When ImCon has full control of a Specification, we like to specify a Stair Tower in lieu of standard scaffolding and/or ladders for access to the roof, windows, or walls. They are safer than ladders, less intrusive than a hatch, less disruptive to operations of a building, and the crews expend less energy accessing the Site. In addition, the crew may be able to carry small tools and materials without a crane or lift bed or a rope. In a way, they can be more productive. While there may be security concerns, they can be mitigated with razor wire, fencing, cameras, and locks. It is better to an Owner when a jobsite is safer and more productive.  The advantages of a stair tower may not be readily observable or noteworthy, but the safety concerns alone can outweigh the liability that an Owner can assume during a project. Where we have control of a project Specification, we insist on a stair tower. On this reroof in Fountain Valley, CA, the Owner was onboard without hesitation.