How to Make a DIY Greenhouse | I Like To Make Stuff

How to Make a DIY Greenhouse | I Like To Make Stuff

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!

TOOLS & SUPPLIES (affiliate links):
Sunlite Polycarbonate Sheets:
Brown Engineered Panel Siding:
Tuftex 6mm H Channel:
National Hardware Spring Hinges:
Kreg Accu-Cut:
30 Seconds Outdoor Cleaner:
Bostitch Framing Nailer:
DeWalt 20-volt Circular Saw:
DeWalt 20-volt Jigsaw:
DeWalt Drill & Driver Combo:
DeWalt Miter Saw:
Union Washer Wood Screws:
Keter Shelving Unit:
Accord Ventilation Register:
AcuRite Digital Thermometer:


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 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

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How to Make a DIY Greenhouse | I Like To Make Stuff

I Like To Make Stuff


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What do you think?


Written by Aleksandar

Video MakerContent AuthorYears Of Membership


  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. High moisture so close to the house (from watering, and trapped humidity) may result in swelling of the ground at this corner of the house, differential ground movement damage to the house, as well as attracting termites. I would not recommend anyone attach a greenhouse to their house.

  3. I have to say that, sorry, but you guys have no knowledge of the ventilation and you make everything wrong. You have to remember that any room is breathing cool air coming through top window falling down and then hot air come out, so you basically need to make two small windows on the top of the sides and not need make on bottom.

  4. Instead of relying on two_by -fours to level the floor, use six-inch brick pavers, stacked as needed at the corners and in the center. They won't rot.

  5. umm.. I like this design idea with the large windows, but I was thinking of making what I'm calling a "reverse catio" instead of having an area fenced in that is outside so the cat's cat go outside. Make something like this with a cat door and flap on one end and a human door on the other. (that way the humans can leave food and fresh water as well as clean blankets or beds) This seems like a good idea, for a few farm cats, we have 3 at the moment.

  6. Wood floor for greenhouse, yes lets make mud. Like everyone else in the world, use gravel. I am thinking of building something similar against my brick house and closing the air gap with insulation instead of an added back wall.I think the brick will clean upon removal. GRAVEL.

  7. L'ensemble du quartier d'habitation est recouvert au 2/3 (maison, béton et bitume). La serre est équipée d'un sol en dur! Pourquoi ne pas exploiter la vraie terre?
    Et tout ce bois! Forêt Amazonienne? Tant de vis, clous, quaincaillerie… cette débauche consumériste. Tant de vacuité. Faire, juste pour faire, sans réflexion.

  8. I plan to build a lean to greenhouse and notice a few things which they did wrong. They paid for expensive polycarbonate sheets but didn't seal any of the ends so bug, dirt and water will get in between those openings making the whole thing look dirty in the future. The use of wood as a floor is not a good idea as it will rot. The gaps against the house should have been sealed to keep in heat. Those vents on the roof will probably blow off or tear.

  9. Millennials 'building' a greenhouse on stilts that will go crooked, with a plywood floor that will grow mold, with siding touching the ground that will rot and taped on air vents. Could have spent another $100 and done it correctly.


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