IF YOU HAVE A RANCHER AND YOU WERE GOING TO ADD A SECOND STORIE , IF THE CEILING JOISTS WERE ALREADY THE RIGHT SIZE AND THE RANCHER CEILING WAS FULLY INSULATED, IS THERE ANY HARM LEAVING THE INSULATION THERE SO IT ENDS UP BETWEEN THE TWO FLOORS? I MEAN NEW TWO STORIE DON’T HAVE INSULATION BETWEEN LIVING FLOORS. WOULD IT MESS UP THE HEATING OR A/C by blocking a transfer between floors?
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Fred
The insulation between floors may help with sound control; I had insulation placed between the kitchen and upstairs for just that reason.
As long as it doesn't block anything that needs to be open (space around some kinds of can lights), I'd leave it there.
BJ
FRED... I HEAR YOU MAN !
adding a 2d floor can be fraught with danger... if you can keep the insulation dry ( and everything else on the old first floor ).. then by all means leave it there, it will help in zoning your HVAC, and in some sound control..
but if it gets wet... rip it out...Mike Smith Rhode Island : Design / Build / Repair / Restore