Insulation for home built 1962 -- advice, recommendations
We want to add insulation to our Southern CA house built in 1962. So far we have two estimates: one recommends cellulose, the other recommends fiberglass except that we will probably want to use cellulose in the attic where our furnace is located, out of consideration for whoever will one day have to service that furnace.
One guy says we should insulate walls between house and uninsulated garage, the other says not. Who is right?
One says that insulation only lasts 10-20 years, the other at least implies that it lasts longer. Who do we believe?
I've looked around for some unbiased sources, hope some of you can help.