Ive heard electricians complain about blown-in insulation. My understanding for external walls, is RISE will blow in from outside through the shingles. How will this affect any future electrical upgrades I need to do? I believe my house has knob and tube

great info here! thanks! for those who did this recently, how long did it take from signing contract to getting the insulation contractor to your house? and how long did it take them to be on site?