Core drilling help needed

[Jonofholes]

Morning

I'm drilling throught my kitchen wall to fit a vent for the dryer with a 107mm core drill, but I'm getting some sparks, I've checked with the hire firm and its alright to use the drill as I sure I'm going through engineering brick, so I'm just taking my time and letting the tip cool between drilling.

my problem is that I've gone through the first brick and hit the cavity that is filled with a yellow fibre insulation - is this flammible?

any thoughts appriciated

thanks

Jon

 

[r896neo]

you may have unluckily hit a wall tie which would spark.

 

[Deluks]

Insulation not flammable but you should probably remove it around the area you're drilling before continuing. If your pilot has gone right through then you should now start from the other side, breaking through into the cavity.

 

[PrenticeBoyofDerry]

Yep as Deluks has stated, if you have cored your internal brick, the pilot should hopefully be through on external brick, so start drilling from that side.
It will also prevent damage to the brick work.

 

[mointainwalker]

Glass-fibre wool burns around 1300 C so you are safe.