Garage ceilings have been an issue for many years.
Noticeable signs are sagging ceiling, garage roller door jamming or a complete collapse. Common problems are storm water damage and poor workmanship.
Options to repair plaster garage ceilings are;
- Re-fixed using screws if not yet collapsed or sagging excessively – less expensive but not fully guaranteed.
- Better option is to fix wooden strapping along plaster joints using screws to garage ceiling joists in a cross pattern.
This option guarantees that garage ceiling is secure from collapsing.
With a total garage plaster ceiling collapse or extensive damage, the only option is to replace the collapsed section or entire plaster ceiling. When replacing the entire plaster ceiling I highly recommend fixing metal furring channels / metal battens at 450mm. centres (see pictures below) to truss joists that are often 600mm centres then fixing new plasterboard ceiling using screws and glue. This guarantees 100% workmanship. Of course this is the most expensive exercise.
For more technical information on plaster and plasterboard standards