Over the ensuing months, Waines and several other young men were at various times co-tenants of the house.
In August, Dowler started asking associates to torch the property, promising cash payments to anyone who would accept the job.
Eventually, a plan was hatched between Dowler, Haines and another 17-year-old, who is yet to be dealt with by the courts.
On August 26, Dowler and her partner travelled to Christchurch for a weekend to ensure that they had alibis, while Waines and the other youth set fire to the house. Waines poured petrol through the property and his friend set it alight.
The Westport Volunteer Fire Brigade battled the blaze for an hour and a half, but was unable to save the house.
Dowler returned to Westport and immediately lodged an emergency claim for $5000, which AMI paid out, but the remainder of the policy was withheld when the authorities ruled the fire suspicious.
A police investigation eventually revealed the arson plot.
At a recent Greymouth District Court appearance, Judge Raoul Neave agreed with a submission from lawyer Doug Taffs that Waines had been heavily influenced by Dowler, who was the ringleader.
As a first offender, Waines was told he would most probably get home detention, but on Thursday, Judge McKegg decided that the seriousness of the offence warranted a full prison term.