What if I have insulation installed already?
Most existing houses have at least some level of insulation in the attic. Many houses over 15 years will find that the depth of existing insulation is usually quite small as old glass/mineral fibre will settle over time and will be much less effective. There are two choices here: the existing insulation can be removed or Havelock Wool can be placed over existing insulation. If you remove the existing insulation, be sure to take all the proper precautions including gloves and dust masks. If you decide to add Havelock Wool over the existing insulation you will improve the overall insulation of your home and you will also minimise the old insulation fibers from blowing around the attic space.