out with the old, in with the new

This is the result of mould and water buildup occurring from inadequate insulation that causes attic moisture due to blocked or Insufficient ventilation, Improper exhausting of bathroom fans, dryer vents and roof Issues/leaks. 

The first step is to inspect your attic and look for visible signs of habitation by rodents or other wildlife and their feces. 

The next step is to capture or scare off sightings of wildlife and boarding up any openings for animals to re-enter. This will prevent damaging timber and insulation material either, through the waste they produce or by chewing of wooden appliances.

The final step is to remove contaminated insulation and excess feces to prevent household members from getting sick as a result of the diseases that these animals may transmit. 

Existing attic insulation settles, requiring the installation of new insulation or the removal of old attic insulation. The exposed attic floor studs are the first thing you see if your attic hasn't been insulated in a while and even though the previous insulation still has the same R-value, this indicates that your attic requires extra insulation. 

Mould development and insect attraction are common in older fibreglass attics which are a result of water damage, insect or rodent infestation. If you see a lot of dust around your air registers or are worried about the quality of the air in your house, attic insulation should be removed. The attic floor should then be sealed before installing new attic insulation.