My design is a Frankenstein version of various designs that I have seen on the internet, and works on the idea of tiered boxes (rather than just a box). This makes it easier to access the worm waste.
I used Ikea stacking boxes and therefore, this instructable will be centred around using the same; however, similar boxes could be used!
I thought that it was quite easy to build, and I hope that it works for you too! Good luck!
Step 1: Tools and Materials
+ Work bench or table - (one that could be accidentally cut, without the resultant swearing and/or tears)
+ Ruler or tape measure
+ Jigsaw and plastic cutting blades
+ Power drill and a small drill bit - (a second bigger bit may be required, depending on your saw)
+ Hot glue gun and glue sticks
+ (Sealant gun - if you don't have a squeezey sealant bottle)
+ Cup of cold water
+ Drilling block of wood
Materials you will need!
+ Three Ikea "Slugis" boxes - size 54x35x16 cm (20l)
+ Three Ikea "Slugis" lids - size 54x35 cm
+ Bathroom sealant
Step 2: Marking out two of the lids
Do the same with one of the other lids.
Step 3: Cutting out the centre of the lids
Carefully cut along the line, trying to keep just inside it. (You can always cut more, but you can't get it back if you cut too much!) I used the guiding rule/bar on my saw to help keep a straight line.
I won't lie - getting a straight line isn't the easiest part, but it is important to get it as straight as possible around the L shaped knobbly bits.
Do not cut into the L shaped knobbly bits!
Once you have cut the hole, repeat the process on the second lid.
Step 4: Gluing the lids to the base of the trays
The feet of the box should fit tightly into the square hole that you cut. If it doesnt, then some careful trimming of the lid should fix it.
Once you know that the lid fits, one by one hinge the lid away from each foot to create a gap between the lid and the base of the box. Fill the gap with glue and quickly push the two surfaces together. repeat this for the other three feet.
Next glue the gap along the sides, between the lid and the box. Make sure that you are gluing the surfaces together, and not just sealing the edge.
Step 5: Sealing the edges
Step 6: Drilling the holes
Make sure that you insure that the holes aren't too close together. This insures the boxes structure.
Repeat with the second box.
Step 7: Stack it and you're finished!
The next stage is to drill holes for air, but I have not decided where to put them yet! Some people put a tap in the bottom to drain the liquid, but I chose not to. It's easy enough to check it regularly and tip it out.
I would definitely recommend that you research how to keep the worms. It is relatively easy, but there are differing opinions on the best way. I'll leave that up to you!