What tools do I need and is the timber pre-drilled?

For maximum efficiency our installation teams use electric screw guns with socket attachments, however if these are not to hand, the alternative of a 13mm and 17mm socket and wrench will do the same job, along with a screwdriver for any roof boards, etc. Some of the poles will not have holes in them. This is normal. Where two timbers are attached to each other we pre-drill one timber, the outer timber. We use self-tapping screws which will screw into the timber without pre-drilling. This allows for adjustments to suit uneven ground.