The internet is filled with DIY projects that involve the use of cheap materials, like plastic bottles. People have come a great length in the struggle for a healthier planet, in the last 20 years. Recycling is not only a trend but a necessity nowadays. And fortunately it has become a healthy habit.
First thing you need to know about building a greenhouse out of PET bottles is you ought to enjoy working with plastic. The trick is you actually build each `wall` at a time, although in total it seems you’re dealing with some kind of a castle, involving almost a thousand bottles in order to raise-up a 2 by 2 by 2 meters structure. Here is a effective advice to beginning the process: measure your bottles. Doing so, the frame will be exactly of the necessary size. If there is however any miscalculations, you could easily cut some of the height of the bottles.
Then it’s all about cutting and gluing the bottles between them and to the wood frame. Work on the wooden frame placed flat on the floor. Make sure you have a couple of pieces of wood positioned underneath the frame; this way, the bottles will be centered to the middle of the frame and not bulking in any other way. Pour a bit of silicon in between the bottles once the wall is done. Do the same with each `wall`. And remember to put in a flap panel for use as ventilation. You could also try the more futuristic round greenhouse structure. There is much to do. We’ll leave you to it.
One way to make good use of a repurposing PET bottles project is building a cheap greenhouse. For a conventional straight-angled structure, you will need these materials.
How to build your own Recycled Plastic Bottle Greenhouse
How to make one in eight easy steps…
1. Gather heaps of used plastic bottles. The 2 litre bottles are ideal and around 1,500 are needed for a large sized greenhouse
2. Wash the bottles and remove the labels. This can be done in a bucket of soapy water. Remove the bottle tops and cut off the bottoms of the bottles with a sharp pair of scissors. Be careful as the scissors and the cut bottles can be sharp. Remember this has to be done up to 1,500 times so can cause blisters and be time consuming. Done by kids with minimum supervision
3. Fix 4 posts vertically into the ground. Treated 4” x 4” posts cemented a couple of feet into the ground works great. These are for the corners of the greenhouse. Put slabs or mulch around and inside to suppress weeds. Best done by adults.
4. Make a frame for each side, roof, door etc. These are best done with treated 2” x 2” timber made into frames with mitred corners screwed together. Best done by adults and older kids.
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5. Stack the bottles one inside another with a garden cane supporting them through the middle. At one end reverse a bottle so it faces the opposite way from the rest and fit it inside. This will to make a long tube with the ends of the garden cane sticking out of the tops of the bottles at either end. Place the bottles and canes onto the frames to be attached at the top and bottom of the frame. Done by kids with minimum supervision.
6. Using fencing staples attach both ends of the cane onto the frame. The frame will keep the bottles squashed up. Staple as many rows as possible until the frame is filled. Done by kids with minimum supervision.
7. Screw completed frames onto uprights.
8. The roof can be flat or sloping. If making a sloping roof it is best to make two triangular frames for the gables. Staple bottles onto these frames as before. Screw the triangular gables to the posts and include a top beam and vertical supports (from the top of the gables to the top of the front and back panels). The sloping sides of the roof can be made out of similar panels as the walls. These can then be screwed onto the top beam, gable ends and top of the side panels.
The door can be made of a smaller frame hinged to a larger frame making up the front wall. Make the door smaller than the inside of the frame to allow it to open freely even if it sags. Best done by adults and older kids. .… then start growing your flowers, veggies etc
Greenhouse Shopping list (for greenhouse of 6ft by 8ft and 6ft high)