The Insurance Council is urging Cantabrians living in earthquake-damaged homes to contact it to arrange temporary repairs before winter.
A campaign has been launched by organisations including advocacy group CanCERN so people can have the approved work done at no cost to them.
CanCERN spokesperson Leanne Curtis says the work will not affect final insurance settlements or temporary accommodation allowances as in the past.
She says agencies including the Canterbury Earthquake Recovery Authority, the Christchurch City Council and the Earthquake Commission are helping cover the costs of repairs to an estimated 900 homes.
The Insurance Council says some residents may have slipped through the net because they don't want to highlight their situation or they believe others are worse off.
A spokesperson says the council wants to urgently hear from customers in need.