Retrofit insulation?

[bolson]

Dear Dr Lj,
My old house is cold and heated by expensive oil, I believe the best course of action is to improve its insulation. Blowing in insulating fluff into the attic seems like it should be an easy win. I hear this can be done to the walls too, but is somewhat more involved as it may include peeling off parts of the siding and cutting holes to blow in through. I just had another thought, take off all the siding and add a few inches of insulative thickness to all the outer walls. This of course seems like a somewhat radical measure. Any ideas on if this is otherwise a reasonable idea? Anyone else heard of this or other thins being done?

Comments

[chamois.livejournal.com]

Adding foam insulation on the outside is fairly common. However, you can then only put vinyl siding on because everything else is too heavy to hang off of long nails through the foam.