My house was built in the early 1950's and has no insulation in the attic or walls. Weather isn't a huge issue where I live, as it rarely gets below 50 during the winter, and rarely hit's the 90's in the summer.
With that being said, I recently had an HVAC system installed (we had some abnormally cold nights this winter!), and the neighbors that live behind us have outdoor speakers, which they regularly play as they host parties in the summer.
I'd like to add some insulation - if possible - to our home in order to make our HVAC investment more cost effective. Additionally, it'd be great to have any sort of sound protection.
Without any insulation, our walls simply consist of wood siding - empty space - and then the drywall material that is the inside of the home. Any thoughts on;
-- if it'd even be helpful to add insulation in the walls for temperature and noise?
-- is it a challenge to fill walls with insulation - as in would all the siding need to come off the walls, or would all the drywall need to be removed/punched and replaced?
Thanks for any feedback on this!