Visible daylight during the attic: If you can see daylight shining with the attic ceiling, there are gaps or holes during the roof. This enables drinking water to enter and might compromise the insulation of your home. Nail the flashing down along its exterior edge (you don’t want any nails https://topthenews.com/the-3-best-commercial-roofers-in-naperville-il-top-choices-for-quality-and-reliability/