Help Me Choose


Cross-Country™ Greenhouses come in 6 DIY styles.

These kits come wood-crated and are curb side delivered to your location.

Kits come with clearly labelled parts and easy to follow DVD + written instructions for trouble free installation


Greenhouses are modular and constructed in two foot increments. Complete customization is available. Most popular sizes are 8x12 and 12x16 which are now feature items in our Specials section.


If the greenhouse is to be freestanding, think about placing it to the north of some deciduous trees, like maples and oaks. The trees drop their leaves in the autumn, allowing the full winter sun to shine in the greenhouse. Then, in the spring, the leaves grow out, providing shade to the greenhouse. Six hours or more sunlight should be available during the winter months.

Base / Foundation

For any greenhouse, you'll need a level, squared foundation. Foundations can be simple - ranging from a wooden frame to a constructed concrete base. Each type has pros and cons.

Concrete - durable, but draining must be considered. Also gives the greenhouse a more permanent look, allows for less movement, is easy to clean and will last for generations.

Wood - comparatively inexpensive as a foundation, but it will need regular treatment to prevent rot. Wood frames are simple and can be moved if necessary.


Locating your greenhouse closer to your house lets it benefit from any heat radiated from your house in winter. The closer it is to your home, the more convenient accessing it will be during bad weather. The type of glazing will affect the heating cost. ie: double glass or five wall polycarbonate will be more economical to heat.

Heating depends on the type of plants you are growing, the size of your greenhouse, the glazing and your climate. See heating options in accessories.

Glazing Systems

We offer four different glazing systems: single pane glass, tempered insulated double pane glass, twinwall polycarbonate, and fivewall polycarbonate. Our glazing options allow you to attain the best balance between insulating value, aesthetics, and economy to suit your needs. Generally, single glass and twinwall polycarbonate glazings are three-season greenhouses opposed to double glass and fivewall polycarbonate are four-season greenhouses.

Continuous, exterior capping system to secure the glazing and maintain the airtight seal. All glazing systems can be lined with polyethylene using plastic clips to increase heat insulation and reduce heating costs in the winter.
Our glazing options can be intermixed in the same greenhouse to add extra insulation and light diffusion where it is needed while maintaining aesthetic appeal and optimal visual effect where desired.

Glass vs. Polycarbonate
To simplify, the difference really comes down to "form over function". Glass is a traditional glazing used to beautify your yard that gives you the ability to control light transmission with external shading options. Polycarbonate offers built in shading, is maintenance free and virtually unbreakable. With LGS, you have the option of choosing a combination of glazing for your structure which includes single tempered glass, double glass, twinwall and fivewall polycarbonate.

Single Pane Glass:
Single glazing is one of the most economical glazing systems and makes for a nice show piece in your yard. All our single glass is tempered safety glass to minimize any possibility of breakage or injury. The traditional look appeals to greenhouse gardens with full light transmission capable of controlling their growing variable. Single pane glass is adequate for keeping a `cool greenhouse` in mild climates.

R value = 0.9.
Approximately 95% light transmission.

Double Pane Glass:
Double glaze insulated glass offers the gardener a spectacular view of plants and flowers while maintaining superb heat insulation for all types of growing. All our double glazed glass is tempered safety glass to minimize any possibility of breakage or injury. Insulated double glass is the best of both worlds, providing you with the aesthetically pleasing look of glass and the insulation you may require for your specialty plants.

Typical clear double glass R Value = 2.04
Approximately 90% light transmission

Double glaze glass can also be upgraded to a high-performance Low E glass to help keep the greenhouse even cooler in the summer and warmer in the winter while still maintaining the light necessary for plant growth. Other high performance options are available. Please contact us for more information.

Optional high performance Low E glass R Value = 3.3
Approximately 70% light transmission

Twinwall Polycarbonate:
Our 6mm twinwall polycarbonate is the most economical glazing materials. It is practical for a `growing greenhouse` as it offers 50% more insulation than single pane glass and diffuses harmful sunlight in the summer. It is essentially unbreakable, making it very safe in a family environment. The insulation will prevent the temperature in the greenhouse from changing drastically and results in the best possible growing environment.

R value = 1.59.
Approximately 82% light transmission.

Fivewall Polycarbonate:
We are pleased to introduce the most energy efficient covering available on standard greenhouses today. Our new 16mm fivewall polycarbonate offers unbeatable insulation which is 50% more insulating than double pane glass, or 80% more efficient than 6mm or 8mm twinwall polycarbonate. Fivewall is ideal for colder climates, gardeners who grow specialty plants, or for those who prefer the most energy efficient greenhouse to reduce heating costs

R value = 3.03.
Approximately 62% light transmission.