So you think nothing can go wrong with a roof ?
Try looking at a few of these links:
Roof collapse disrupts funeral services
A roof collapse has halted services at Carmountside Crematorium.
Paris Roof Collapse Kills Five
At least five people have been killed and three hurt after a roof collapsed at Paris Charles de Gaulle airport. The reason for the collapse in terminal 2E, a newly-constructed part of France's biggest international airport, was not immediately clear.
Newtown swimming Pool closed as roof collapse investiagted
Kings Cross and London Bridge Stations Closed due to roof collapse
Scarisbrick Village Hall Roof collapse
Homes Evacuated after roof collapse
Matlock Lido closed for roof collapse investiagtion
Roof Collpase in West Bromwich
Roof Collpase at European Parliament
A Google search for "roof collapse" revealed over 875,000 references on 13 Feb 2010.