I am doing some construction in my house. As part of that job, I had to take down three of the Mezuzos in my house. I am now ready to replace them and I want to know if I need to make a Bracha when I put them up.
You must make a Bracha when putting them up (Chovat Hadar 11,14). Make one Bracha before replacing the first Mezuzah and have in mind all three.