When a roof is left to fail, water gets into battens and rafters and they rot; ceilings stain, sag and can collapse; insulation stops working; mould grows in humid roof spaces; damp timber attracts termites; and water near wiring and light fittings creates electrical hazards. Replacing a roof when it reaches the end of its life, rather than after the damage spreads, usually limits the work to the roof itself.
A roof protects everything under it
The roof is the first line of defence for the frame, ceilings, insulation, walls, wiring and contents. As long as it sheds water, the rest of the house stays dry. Once it starts letting water in, the damage spreads beyond the roof, often out of sight.
How damage progresses
Stage 1: Small leaks
A cracked tile, a lifted cap, a rusted lap or a failed flashing lets in water during heavy rain. At first it may only wet the sarking or a batten. You may not see anything inside.
Stage 2: Wet timber
Repeated wetting soaks battens and rafters. In the Gold Coast's humidity they stay damp for longer between storms. Fixings rust. Timber begins to rot, losing strength.
Stage 3: Ceilings and insulation
Water reaches the top of the ceiling. Insulation gets wet, compresses and stops working. Plasterboard stains, then softens and sags. Cornices crack.
Stage 4: Mould and pests
Damp timber and insulation in a warm, humid roof space are ideal for mould. Moist timber also attracts termites. Smells and health concerns follow.
Stage 5: Structural problems
Rotten battens can no longer hold tiles or sheets properly, and the roof line sags. Rafters weakened by rot may need repair or replacement. Saturated ceilings can collapse. Water may reach wall frames.
At each stage the bill grows: from a roof repair, to a roof replacement, to a roof replacement plus carpentry, ceilings, insulation, electrical work and painting.
Gold Coast factors that speed it up
- Storm season delivers intense bursts of rain that find every weak point.
- Humidity keeps timber damp and feeds mould.
- Salt air speeds corrosion of steel sheets and fixings near the coast.
- Termites are active in the region.
- Older housing often has original roofs that are well into the failing stage.
Warning signs to act on
- Ceiling stains, especially new or growing ones.
- Sagging or bubbling ceilings.
- Musty smells.
- Water marks or dark streaks on rafters in the roof space.
- Daylight through the roof.
- Damp or compressed insulation.
- A sagging ridge or wavy gutter line.
- Rust through steel sheets.
- Tiles crumbling or slipping.
See signs you need a roof replacement for detail.
Safety first
- Sagging ceilings: keep people out of the room; a soaked ceiling can fall.
- Water near electrics: turn off the affected circuit if safe and call an electrician.
- Asbestos: if an older roof or ceiling might contain asbestos and is damaged, do not disturb it.
- Do not climb the roof in wet or windy conditions.
The case for timing
There is a window when replacing a roof is the cheapest it will ever be: when the roof covering is failing but the battens, rafters and ceilings are still sound. Replace then, and the job is a roof replacement. Wait until the damage spreads, and it becomes a larger renovation.
Timing also gives you control:
- you can plan around storm season;
- you can compare quotes properly;
- you can budget or arrange finance;
- you avoid emergency call-outs and temporary tarps.
Repair versus replace
Not every leak means a new roof. A sound roof with an isolated problem needs a repair. The question is whether the roof as a whole is near the end of its life. If repairs keep coming, or the roof covering is failing everywhere, replacement prevents the damage spreading.
What a replacement fixes
A roof replacement is the chance to:
- replace rotten battens and repair rafters;
- bring tie-downs up to the house's wind classification;
- add a blanket or sarking;
- improve roof-space ventilation;
- replace corroded gutters and flashings;
- remove asbestos safely, if present.
Insurance
Many policies cover sudden storm damage but exclude gradual damage and wear. If a roof has been leaking slowly for years, a claim for resulting damage may be declined. Keeping the roof maintained, and replacing it when it reaches the end, protects your cover as well as your house.
Next step
If you have seen any warning signs, get the roof inspected, including the roof space. Call 07 5241 1403 or use the form below. Prices are on the cost guide.
General information about roofs on the Gold Coast, not advice about your roof. Rules, products and programs change; check with the body named (QBCC, City of Gold Coast, Workplace Health and Safety Queensland) before you act.