1. Types of Greenhouses

3. Objectives
1. List and describe the different types of greenhouses on a quiz with 85 % accuracy.
2. List common framing materials used in greenhouses on a quiz with 90% accuracy.
3. Compare basic types of greenhouse coverings on a quiz with 80% accuracy.
4. Describe the uses of cold frames on a quiz with 80% accuracy.

4. Reasons To Learn Why are there different types of greenhouses?
Why do we need to know the different types of greenhouses?
Why are there different materials used to frame greenhouses?
Why are there different materials used to cover greenhouses?
Why do we need to understand what a cold frame or a hotbed is?

5. Questions To Answer What are some different styles of greenhouses?
What are some factors to consider when choosing a greenhouse?
What are some factors in choosing the framing material for a greenhouse?
What is glazing?
What is a cold frame?
What is a hotbed?

6. Lean-to Greenhouse Advantages Disadvantage Cheapest
Easier Instillation
More Obtainable
Space
Disadvantage
Limit Sunlight
Limited Plant Growth
Difficult to maintain temp
Limited Ventilation

7. Even Span Advantages Disadvantages Common Easy to find tables
Easy to heat and ventilate
Can add on to
Disadvantages
Expensive
More space needed

8. Uneven Span Advantages Disadvantages Can be built on hill sides
If constructed well can cut energy costs
Disadvantages
Difficult to find equipment for
Difficult to add on to

9. Quonset Advantage Disadvantage Easier installation
Low cost because of covering
Disadvantage
Appearance for home gardener
Allows for only inexpensive cover

10. Gothic Arch Advantages Disadvantages Inexpensive
Is good for shedding snow
More attractive
Disadvantages
Less head room
More difficult to build than Quonset

11. Ridge and Furrow Advantages Disadvantages Large capacity
Lower energy cost
Ability to diversify plants
Disadvantages
Area needed to build
Cost of building

12. Frame types Wood Steel Good Bad Good Bad Attractive Traditional
Expensive
Easily rotted
Heavy
Good
Strong
Inexpensive compared to aluminum or alloys
Can use galvanized
Bad
Very heavy
Rusts

13. Frame Types cont. Aluminum Alloys Good Bad Non corrosive
Low maintenance
Bad
Expensive
Lower retention of heat

14. Greenhouse Project Get into your groups.
Each group needs a poster board.
Discuss with your group what type of greenhouse your group wants to desgin
Each group needs choose

15. Greenhouse Glazing Polyethylene Glass Rigid structure sheets
Most common
Cheapest form of cover
Glass
Best light transmission
Most expensive
Rigid structure sheets
Expensive
High impact resistant
Weather resistant

16. Cold Frame vs. Hot Bed
Both used to protect small plants and seed protected from the weather.
Cold frame uses only sunlight for heat
Hot bed uses other sources for heat as well as sunlight