How is the performing of a dedication of a home by a Priesthood holder done? Does he have to raise his hand? Thanks.
I would follow the Church Handbook of Instructions on this one:
20.11 Dedicating Homes
Church members may dedicate their homes as sacred edifices where the Holy Spirit can reside and where family members can worship, find safety from the world, grow spiritually, and prepare for eternal family relationships. Homes need not be free of debt to be dedicated. Unlike Church buildings, homes are not consecrated to the Lord.
A Melchizedek Priesthood holder may dedicate a home by the power of the priesthood. If there is not a Melchizedek Priesthood holder in the home, a family might invite a close relative, a home teacher, or another Melchizedek Priesthood holder to dedicate the home. Or a family might gather and offer a prayer that includes the elements mentioned in the preceding paragraph and other words as the Spirit directs