Roof trusses bowing and their danger, in Forest Lake a Southern suburb of Brisbane.
Danger from bowing roof trusses. The buyer was made aware and got a reduction in the buying price to be compensated for this serious and potentially dangerous problem. QBIS.
Sideways bowing of roof trusses:
- Roof trusses supporting this concrete tiled roof were bowed sideways considerably, some as much as 100 mm.
- This degree of bowing far exceeds the acceptable tolerance level
- Potentially making the roof structure structurally unsound.
- The roof structure could collapse in differing weather conditions.
Roof trusses are not designed to take sideways pressure.
Previous inspection report omitted bowing of roof trusses:
This major fault was not identified in the previous building inspection report carried out for the current owners/sellers, this omission cost them a sale!
- Remove roof tiles.
- Straighten and reinforce the roof trusses.
- Remove insulation (if fitted).
- Remove and replace ceiling linings where necessary.
- Repaint ceilings and walls.
This would be costly and disruptive as it would not be achievable safely with the owners still occupying the house.
Alternative solution to bowing roof trusses.
- Replace roof tiles with light weight metal roof sheeting.
- Fit more securing to the roof structure for tying down.
- Fit larger roof battens for sheeting support.
- Straighten the roof trusses (reinforce if necessary).
- Resecure or replace ceiling plaster where required.
Recommend fitting insulation below the roof sheeting.
Some examples showing the importance of employing a competent independent building inspector with practical solutions to a serious fault.