Boundaries in gardens are usually marked by hedges or fences: before you alter either of these, you'll need to find out whose fence or hedge it is - yours or your neighbour's. The title deeds to your home should state this. There are many types of fences available, so choose one that suits your needs: do you want it to add privacy, for plants to climb up and over, or to act as a windbreak? If your garden slopes, putting up fencing requires a little thought. Choose a fence type that can be made to follow the slope and make sure that the fence posts are perfectly upright. Don't try to follow every little rise and fall in the level of the ground or the top of your fence will go up and down like a rollercoaster track. Try to aim for one 'overall' and even slope. Panel fencing is harder to put up on a slope than post and rail or post and wire link fencing. On a gentle slope, you can put panel fencing in making a series of 'steps'. Make sure you take this into account when you buy your materials because you may need to order more panels and longer fence posts than normal. If your garden slopes steeply then panel fencing is no good, unless you want a big gap underneath the end of each panel.