The Haiti school collapse that killed at least 90 people and left hundreds more injured has sparked concern over the safety of many of the country's buildings.

Rene Preval, the president of Haiti, has called for a review of construction guidelines, warning it is not just schools that are in danger, but homes and churches too.

He has blamed continual government turnover and a lack of respect for the law for lax building practices.

The concrete Petionville school near Port-au-Prince collapsed Friday as up to 700 students, teachers and their families and friends enjoyed a party at the school.

Preacher Fortin Augustin, who ran the school, has been charged with involuntary manslaughter.

It is believed a structural defect and a lack of steel reinforcement caused the collapse and that the school was poorly rebuilt after a partial collapse eight years ago.

But even with the president's support, is it even possible Haiti will ever be able to ensure the safety of the millions who live in ramshackle slums across the country?

Petionville's parliamentary spokesman Stephen Benoit has proposed freezing government spending on cars and travel to remedy "anarchic construction".

But even he isn't optimistic this would change much. As he told AP: "We need a new city. This is one catastrophe - but we have many more to come".

In a country where building codes are ignored by builders and inspectors alike, what can they do?