DIY Greenhouse

Submitted by Ana White on Mon, 03/04/2019 - 16:31
Difficulty
Intermediate
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DIY Greenhouse plans - build your own DIY greenhouse, free step by step plans by ANA-WHITE.com

Greenhouse

Building your own greenhouse is something you can tackle and save a ton.  We built this greenhouse about six years ago, and it still looks brand new and is as sturdy as ever.  We are happy to share our plans with you - see below.

Here's some photos of the build -

Near completion of the framing stage. We used 12' long pieces of corrugated metal roofing for the side walls.

We ran the corrugated roofing horizontal.  This was very easy to install and we have had zero issues with this design.

We also trimmed the corners out with metal flashing to make everything look nice and finished.

The greenhouse plastic wrapped right over the corrugated metal - like it was meant to be!

The only part that was slightly tricky was the ends - but really no big deal to add the greenhouse plastic panels.

Our DIY greenhouse turned out great and we are so excited to share the plans with you.

Please post a pic or share if you build!

Pin For Later! 

DIY Greenhouse

Dimensions
Greenhouse plans
Dimensions are shown above for the DIY Greenhouse. It's a good size for a standard family of 4 or 5

Preparation

Shopping List
  • 3 - 2x4 @ 10 feet long - use on back wall
  • 5 - 2x4 @ 12 feet long - use on sides/ridgepole DO NOT CUT
  • 32 - 2x4 @ 8 feet long
  • 11 - 12 foot x 26" standard corrugated plastic greenhouse panels
  • 1 - 8 foot long x 26" wide standard corrugated plastic greenhouse panel (use on door side)
  • 3 - 12 foot long tin panels (use on sides and back)
  • 1 - 8 foot long tin panel (use on front)
  • Tin screws
  • 28 - 4' long ribbing strips
  • L flashing (optional for the corners)
  • You'll need either metal gussets for the trusses or to cut plywood ones from 1/2" plywood
Common Materials
3 inch screws
Cut List

Cut list is in plan at each step

Tools
Tape Measure
Speed Square
Pencil
Hammer
Safety Glasses
Hearing Protection
Kreg Jig
Drill
Circular Saw
Miter Saw
Level
Drill Bit Set

Instructions

Step 1

Back wall framing.  Cut 2x4s as listed below.  Screw together with 3" screws or nail together.

  • 2 – 2x4 @ 118 3/8”
  • 6 – 2X4 @ 32”

 

Step 2

Side Wall Framing - Build TWO

  • 4 – 2X4 @ 144”
  • 14 – 2X4 @ 32”

 

Step 3

Front Wall Framing

  • 4 – 2X4 @ 32”
  • 4 – 2X4 @ 42 ½”
  • 2 – 2X4 @ 81 ½”
  • 1 – 2X4 @ 33 3/8”

Build the front walls as shown.

Step 4

Attach the four walls together with 3" screws at corners.

Step 5

Step 6

  • 4 – 2X4 @ 48” (BOTH ENDS CUT AT 22 ½ DEGREES, ENDS NOT PARALLEL)
  • 1 – 2X4 @ 117 7/8” (BOTH ENDS CUT AT 22 1/2" DEGREES, ENDS NOT PARALLEL)
  • 1 – 2X4 @ 55 3/8 (TOP CUT TO DOGEARED POINT, 22 ½ DEGREES)
  • 2 – 2X4 @ 55 ¼” (TOP CUT TO DOGREARED POINT, BOTTOM CUT 45 DEGREES OFF SQUARE, END CLIPPED)

The back truss is built same as front. See next step for close up of the center cuts

Step 7

This board was a little tricky to cut - practice first!

Step 8

1 – 2X4 @ 141”

NOTE: If you use gussets - we used 1/2" plywood - this will affect your ridgepole length. 

Step 9

 

  • 10 2X4 @ 48” (BOTH ENDS CUT AT 22 ½ DEGREES ENDS NOT PARALLEL)

  • 10 2X4 @ 47 1/4” (BOTH ENDS CUT AT 22 ½ DEGREES ENDS NOT PARALLEL) - shorter rafters go up to meet the ridgepole.  I marked all shorter rafters to avoid confusion.

 

For the common rafters of this barn style greenhouse, we ended up using plywood gussets to save money. After cutting quite a few, I figured out how to cut gussets the super quick and easy way - got gusset cutting down to less than a minute each.

We put gussets on both sides of each rafter joint with glue and screws. We made all of the small trusses first on the ground, then it was just a matter of stacking them on the ridgepole and attaching to the studs. We used 8 screws per gusset. Common rafters are installed flush to top of ridgepole and flush to outside of side walls. We had to "toenail" the screws in - meaning they are screwed in at an angle. We used glue and 3" screws from both sides.

Step 10

The plan will get you through the framing.

