You should wear suitable protective equipment during a roof window installation, such as hard hats, protective gloves etc. It is recommended that you wear safety masks and goggles when cutting any internal materials in the roof or when cutting tiles. Furthermore, it is also suggested using temporary support battens when placing the window frame.
You should complete the installation of a roof window from the inside of the house, and scaffolding is therefore not necessary.
However, as with all construction, there is a risk that objects might fall from the roof (hammer, tiles, etc). We therefore recommend that you never leave any object resting on the external face of the roof and that any area at risk should be sectioned off to minimise the hazard. It’s vital this is done appropriately in accordance with the Health and Safety at Work Act.
Even as an experienced roofer, you should consider an extra pair of hands. Windows can be heavy so it’s recommended to work with another person when handling the window – especially when lifting into position.