$9m Mt Lawley Primary School arson teens jailed for eight months JAILED: Two teenage boys who caused a $9 million fire which destroyed Mt Lawley Primary School, leave Perth Children's Court at their last appearance . DESTROYED: The teenagers who lit the $9m Mt Lawley Primary School fire were drunk and stoned, the prosecutor tells Perth Children's Court. THE teenagers who lit the $9 million fire which destroyed the historic Mt Lawley Primary School have been jailed for eight months. The two teens, who cannot be named for legal reasons, appeared in court today after earlier pleading guilty to a charge of criminal damage by fire. Both were sentenced to eight months immediate detention. They will be eligible for community-based supervision after four months. Before handing down his sentence, Children's Court president Judge Denis Reynolds reiterated earlier comments he made concerning the state's juvenile detention crisis, saying keeping young offenders locked up at Hakea Prison was not appropriate. He said a recent report he had received regarding the "harshness" of conditions at the adult prison for juveniles meant the courts were not handing down the sentences they would normally impose. Young offenders, he said, had been subjected to long periods of lock-down, use of restraints and lack of access to rehabilitation and education programs. "That's something that needs to be rectified," he added.Yesterday it emerged a Kalgoorlie Magistrate had granted bail to a boy after expressing concerns over conditions for juveniles at Hakea Prison. Judge Reynolds said that while he considered the "harshness" at Hakea as well as the mitigating factors for both boys - that they pleaded guilty, took part in victim mediation and were genuinely remorseful - the seriousness of their crimes and the effect it had on the school community far outweighed the circumstances. He said only immediate detention was the proper option and sentenced both to eight months. They will be eligible for community-based supervision after four. At their last court appearance, State Prosecution lawyer Sean Stocks asked for an immediate term of detention, but defence lawyers appealed for a community-based sentence. Mr Stocks said the duo took no steps to extinguish the fire. He said the Morley and Dianella boys were "drunk and stoned" and started lighting chairs surrounded by wood to watch them melt, thinking it was "a fun thing to do." "They had no business being in the school in the first place," Mr Stocks said. Mr Stocks said the teenagers, who were 15 and 16 at the time, left the burning chairs and were therefore criminally responsible for the $9 million destruction of the 100-year-old school's heritage and community. Defence lawyer Ben Tyers for the younger of the two boys said his client was genuinely remorseful for his actions and had a future if given the chance to serve his punishment in the community. Mr Tyers said it was a small fire that had got out of control and was lit by a boy, now 16, who was "inexperienced with fire." He said the teenager was currently employed with the prospect of starting an apprenticeship. SITE clearance works for Mt Lawley Primary School are on track to be finished by the end of this month as part of its $12.5 million rebuild. The school burnt down in July last year after two teenagers who were drunk and stoned started lighting plastic chairs on fire to watch them melt only for the blaze to engulf the entire campus. The teens were sentenced to eight months in detention this morning in the Perth Children Court. The Department of Education did not want to comment on the sentence, but said the rebuild of Mt Lawley Primary School was on schedule and budget. "The school is due to reopen for the 2015 school year," a department spokeswoman said. Site clearance works are continuing and will be completed at the end of April. The project is at the final documentation stage and construction is due to get underway in October. In the meantime, students are being taught in temporary classrooms on the oval of Mt Lawley Senior High School.