A basic rule of thumb is that if you can see the rafters in your attic, it does not have enough insulation. From there, we recommend having a trained professional assess how much and what types of insulation should be used. Attics can be difficult for the average person to insulate properly because there are so many intricacies in an attic such as air leaks, required ventilation, and possible animal intrusions. Maneuvering around these types of obstructions can be difficult and even dangerous which is why the job should be completed by a certified professional installer.