Case Study 1 – Tile roof
This job was fairly typical of an older house that has had insulation installed, but it is past it’s use-by date. The glass fibre batts aren’t too degraded, we’ve seen much worse, but they are full of dust brought in via the gaps in the tiles and they have been thrown around by various trades over the years, leaving significant roof areas with no insulation.
This is unfortunately all too common. An electrician comes in to change some wiring and moves batts out of the way, but doesn’t replace them. The evaporative cooling gets serviced, they move some batts to get access to vents and don’t replace them. The owner never goes up into the roof to check and you end up with 20% of your roof not insulated. Having the batts sitting over joists and folded into strange shapes speeds their degradation and you end up with this kind of mess.