A spark created during a routine heat pump installation has left a Waikato couple homeless after their home burnt to the ground.
Waikato fire and emergency safety officer Kevin Holmes says there is nothing left of the rural Te Awamutu home after the blaze began just before midday today.
Holmes said two contractors were at the Thompson Rd home, about five minutes north of Te Awamutu, installing a heat pump. As part of the installation the workmen had to do some welding on copper piping.
"He has been welding and a spark from the welding has got into the insulation, and it's ignited the insulation around the copper piping and it has burnt through the brick wall and into the building's lining, and it's just travelled up the internal framing and into the ceiling."
The fire then quickly spread the length of the home, burning it to the ground.