Please watch the 20 min you tube video  before beginning . Manual is vague with minimal instructions. Parts are labelled with the same number even though some are left and right .Preassemble partial roof before putting into place . Requires at least 3 people to connect walls and roof . Screws are self tapping and metal sheets are 1mm or less ,so very easy to strip the metal sheets. My advise is to use only 2 fingers on the screwdriver to tighten screws. Its big and spacious but I don't think it can survive winter in Northern Ontario. Will need to put extra braces so shed can withstand wind and snow. Not sure about security , since panels just press into each other , a strong push or kick will collapse the walls with ease .