Leaks, gutters and roof aftercare, the small jobs that head off the big bills

Short answer: a leak caught at the flashing this week is a few hundred dollars. The same leak left two winters becomes thousands once it reaches the sarking, the batts and the ceiling. Gutters are licensed roof plumbing in NSW and part of the same waterproofing job as the sheet above them. A 10-year workmanship warranty covers our install; a 36-year manufacturer warranty covers the steel. Five small habits stop most of the big bills.

How leaks actually start, on Illawarra roofs

Almost every roof leak we are called to in the Illawarra is one of five things, and almost none of them are "the tile in the middle of the roof".

Flashings. The strip of metal or membrane where the roof meets a wall, a chimney, a skylight, a vent or a parapet. Flashings move with thermal expansion year after year and pull away from their seal. They are the number-one source of leaks on every roof type. The fix is rarely expensive if you catch it: remake the flashing properly, seal it correctly.

Box gutters and valleys. The deep channels where two roof planes meet, or where a roof runs into a parapet wall. They handle the highest water volume on the roof and they block with leaves, twigs, tennis balls. A blocked box gutter overflows backward under the roof sheets in a downpour, and that water ends up inside.

Pointing failure. On tile roofs, the cement between the ridge caps cracks and lets water track sideways under the caps. Modern flexible pointing lasts about 15 to 20 years. Old cement pointing is shorter. A failed pointing line on the ridge is the slow leak that explains most "we cannot find it" mystery damp patches.

Fastener rust. On metal roofs, the screws are usually the failure point before the sheets are. A weeping rust streak from each screw head is the warning; the leak follows when the screw rusts away entirely. Replacing the screws on a tin roof every 20 to 25 years buys you another lifetime out of the sheets.

A roof that has reached its end. Once a roof is past 30 years and the failures are widespread (not a single point), no patch holds for long. That is when the conversation shifts from leak repair to restoration or replacement.

Why gutters are a roofing job, not a handyman job

Under the NSW Plumbing and Drainage Act and the Plumbing Code of Australia, anything that carries storm water off a roof is licensed roof plumbing: gutters, downpipes, rainheads, box gutters, sumps, overflows, storm water connections. A cracked downpipe joint or an undersized rainhead in a coastal downpour is not a cosmetic problem; it is a structural waterproofing problem. The same logic applies in reverse: a beautifully restored roof above a sagging, leaf-packed, perished gutter still wets the eaves and the wall behind them.

A real roof inspection looks at the whole waterproofing system in one visit. If a quote does not mention the gutters at all, ask why before you sign.

What a 10-year workmanship warranty actually means

Two warranties run alongside any new metal roof, and they cover different things.

Product warranty (manufacturer): the steel. Colorbond carries a 36-year perforation warranty (it will not rust through) and a 25-year warranty against severe paint flaking, on standard residential applications. Terracotta tiles carry a 50-year breakage warranty on the tile body. These warranties are paper-thin and process-heavy: you make the claim to the manufacturer, the manufacturer assesses against installation standards, the manufacturer settles.

Workmanship warranty (the installer): the install. On a Ridgeline job that is ten years on the labour: any leak caused by our flashings, fasteners or sheet laps, fixed by us at no charge. It is the one we wrote; it is the one we honour; it is the only one you call us about. It does not cover storm damage beyond design (that is home insurance), it does not cover accidents on the roof, and it does not cover wear on the previous installer's work when we only restored over the top.

NSW law sits underneath both of these as the statutory floor: six years on major defects and two years on others, under the Home Building Act, regardless of what the warranty document says. You cannot contract out of that.

The five-minute habits that save thousands

• Clear the gutters twice a year. April before the wet season; October before fire season and the spring leaf drop. DIY if you can do it safely from a ladder on a single-storey eave; pay a gutter cleaner $250 to $400 for a two-storey or a complex roof.
• Trim overhanging branches back to at least one metre off the roof line. Eucalypts in particular drop bark and leaves into valleys and box gutters all year round.
• Walk the ceiling space with a torch the morning after a big rain event. Brown spots or darker patches on sarking or batts are a leak that has already started.
• Photograph your sound roof once a year from a few angles. Date the photos. Store them with your insurance documents. After a storm, the before-and-after comparison is the difference between a settled claim and a fight.
• Book the on-roof check at year five. A licensed roofer with a camera, half an hour on a sunny day, spots three or four small things you would not see from the ground. Fixing them at year five is a few hundred dollars; finding them at year fifteen is a few thousand.

What we do

Ridgeline writes the workmanship warranty into the quote in plain English (ten years on installs, in a single paragraph, not a fine-print PDF), uses licensed roof plumbers for every gutter and storm water line, and books an annual quick-look at no charge for any roof we have installed or restored. The aftercare is not a sales hook; it is how we end up still being your roofer in 2046. Most of our jobs are referrals from somewhere we worked five, ten, fifteen years ago. That only works if the work was right and the warranty was real.