Selecting A Greenhouse
Glazing
The material that covers a
greenhouse and through which the sunlight passes is called glazing.
There are many types available, each with advantages and disadvantages.
These include glass, acrylic, polycarbonate panels, polyethylene
films, and fiberglass. If you're building, buying, or reconstructing
a greenhouse, you'll want to talk with experts and manufacturers
about the pros, cons, and costs of various materials. As you review
your options, be aware of these general considerations:
- Light transmission and energy efficiency—The
degree to which glazing allows light energy to enter and
prevents the heat from leaving is known as its efficiency.
This is affected by thickness, number of layers, and type
of material.
- Life span—Plastic
glazing can last from 1 to 20 years, depending on the type
and treatment of the materials.
- Special treatments—Some
greenhouse glazing is designed to be especially effective
at trapping heat. Some is treated so it is antistatic (attracting
less dust and preventing condensation from forming on the
inside surface). Some types of glazing diffuse and reflect
the incoming light to reduce shadows.
- Safety—Some types
of glazing are flammable; others, like glass, are breakable.
- Hail resistance—Hail
can batter your greenhouse and your hopes, so select a glazing
that can withstand an onslaught if severe hail is likely
in your region. A rigid type of glazing would be best under
these conditions.
© 2008
National Gardening Association