2100 model with 3 foot raised foundation/knee wall
Purchasing a greenhouse can be a difficult and sometimes an overwhelming process. The first things you should consider are location, foundation and of course your budget. All foundations should be level and square. A square and level foundation will save challenges later when installing your greenhouse. A raised foundation or knee wall is a good option if you want to add height to your greenhouse. Knee walls are commonly 12-48 inches high and can be made of various materials. If you would like a knee wall with your Sunglo greenhouse please notify us at 800-647-0606 to add a door drop kit to your order.
Below is some info about different foundation materials and a few basic tips to get you started-
Concrete is a great option for a foundation and often chosen among consumers because is it convenient. To attach your greenhouse to a concrete base we recommend attaching quality treated wood to the base of the greenhouse. 2 x 4’s will do.
Concrete foundation – Raised/knee wall
Measure twice before cutting your wood to ensure proper dimensions. We suggest allowing a 1” border around the outside of the entire greenhouse.
This is designed to allow a safe margin for irregularities in the wood plate. After the concrete has been poured and is level and square, a small drain should be placed in the center of the slab where water run off can drain into a gravel pit or piping that leads to a drainage area. The gravel, or if you wish to use stone, should be tightly compacted and we suggest covering it with 6mil. black plastic to create a vapor barrier. Then cover the vapor barrier with more stone or gravel. Then your greenhouse can be bolted to the foundation.
Having a wood base is easy and inexpensive. Cedar and redwood are commonly used. Pressure treated wood is also a great option but make sure to put a barrier between the wood and aluminum, such as gasket material, as the treated wood can cause the aluminum to rust. The size of your base will depend on the size of your greenhouse again allowing a 1” border around the outside of the greenhouse. After screwing the base boards together and making sure your ground is level, lay down a weed barrier. This allows the water to drain through but does not allow weeds to come up.
1000 model with Sunglo basic foundation suggestion
Pack the natural earth over the excess barrier. After your base is finished and the weed barrier is set underneath, you need to cover it. Gravel, sand or wood chips are common options. Use enough cover to fill the entire inner of your base leaving about an inch at the top. Now you’re ready to bolt your greenhouse to your base. For added insulation, we suggest you caulk the bottom of the aluminum where it meets the base with sealant. This will add extra protection to the greenhouse and keep cold air from entering and warm air from escaping in the colder months. For cosmetic appeal place a stone path down the length of the gravel that aligns with your door. This will give you a sturdy walking path and look beautiful!
If you are planning on purchasing a lean-to style greenhouse or even a small free-standing but only have room on your deck, that’s OK! Before attaching the greenhouse base to pressure treated wood lay down a thick rubber, insulated mat that is the dimension of the floor of your greenhouse.
1700 lean-to model on deck
There are various mats you can purchase that have colored designs to just plain old black. To attach the greenhouse base to the deck we recommend contacting your hardware store representative and explaining the situation. Decks are made of different materials and you wouldn’t want to ruin your deck in the process. Now insulation will be an issue as well. Depending on your style of deck please take this into consideration and do your research on what type of insulation, if any, you should use.
There is lots of info on the web about different foundations and step by step instructions on how to build them. I hope this gave you an idea of what you want to do with your foundation!
Sunglo offers a greenhouse foundations guide that shows how to build a easy, affordable and effective foundation base. To request a free-standing or lean-to foundation guide call us at 800-647-0606.
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For more advice about greenhouse foundations or general questions please e-mail us at email@example.com or call us at 1-800-647-0606.