Any home or business that has had a problem with Rodents, Bats, Birds or Larger Animals can accumulate unhealthy amounts of Urine and Feces. Animal Urine and Feces are known to carry over 35+ diseases. Cobra Pest Control offers a Safe Rodent Clean Up Service for a Safe, Clean and Sanitized Environment.
Guano can carry a fungus known to cause Histoplasmosis. Histoplasmosis is caused by breathing in fecal dust matter, a disease you can get from exposure to Bat Feces ( Bat Droppings). Some other Diseases, Bacteria and Parasites associated with Guano, Animal Droppings, Rodent poo or whatever you want to call it are: Staphyloccocci, Streptococci, Hantavirus, Roundworm, Cryptococcus the list is pretty long. Suffice it to say all Animal waste should be picked up, cleaned up and disinfected. Urine is also a major concern of which you cannot see. If cleanup is done wrong all the Dangerous Pathogens will be released into the air.
I use Owens Corning Fiberglass Insulation Faced for a Moisture Barrier between the exterior and the living areas. I discuss the Pros and Cons of the R-Value factor R-13 through R-38. The higher the R number means the thicker the Insulation and more Insulating power.
Loose Fill or Blown Insulation has many drawbacks. I have seen many air condition units overheat and break from insulation covering air intake. Loose fill covers ceiling joists making it very difficult and unsafe to walk in the attic. In fact many service people including; Electricians, Cooling and Heating Techs, Pest Guys, Home Inspectors etc. will refuse to go in the attic with blown insulation. The insulation is extremely messy, every time you open the attic door it will fall on you, your ladder and floor. It is IMPOSSIBLE to inspect for rodent droppings. If a wet Bat Dropping falls on to the insulation poof it is covered and surrounded by loose fill. Many Companies use an insulation infused with a borate type product to keep the Pests out but that would only work on insects, if at all. Borate products will do nothing for Rodents, Flying Bats or Wasp building nests above the insulation.
I do not use the Blown-in type Insulation. It makes a mess every time someone goes into the attic. It covers the ceiling joists and makes it very difficult for footing. It makes it virtually impossible to do any type of future inspections. I use Fiberglass Insulation, whatever the R-Value the customer wants.
Other things I do differently? I do just about everything different than most Exterminator Firms. I was trained differently in a different area of the country that required by far more Education and Experience.
(See Rob's Experience)
There is not one thing wrong with contractors with the exception of the Knowledge and Experience of Removing Animal Waste. Only a Licensed Pest Professional with Experience would know how to keep things Safe.