Ceiling Cavity Fires:
Ceiling Cavity Fires are generally caused through a build up of heat from electrical wires or heat generated from ceiling down lights, These fires have usually been burning in the Ceiling Cavity long before the home owner are aware of it.
Electrical Wiring in the Ceiling Cavity:
Electrical wiring in the Ceiling Cavity should be placed securely on the side or top of the rafters and be visible, never store any material on electrical cables in the ceiling cavity.
Down Lights in the Ceiling Cavity:
Down Lights are extremely common now through out the family home & look great once installed, Home owners are now using Down Lights as their indoor light of choice when renovating old homes or building a new home.
Over the years Down Lights have been installed with out any consideration to the heat they generate, the heat from one Down Light is around 400 degrees at the transformer, more than enough to start a fire in the Ceiling Cavity.
Ceiling Insulation & Fires:
Ceiling Insulation & fire are extremely common & are usually associated with heat produced from Electrical Wiring or Down Lights, There are two common types of Ceiling Insulation – Ceiling Batts or Pump in Insulation.
Most Ceiling Batts used by an authorised installer will be rodent & fire resistant; these are installed by placing each Ceiling Batt in-between the Ceiling rafters, while installing the Ceiling Batts the installer will lift all Electrical Wiring & place it on the top of the Ceiling Batts allowing the Electrical Wiring to breathe. This will keep the Electrical Wiring visible & as it was suppose to be installed.
Most Pump in Insulation used by an authorised installer is rodent & fire resistant; Note – the fire retardant on Pump in Insulation only last up to12 months; this came to light after working with the NSW Fire Department to remove burning Pump in Insulation in a Ceiling Cavity in March 2009.
Pump in Insulation is pumped into the Ceiling Cavity from an external source i.e. Pump Truck, This is blown into the roof cavity using a large Vacuum type hose. By blowing the insulation into the Ceiling Cavity you do get an over spray of insulation on Electrical Wiring & Down Lights, Once the insulation has been installed the installer should walk through the Ceiling Cavity & remove the excess insulation from these area’s.
It is my opinion that over time pump in insulation allows Electrical Wiring to sink below the surface of the pump in insulation causing extra heat to be generated, this can cause a smouldering effect in the insulation casing the cardboard coating on the gyprock to catch fire.
The Ceiling Cavity is not air tight, this means on days where there is wind blowing outside it is more than likely the air is moving inside the Ceiling Cavity, this is a concern when you have Pump in Insulation fitted; if the insulation is blowing around in your Ceiling Cavity it can end up anywhere i.e. on Electrical Wiring, Down Lights or Bathroom heat lights, this is a Fire concern.
Benefits of Ceiling Batts are:
One of the main differences between a Pump in Insulation Vs a Ceiling Batts is a ceiling batt is easy to remove if you are requiring renovations, installing new Down Lights, IXL tastic heat lights etc. Trying to do renovations with Pump in Insulation in your Roof Cavity is a nightmare.
All ceiling dust should be removed by a ADRA approved Ceiling Vacuuming Specialist, ADRA is The Australian Dust Removal Association & follows strict guidelines for removing harmful substances, removing the dust from your ceiling cavity can have huge benefits for Asthma & Allergy sufferers. Dust particles find their way inside the house via air vents, down lights, heat lights, crack in cornices & painted ceiling boards.
Once Roof Cavity Vacuuming has been done; you will notice less dust on furniture throughout the house, saving you time cleaning.