Danger of roof structure collapsing.

Roof structure collapse danger. Identified by Peter Weddell owner/operator of Qld Home Buyers Inspection service.

Danger of roof structure collapsing

A tiled roof supported off an undersized ceiling beam (binder) which is also causing sagging of the ceiling joists below.

This is a common fault with roof structures of many homes built in Brisbane around the 1940’s through to the 1980’s.

Danger of roof collapsing

With no support between the props this under-purlin is sagging considerably.

Roof structure-collapse danger could easily be rectified by fitting a Barap Bolt, if support could not be achieved off a nearby wall.

Barap Bolt roof support

This is what a Barap Bolt looks like

  • A threaded rod fitted below an under-purlin with props for support between the rod and purlin.
  • Brackets are secured to hips, underpurlins or rafters where props are placed below the brackets for support, off the internal walls.

Although no longer manufactured, they can very easily be fabricated.

Roof collapsing danger

Roof structure collapse danger. They don’t build them like they used to!

A poorly constructed roof structure above a Post War house, in a southern suburb of Brisbane.

  • The main beam (binder) supporting this roof is fractured considerably and dangerous!
  • Binders are not designed to support any part of a roof.
  • Others photos show significant sagging from inadequate support..
  • Roof structures must be supported off the internal walls (where possible) otherwise indirectly by other means of construction.

An extremely dangerous situation that required immediate restructuring of the roof.

Some related material that may be of use:

Queensland Government Technical notes on roofing

For independent Building Inspections Brisbane in all suburbs, Qld Home Buyers Inspection Service. qbis.com.au