I'm planning to install new lights in our living room. There's an existing support beam that I'd like to use as base for a drywall ledge where I could install my spots.
A side view of the idea looks like this:
The beam is solid and I don't want to drill in it, some I'm thinking of gluing a border to drywall (alternatives?) using good mounting glue.
Will the drywall keep its flat shape in this configuration or will it get deformed with time? Should I add supporting L-brackets at some regular interval?
Any other factors that need consideration?