Questions about building paver labyrinths.
How can I get the math to work for a 20-foot paver labyrinth that I want to build in my driveway?
You are in the UK, so I don't know the size of pavers there. Here, they are common/y 4.5 inches square. Or bricks are 4 x 8 inches. Bricks don't work well for small circles, however. The triangular space between them becomes very prominent. If you make a five-circuit pattern with one paver for the line and three for the path, you should be able to fit it in. For a seven-circuit pattern, you would need to use half-size bricks, which gets more complicated, either in purchasing them or cutting them. The perimeter of the paver area must be secured with edging, to keep the pavers from moving. Usually these are set in place with long spikes being driven into the ground. If you are putting these onto a paved driveway, you won't be able to use spikes. Perhaps you can find a stong epoxy and glue them to the surface.
Another issue is the fact that you have two colors of pavers. Many places sell pavers only by the pallet bundle. That would be far more than you would need. The alternative is to go to a place like our Home Depot stores, which sell pavers by the piece. Paver companies also sell circle bundles, which are made with wedge-shapes pieces suitable for making circles. This would be a good way to go for the pathway, but if you ordered a whole bundle in the line color, you would have far too many left over. An alternative is not to use two colors of pavers, but only one, and then stain the pavers to make your pattern. That might be more economical. Use normal concrete stain, which would then also need to be sealed.
How many pavers do I need to make a labyrinth?
If you are just using the pavers for the lines, with paths of grass or mulch, then you can use this rough rule of thumb. For a 7-circuit labyrinth, multiply the diameter of the labyrinth by 12. For an 11-circuit, multiply by 25. This will give you an estimate of the length of the lines. Then divide by the length of the bricks you plan to use. The bricks don't actually fit snugly, so the number you get will include some extra ones. If you are buying pavers by the pallet, you will likely have to round the number up to the next complete pallet. A few companies will sell partial pallets.
For an entire labyrinth made of pavers, the easiest way to estimate the number is to do it in computer aided drafting (CAD). Some of the larger paver companies have websites and literature that allow you to do this calculation on line. At the least, you can use the formula they provide, and a calculator. Pavers come in bundles, that may have 900 or so pavers per pallet. We have done labyrinths that have taken 18 or 19 pallets. They are delivered by trucks with forklift equipment to unload them. Have them placed as close to the labyrinth as possible, preferrably distributed around the labyrinth. This minimizes the distance that they must be carried by hand, when making the labyrinth. Your base should be in place before the pavers are delivered, or they would be in the way of the equipment. Open the bundles one at a time, in case you have some pavers left. Unopened bundles can be returned. Here are two websites with extensive instructions. They would probably also send you a CD upon your request. http://www.unilock.com and http://www.americaspremierpaver.com
Where can I get information about constructing paver labyrinths?
I don't know of any source for paver labyrinth instructions. They are quite technically difficult. Usually people hire professionals to do that kind of work. Sure, you can just throw out some pavers onto the ground, or even onto a base, but in a few years, they may look pretty bad. The two websites shown above give general instructions on how to lay a patio or driveway. However, a labyrinth is quite a bit more involved. Your best bet is to contact Marty Kermeen, the world's best paver artist (see www.artpaver.com). We have made a number of paver labyrinths in conjunction with Marty or local landscape companies, using the technique of staining the pattern. For examples, see Federated Church and Dominican