At this point, you could use plastic paper, lexan glass panels, you name it to seal the frame in.

We used the corrugated plastic panels detailed earlier for installation. IMPORTANT: If you do not use panels you will need some sort of lateral support to keep the greenhouse from swaying side to side. Try 12 foot long 2x4s. 

Finishing Instructions
Preparation Instructions
Fill all holes with wood filler and let dry. Apply additional coats of wood filler as needed. When wood filler is completely dry, sand the project in the direction of the wood grain with 120 grit sandpaper. Vacuum sanded project to remove sanding residue. Remove all sanding residue on work surfaces as well. Wipe project clean with damp cloth.

It is always recommended to apply a test coat on a hidden area or scrap piece to ensure color evenness and adhesion. Use primer or wood conditioner as needed.

Comments

4sandgoddess

Wed, 10/21/2020 - 11:52

Hello. I am new here. I absolutely LOVE everything you build Anna!! Thank You so much for sharing your talent with us all.....
I am just wondering if you or someone on your team still reads these comments? From reading all of them start to finish, I now have several questions myself, that others have asked, that have not been answered.

#1 Is it 32 inch or 33"?

#2 The ballets (I think I named that correctly?) The piece you can buy or make yourself to connect the joints? More info. Please?

#3 In respect to the corrugated plastic panels being attached horizontally verses vertically? Snow load, leaking inside from rain, etc.?

#4 Last but not least, how to adjust the plans correctly for a 10 x 18 Greenhouse?

Any response will be GREATLY APPRECIATED!!

Thank You....

4sandgoddess

Wed, 10/21/2020 - 11:54

Hello. I am new here. I absolutely LOVE everything you build Anna!! Thank You so much for sharing your talent with us all.....
I am just wondering if you or someone on your team still reads these comments? From reading all of them start to finish, I now have several questions myself, that others have asked, that have not been answered.

#1 Is it 32 inch or 33"?

#2 The ballets (I think I named that correctly?) The piece you can buy or make yourself to connect the joints? More info. Please?

#3 In respect to the corrugated plastic panels being attached horizontally verses vertically? Snow load, leaking inside from rain, etc.?

#4 Last but not least, how to adjust the plans correctly for a 10 x 18 Greenhouse?

Any response will be GREATLY APPRECIATED!!

Thank You....

fallbrookjohn

Tue, 01/26/2021 - 18:33

The plans depict 33” long 2x4’s for the walls, yet the cut list states they are 32”. Which is correct?

Frosty Garden

Wed, 01/27/2021 - 11:44

You can do any length you want on the studs, technically. We used 32" on ours, which allowed us to get (3) studs per 2x4x8 when you split the kerf. We guessed that the original plans were for 33", but it was later realized this was very lumber inefficient.

gfm2965

Fri, 03/05/2021 - 09:47

Thanks for your response! But it does make a significant difference, 32" or 33" studs. For one thing, the tin panels are 36" wide, and the 33" studs bring the wall height to exactly 36" Using a shorter stud means an inch extra on the panels, so you would need to cut an inch off (a pain). Also, the height of the tall verticals supporting the ridgepole depend on this measurement, so what height should they be? Thanks again!

1231georgekay

Thu, 04/01/2021 - 07:44

On the instructions it indicates the studs in the side walls are 33" yet the instructions say to cut them 32". Which is correct the 33"on the picture or the 32" on the instructions?

AndiAndi

Fri, 04/16/2021 - 13:13

Totally love this very do-able greenhouse. Two questions: 1) If I wanted to increase the length of the GH, what do you suggest? Would I need to repeat a variation on the framing ends for support? and 2) as a botanist and horticulturalist a primary concern is often green houses that are too hot and need cooling methods such as shade cloth, AC and ventilation. IF I were to make both ends framed for a door, will the structure still be sound?

Elle123

Sat, 05/08/2021 - 07:51

What about adding a floor...would make a nice gardening shed too, but i want a floor so snakesabd mice can't get in. And we would finish it all out with Wood or metal as we want to put tiller and other garden supplies...fertilizers, hoes, shovels etc...

will2568

Mon, 06/14/2021 - 14:36

These plans are inconsistent in measurements. The diagrams show a measurement of 33 inches for the wall studs, but the cut list shows the measurement of 32 in. Which is it?

will2568

Mon, 06/14/2021 - 14:41

I'm just going to go ahead and assume that the cut list is correct and the diagrams are in error because you can cut an 8 foot plank into three 32" pieces with no waste. I have to wonder how many more inconsistencies I'm going to encounter.

maddog67

Fri, 09/10/2021 - 09:57

On the sidewall image, it shows a measurement of 33 inches, but in the instructions below the image it says to cut 14 2 x 4 by 32 inches. Is the correct length 32 or 33? It's the same issue on the front and back sidewalls.
Thanks!

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