A further question to ask is should I insulate a home built the 1920s? There are different schools of thought to this question, so let us explore the reasoning behind why you will hear different contractors make various suggestions.
We want insulation in our homes, but can insulation cause a problem? Improperly installed insulation can.
Some home designs cause attic layouts which need ventilation help. Installing a solar powered attic vent can be a great solution.
When you begin to seal and insulate your home, moisture can become a bigger problem. A constant supply of moisture can lead to mold, but non-constant moisture can lead to problems with wall coverings and more.