b'step-by-step words and pictures: Rachel Macdonaldbuilding a compost heapYoull need: timber for corner posts (we used 100mm x 100mm) and framing (we used 100mm x 50mm), half rounds for removable fronts (we used 140mm x 50mm), trellis beading, galvanised steel mesh, nails, staples, string line, tape measure, spirit level, square edge, hammer, saw, spade, wire cutters Step 1 Decide on the type of composting system that will best meet your needs. In this large garden, we opted for a triple-stage bin. It can take three to four months for composting to take place. In that time, the heat at the centre of the pile will approach 60C, and everything in the bin needs to go through that cooking process to kill any weeds and avoid putrefaction. One bin will belled with clippings, which will be turned regularly for even aeration and heat distribution. Over the composting period, the other bins will be progressivelylled and turned, so there is always a good rotation of material in and out of the system. Then, using a string line and pegs, map out the dimensions of your composting system. Dig holes for the support posts and bed them in. It helps if the corner posts are the same height as the steel mesh you plan to use.Step 2 Measure out the framing, cut to length and nail onto the vertical supports top and bottom for stability. We also used a length of half-round on the outside edges of the framing for looks, and half-way down the exterior edges for added strength, once the mesh had been added.Step 3 xx82 |'