How to Build a Garden Greenhouse with Polyethylene Sheets

You can see many garden greenhouse along the countryside of our country good. But it is also possible to build them of small size and suitable for our needs, in our garden there are several ways to physically create a greenhouse, one of them is to use a wooden structure covered with polyethylene sheets, that is, large sheets of transparent plastic very thick and resistant that lends itself to different uses, that’s how.

You was needed:

• 210 meters of fir-tree from 4×4 cm
• 12 meters 20×80 mm
• 20 meters high Polyethylene sheet 200 cm
• A box of 4×60 mm self-tapping screws with cross-head, possibly galvanized or bronzed
• 10 mm Staples
• Contact Glue
• A cutter
• Pencil and screwdriver
• Drill
• Electric screwdriver
• Cutter
• Electric stapler
• Team
• 8 Pegs and fishing line
• Metro
• Wooden wedges and iron wire
• A small latch

Panel construction

Start with the construction of the panel. Mark all the strips from four for four of the measures you wish to make in advance. The panels must have the same height. The lower sides will have to be cut eight centimeters from the final width. To cut the head of the strips, you must run it perfectly perpendicular to the longitudinal axis. For these works it is best to use a cutter. At this point, the heads of the strips must first be drilled into place with a drill, so as to accommodate the union screws with the short elements. The screws must first be inserted into the hole and screwed in place. It is advisable to use self-tapping screws of adequate length that have best grip in the soft wood. Now place all the screws without tightening and check the corners with the team before tightening with the screwdriver. Now realize the reinforcements of polyethylene. Then, from a 20 mm section to 80 mm, cut the trapezoidal pieces isosceles with the base greater than 25 cm and the corners at the base of 45 °. When you have done this work, you can switch to place the reinforcing piece in a corner of the panel and mark the positions where you have to fix the screws, it will suffice 2-3 per part. Once you have completed this operation, proceed to drill the frame into the positions corresponding to the reference marks. The holes that should be drilled must be slightly smaller than the nominal diameter of the screws. At this point, you will have to temporarily lock the reinforcement in place and tighten the screws without tightening. Now place another reinforcement in the opposite corner and then screw it down.

The Wind

Now let’s go to the wind. To do this, start by placing a diagonal stripe, from an angle to the opposite side, and draw with the pencil the line according to which to cut the ends. Now place the cutter according to the correct angle and first cut a head, check the measurement frame and then cut the other head of the reinforcement. After putting the diagonal strip in place, pierce the frame for the passage of the self-tapping screws. Insert the screws and tighten them. The diagonal stripe has the function of stiffening the frame and preventing a permanent deformation. Now switch to central support.

In conclusion

At this stage of the work, the roof panels will have to be screwed to the central support which has a triple width than the external ones. At this point, the closing of the roof can be completed by tightening the two triangular panels, front and rear. To perform this operation, you have to put 4 screws on the base and 2 on the inclined sides. Once you have also performed this assembly phase, the tilting doors must be pivoted with two 80 mm long self-tapping screws, which must be placed in half of the uprights and not tightened to the maximum. At this point, after mounting the door in its compartment, you will have to assemble a small latch, which allows the closure. The construction of our fabulous greenhouse ends here.