In a domestic property where the internal consumer unit backs-on to an external brick outbuilding, what is the correct insulation to use to cover the holes, gaps and cables where the cables travel through the brick to the C. U?
(Cold air is blowing through to the consumer unit and into the house). Does it have to be flame retardant, even though the area in question is on the other side of a brick wall?
Thanks in advance.
(Cold air is blowing through to the consumer unit and into the house). Does it have to be flame retardant, even though the area in question is on the other side of a brick wall?
Thanks in advance.
