What does the expression 'raise the roof' mean?

Answer 1

The expression 'Raise the roof' means to make a loud noise by clapping, singing, shouting. For instance at a gig people would come back from it and say the band 'raised the roof' as in the crowd went crazy, singing, cheering, clapping and shouting.

Answer 2

The expression "raise the roof" is an idiomatic phrase that means to create a noisy and joyful celebration or to generate a lot of enthusiasm and excitement. It can be used figuratively to describe a situation where people are showing great enthusiasm, energy, and loudness.