Take a look in your attic. In most climates, you’ll find insulation about 12 to 15 inches thick, which provides insulation of about R38. This varies, depending on the climate, but 12 to 15 inches is a good rule of thumb.
If you don’t have that level of insulation or you don’t know where to look, seek advice from a professional. The pro will know the standards for your area and can give you good advice. Make sure the pro talks about air sealing between the heated space and the attic as part of the insulation system. Air sealing is just as important as insulation.
Amelia's Home Inspection offers the highest quality Home Inspection services in Greater Milwaukee, Wisconsin at an affordable price. A home inspection provides an analysis of potential fire hazards, home safety and health risks to your family.