering or glazing has a big impact on your operational costs, even more so than the heat source you use. A simple solution is to add a curtain system.  

Keep in mind that the R-value of a greenhouse really comes from the curtain. Every time you add a curtain system you essentially double the insulative (R-value) of your greenhouse roof by creating an attic space above the curtain when it is closed. 

In some cases, when light costs more to supplement than heat or it makes more sense to allow more natural light into the greenhouse to speed up production, it may be prudent to select a covering for its high light transmission. Why? Because a curtain system can make up for the insulative value you lose. 

Most large-scale growers these days opt for the highest light-transmitting covering they can get away with for their climate, whether it is polycarbonate or single-layer poly in a warm climate, or glass for something different. Regardless of what climate they grow in, they know they can get away with this because they can use a shade curtain system as a heat blanket.  

Different additives and coatings can enhance the performance of the glass, making it more effective for growing.

The different additives in the glass can affect your crops’ color, shape, and growth.

Coatings on glass also boost performance. For example, anti-reflective coatings help more light get through by reducing reflection. This small improvement can add up because light is lost both when it enters and exits the glass.

There are other useful coatings too. Anti-condensate coatings spread out moisture in a thin layer, stopping it from building up. IR coatings block infrared rays, protecting your plants from getting too hot and burning.

When selecting a glass covering, be sure to ask your manufacturer or supplier what additives and coatings are available to you.

 

 

Commercial Brochure

Commercial Brochure

Overview of our offerings for commercial growing.

Retail Brochure

Retail Brochure

Overview of our greenhouse offerings for garden center retailers

Produce Brochure

Produce Brochure

Overview of our greenhouse offerings for produce growers.

Commercial Brochure

Commercial Brochure

Overview of our offerings for commercial growing.

Retail Brochure

Retail Brochure

Overview of our greenhouse offering for garden center retailers

Produce Brochure

Produce Brochure

Overview of our greenhouse offering for produce growers.