We have a 1800SF Ranch house with a 8 pitch roof. Our attic((between our ceiling and roof)has blown in insulation. How much insulation should it have in this area? We are not sure how to measure blown insulation. If we don't have enough what is the best way to add more? Hire someone or do it ourselves. I'm leary about hiring a company. I want to get what we pay for and make sure its enough insulation.