Fiberglass Insulation

• Fiberglass insulation comes in faced and unfaced batts, rigid batts or is blown-in. Blown-in insulation resembles cotton candy or large puffs of cotton. Made from woven strands of glass, fiberglass insulation is essentially harmless after installation, but can cause skin irritation during the installation process. The materials that make up fiberglass include sand, ash, boron, recycled glass and acrylic polymers.
  
  

Cellulose Insulation

• Cellulose insulation is made from recycled paper, and while paper itself isn't harmful, some of the inks and chemicals used on paper are. The chemicals and fibers from cellulose insulation can be irritating or cause allergic reactions to those affected with these types of allergies, during the installation process.
  
  

Rock Wool Insulation

• Rock and iron ore materials are used to make rock wool insulation. The chemical binders used in rock wool insulation can cause allergic reactions to those who are super sensitive, but most irritations from rock wool occur at the installation stage.
  
  

Foam Insulation

• This insulation is the most hazardous because it's made entirely from chemicals, such as polyurethane and chemical binders. The manufacturing and installation process is highly toxic and the foam requires several days to cure after installation. Toxic fumes may result.