Your roof pushes water off. Your gutters and downpipes have to catch it and move it away from the house. When that system fails, water finds every weak point in your building — fascia rot, wet insulation, saturated garden beds against foundations, and eventually ceiling leaks. Getting the gutter system right is one of the cheapest, highest-value upgrades an Illawarra homeowner can make.
Signs your gutters need attention
You don't need to climb a ladder to spot most gutter problems. Look for:
- Water spilling over the front of the gutter during heavy rain (a classic sign of blockage or undersizing).
- Streaks or staining down the fascia and walls below the gutter line.
- Sagging sections where brackets have failed.
- Rust marks, holes, or joint leaks visible from ground level.
- Downpipes that don't discharge cleanly at the base — pooling around the house.
- Damp garden beds sitting hard against the wall, or moss growing on lower siding.
Any two of those together and your guttering is under-performing. Left alone, it graduates from a $500 repair into $5,000+ of fascia and ceiling damage.
Gutter installation — what a proper job looks like
There's more to installing guttering than just screwing metal to fascia. Done properly for the Illawarra climate, a new gutter system involves:
Sizing correctly. Illawarra downpour intensity is high, so gutters need to be sized for the actual catchment area of your roof. Undersized quad on a large roof overflows even when perfectly clean.
Setting the fall. Gutters need consistent fall toward downpipes — around 5mm per metre. Level gutters pool water, encourage corrosion, and drop leaves into stagnant puddles.
Correct downpipe count and placement. Long stretches of gutter with a single downpipe overwhelm the system in heavy rain. Every 12m of gutter typically needs its own downpipe. Corners often need dedicated downpipes.
Sealed joints. Every join, mitre, stop-end and downpipe outlet is sealed with roof-grade neutral-cure silicone rated for coastal exposure.
Correct fixings. Colorbond-compatible fasteners with neoprene washers, stainless steel where salt exposure is high, spaced to hold under the weight of a full gutter plus debris.
Colorbond, quad, half-round — choosing your profile
In the Illawarra we install three main profiles.
Quad is the modern default — clean lines, high capacity, wide colour range in Colorbond. Suits 90% of Illawarra homes.
Half-round is a heritage-look profile that suits older brick homes and federation styles. Slightly lower water capacity, so downpipe count needs to compensate.
Box / high-front gutters are used on some contemporary architectural homes and larger commercial roofs — very high capacity, but usually require internal drainage.
For coastal properties we recommend the Colorbond Ultra grade — it's specifically rated for marine environments and holds colour and integrity far better than standard steel near the water.
Downpipes — the part everyone forgets
Gutters are only half of the drainage story. Undersized or blocked downpipes overwhelm the gutter no matter how new the guttering itself is.
- Every 12m of gutter run should have its own downpipe.
- 90mm × 45mm rectangular is the residential default; round 100mm is used in higher-flow situations.
- Downpipes must discharge to stormwater or an approved soakwell — not just into the garden.
- Rainwater harvesting (tanks) requires first-flush diverters and inlet strainers.
Gutter repair — when replacement isn't needed
Not every gutter problem calls for full replacement. Common repair jobs we handle across the Illawarra include:
- Resealing leaking joints and mitres.
- Replacing rusted-through sections locally.
- Re-hanging sagging runs with new brackets and correct fall.
- Clearing and pressure-flushing downpipes.
- Fitting leaf guard / gutter mesh to reduce blockages.
- Adding new downpipes where the existing count is inadequate.
Leaf guard for Illawarra homes
For homes surrounded by gum trees, leaf guard pays for itself within a couple of years by eliminating the annual gutter clean and — more importantly — preventing the blocked downpipes that cause overflow and ceiling leaks. We install steel mesh systems suitable for both tile and Colorbond roofs, sized to keep out leaves, twigs and native wildlife.
Fascia repair and replacement
Once we pull down old, failing guttering we often find timber fascia soft or rotted from years of overflow. If your fascia looks tired, replace it while the guttering is off — it never costs less than at that exact moment. We install Colorbond fascia for a low- maintenance finish, or coordinate carpentry for timber fascia where the original detail matters.
Areas we serve across the Illawarra
Wollongong, Fairy Meadow, Corrimal, Bulli, Thirroul, Warrawong, Port Kembla, Dapto, Albion Park, Shellharbour, Shell Cove, Kiama, Kiama Downs, Jamberoo, Gerringong, Gerroa, Berry, Bomaderry and Nowra. Same crew, same standards across the whole region.
Why Willows Roofing for guttering
- Licensed roofing and roof-plumbing contractor.
- Family-owned local team — we're here for warranty callbacks, not disappearing.
- Free written quotes with itemised material and labour breakdown.
- Workmanship guarantee plus Colorbond manufacturer warranty on eligible products.
- Colour matching to your existing roof or fascia — critical for street appeal.
Book a gutter quote
Call 0436 443 898 for a free on-site gutter quote anywhere in the Illawarra, or fill in our quick quote form. If your guttering is currently overflowing during rain, don't wait — every storm you delay adds to the eventual fascia and ceiling repair bill.