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How to Make a DIY Greenhouse



We helped Josh’s wife make a DIY Greenhouse with help from Lowe’s. It was a fun & challenging build, but Lowe’s is the perfect partner to help you finish your fall projects and
get back to enjoying what matters. Look below for everything we used in this project!
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Josh’s wife is really into gardening and planting beautiful greenery leading to her desire for a greenhouse. This way, she can keep her plants alive during the winter months and incubate some new plants so they’re ready for the spring.

Josh began the design with a 3d model in Fusion 360. We got our bill of materials and the cut list then headed to our local Lowe’s to get the supplies to begin framing the structure. I chose to use pressure treated lumber for this exterior addition to resist the moisture and humidity that may build up inside the greenhouse. Using Josh’s measurements, we nailed together the floor and added the front and back wall studs.

Before adding a structure to your yard, you may chose to grate and level the area beforehand. Josh didn’t want to tear up the yard, and here in Kentucky, the clay is super hard. In lieu of digging into the ground to level it, we chose to level the floor frame by adding 2×4 posts semi-driven into the ground. This way, Josh and i could level the floor and nail it to those posts along the span of the greenhouse. Now that we had a level surface to work from, we continued to build out the frame by connecting the front and back studs and then connecting those two walls with some ceiling joists.

For the greenhouse floor, Josh wanted something that could resist any standing water that would fall down from the plants. We found some engineered siding panels at Lowe’s that are weather-resistant and come in large, 4′ x 8′ sheets. These panels are only 3/8″ thick, so we added another layer of pressure treated 1/2″ plywood to ensure the floor was strong enough to walk on. We fit three of these double-layered panels on top of the floor frame, making sure to cut around the wall studs and secured them with screws.

For the greenhouse’s exterior, it is possible to simply cover the bare frame with the clear polycarbonate sheets, but because of this greenhouse’s size, that would take more than the 10 panels we allotted for this project. We had to order the sheets from Lowes.com and the came in a pack of 10. So rather than sacrificing the size of the greenhouse, Josh got creative and added a decorative element to the outside that helped use less polycarbonate.

We decided to use the cutoffs of the engineered, exterior sheeting to make a skirting of wood panels that wrapped around the greenhouse. To cover any seams and to give the element some definition, Josh cut up some 1×4 trim pieces that really set the decorative element apart. It looked really nice and flowed super well with the overall design. Again, these step is optional, but it does look fantastic and it helps save on the more expensive material later.

At this point in the project, we have a nice looking frame of a greenhouse. To make it functional as a greenhouse, we need a way to trap the radiant heat from the sun inside the structure. We found many ways to do this from using reclaimed windows, rolls of plastic tarp pulled tight, glass panes, and sheets of acrylic.

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#greenhouse #diy #how-to

Written by Yaipoo

Comments

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  1. Answer to common comments:
    1. The 2×4 legs won't settle much here. Our red clay doesn't move much once it's settled, and this is a high point of the yard so it drains well and never gets saturated.
    2. All wood was pressure treated, rated for ground contact, so rot is many, many years away.
    3. There is a small air gap between the walls and the side of the house.
    4. The garage (not temperature controlled) is on the other side of that exterior wall.

  2. Why not go 2’ on center on the floor deck and then use 3/4” or 1-1/8” floor decking?

    The added cost of pre-treated plywood, the additional treated 2x and the floor decking could have been lowered a little, maybe?

  3. I may be wrong here, but I think the white sheet that came on the plastic will also help diffuse reflected sunlight. Depending on a number of factors, some plastic sheets will reflect light in a way that can actually melt vinyl siding.

  4. lovw that project, would be nice later to make automatic system to let hot air out and air in 😛 and a water pump system, maybe in the future 🙂 loved the greenhouse 🙂

  5. why don't you actually build anything correctly? why would lowes sponsor this? Put that on a rock base under four or six deck blocks and you're done. jeeesus.

  6. I don't mean to be too myopic here, 
    but there was a split second shot where it was clear one of your cuticles was def 'less trimmed looking' than the one on your other hand?
    Do you really care so little for your audience that you need to subject them to your disgustingly poor grooming habits?
    If you make free videos, why do I still have questions? I mean, like- do your job, man!
    Not to blow this out of proportion, Bob, but why are you Adolf Hitler?

  7. ahaha… you don't live in an area with a lot of snow, do you? I would love to make a greenhouse one day, but this would surely get ruined within the first winter-storm here ^^;

  8. Je regarde des vidéos de ce genre pour le savoir faire des opérateurs, mais je déteste le fait que ces opérateurs soient sponsorisés par des marques d' outillages. En effet, il y a presque toujours des outils neufs, des ateliers impeccablement propres, les bricoleurs habillés en neuf et qui ne se salissent jamais, bref, ce n' est qu' une pub pour des marques ! De plus, sur certaines vidéos, les gens parlent trop longtemps et on ne voit que peu leur façon de faire. Je suis un râleur, je sais et je me fais avoir à chaque fois !

  9. Great, you have a microphone issue so you throw a label saying so directly over your mouth, so we also have a problem being able to read your lips. In case you weren't aware, people use lip movements to assist them with hearing–whether or not they have a hearing problem.

  10. The bottom of that greenhouse will be rotten in just a few years, because they did build it straight onto the ground, piss poor workmanship. If we did the same thing here in Norway the "legs" would be rotten by the second year or earlier. And the legs will sink quickly as the whole thing settles and then the full bottom will rot. They should at least used a stone as a foundation beneath each the legs, then the whole thing would last much longer. Flaming idiot, but the building itself is nicely built and that is sad because of the bad foundation.

  11. 8:42 we call these 'polycarbonate sheets' in my country
    People mainly use them for their garage roofing, verandas and terraces.
    Crazy expensive and mostly last 15 years.
    Had it installed as roofing for our garage and a few years later (because of rain) the ends were you see the channels/corrugation have started to grow mold. Even though it was sloping downwards it still grew mold. Would advise plugging up those ends with clear silicone or some other means.

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