HN-04Check the timber and any cables before you drillPress the timber at each fixing point. Sound wood feels solid; if it's soft, crumbly or damp, move your fixing point a little to catch solid timber instead. If your shed has mains electricity for a light or socket, cables can run inside the wall panels to reach them, so use a cable detector near any socket, switch or light fitting, and if in doubt switch off that circuit at the consumer unit before drilling nearby. A garden fence normally has no services in it, but check for solar light cables stapled along the top rail.