Yes, it can be used inside. The screen comes with Velcro for easy installation. Using the dual lock Velcro you can attach to the wall in very strong grip. It depends on where you’re trying to use it. Best way is to use the Velcro included, but it can be mounted using thumb tacks, nails or other similar ways. In these cases make sure you don’t intend to move it around too much, since once pierced it can be damaged.
For more information please check out our guide setting up a great backyard setup
Or take a look at our recommended projectors and screens