The Greenhouse Project: Putting Up Posts

The Greenhouse Project: Putting Up Posts

Yesterday I promised you pictures of the greenhouse project so today here are a few. It doesn’t look like much here in the beginning but the work we did today was very important. Today my father and I put in the posts. Posts set in concrete was the best option for the shed-greenhouse idea that I wanted. Originally when I was thinking about building a shed I considered the pier idea. That works fine for shed but due to the amount of glass going into this and the fact that I wanted good drainage for inside the greenhouse I needed a porous surface like gravel.
Here’s what we accomplished on the greenhouse today:
  • Set nine 10 foot long 4×4 posts into the ground 18 inches with 6 inches of gravel below. I may have used more or less gravel per post depending upon what was needed get them level.
  • Leveled and aligned each post multiple times to make sure they were square plum and as perfect as possible!
  • Concreted a total of 560 pounds of concrete around the posts. (14 – 40 lb. bags)
Setting the posts correctly is the most important part of this project. Since everything rests upon these 9 pillars pressure treated lumber we took extra care with the alignment. When we completed our leveling, aligning and measuring we were 1/4″ off between the two sides. To me that’s pretty darn good!
You’ll notice in the pictures that there are several 2×4 cross bars tying the structure together. We used these to help hold the structure as we were setting and leveling the posts. We started with the right side by measuring and marking lines where the 2″x4″s should go. Then we attached the 2″x4″ pieces together across the 4″x4″ while they were laying on the ground. After that we raised the side and attacked braces. We did the same for the opposite side then hooked 12′ long 2″x4″ pieces to tie the sides together. All of this created the network of lumber you see in the picture.
The 2″x4″s will come down and be used for other parts of the greenhouse structure once the sides are framed together. Their main purpose was to enable us to get the posts leveled correctly. In the picture to the left you can see how we pieced the cross braces onto the 4″x4″ posts.
There’s a lot more to do (obviously) but I’m proud that the most important part was accomplished as well as it was. Having the structure as plum and square as it is will enable all the rest of our work to go better and (hopefully) faster!


Dave has written since 2007. He gardens on an acre and a half where he raises his 5 children. He enjoys growing vegetables, herbs, and propagating plants. Dave works as a real estate agent in Spring Hill, TN.

This Post Has 7 Comments

  1. Looks good Dave. I too will be happy to see the final project.

  2. dave, You must be very pleased with the progress you've made! Soon the cuttings and seedlings will have their home! gail

  3. This is the most important part and it looks great! Well done Dave and Dad! 🙂

  4. This looks great, Dave! Way to go!!! I love how you and your dad share projects at both homes. That must be really special!

  5. Getting it plumb and square is the MOST important thing and always the thing that is hardest. Can't wait to see it all as it looks very big.

  6. I am so excited for you! You will be so in love with a green house. Can't wait to see what you get done next!

  7. The building shows make this part look so easy, yet it isn't. Good for you to get it square and plumb. Given all your 'babies' that you have propagated, having a greenhouse is very important.

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