Roof repairs in Hornsby and the Upper North Shore

Water coming through a downlight, a dark ring on a cornice, or a drip you only hear at night. Roof leaks on the Upper North Shore rarely announce themselves from outside, which is why the first job is finding where the water actually enters, not where it lands.

Call (02) 9000 1127 for a free inspection. Someone gets on the roof, photographs what they find, and you get a written quote with the reasoning attached.

Reading the symptom before touching the roof

Different leaks behave differently, and the pattern tells you a lot before anyone climbs a ladder.

Only in long, heavy rain

This is the classic leaf-country leak. A valley half-full of gum litter or a gutter holding a wet mat copes with a short shower, then backs water up over the valley tray or behind the fascia once the rain keeps coming. The fix is drainage, not a patch.

Near a chimney, skylight or where an addition meets the old roof

Junctions are where roofs fail. Lead or metal flashings that were never dressed properly, step flashings that have lifted, or a mortar fillet that has cracked out will let water in at the worst possible point. Older Hornsby and Normanhurst houses with a 1980s extension are a common version of this.

A stain that appears weeks after the rain

That is often condensation or a slow track through sarking rather than a direct leak, and it is a different repair again. Poor roof-space ventilation under a dark tile roof will do it.

The repairs we carry out most

• Valley replacement and re-lay. Lifting the tiles either side, replacing a corroded or holed valley tray, and re-laying with the correct clearance so leaves wash through instead of damming.
• Flashing repair and replacement at chimneys, parapets, skylights, vent pipes and roof-to-wall junctions.
• Ridge capping rebedding and repointing where the old mortar has gone sandy and caps are loose underfoot.
• Cracked, slipped and broken tile replacement, including matching older profiles where stock allows.
• Sarking repairs where a previous trade has torn it or where none was ever installed.
• Gutter and downpipe repairs, from re-levelling a section that has lost its fall to replacing a rusted run. More on that on the gutter repair and replacement page.
• Leak tracing in roof spaces where the cause is not obvious from above.

What repairs look like on each roof type

Terracotta. The inter-war and Federation terracotta over Beecroft, Cheltenham, Wahroonga and parts of Pennant Hills is tough but brittle, and it breaks under careless feet. Repairs mean walking the roof properly, replacing cracked tiles rather than sealing them, and rebedding caps with the right mortar mix.

Concrete tile. The 1960s and 70s homes through Asquith, Mount Colah, Berowra Heights and Hornsby Heights are mostly concrete. These roofs age by losing their surface coating and their pointing long before the tiles fail. Once a roof reaches that stage, a full roof restoration often costs less than repeated individual repairs.

Metal and Colorbond. Repairs here are about fixings, laps and flashings. Rusted screws, washers that have perished, sheets lifted by wind, and flashings sealed with silicone instead of being formed properly. Corrosion is worth taking seriously down at Brooklyn and along the Hawkesbury, where the air carries salt.

Make-safe first when it is actively leaking

When water is coming in right now, the sequence is different: get it stopped, then fix it properly in dry conditions. Tarping, temporary flashing and clearing the immediate blockage are the first visit; the permanent repair is scheduled once the roof is dry enough to work on and the real extent is visible. See storm and emergency roof repairs for how that runs.

Call (02) 9000 1127 if water is coming through now.

The tree above the roof

A lot of repairs up here are really tree problems. Limbs scraping tiles loosen them, falling branches crack them, and the canopy keeps the roof permanently damp and shaded so moss and lichen take hold.

Hornsby Shire protects trees on private property through its tree and vegetation preservation controls, made under the state vegetation planning policy, and pruning or removing a tree generally needs a permit, with a short list of exempt species. So the honest advice is: do not have someone quietly take the limb off over the roof. Deal with the roof, and apply to Council separately if the tree genuinely needs work.

What a repair costs

Nobody can price a roof repair accurately from a phone description, and anyone who does is guessing. What moves the number:

• Extent. One cracked tile is a different job from a valley that has been leaking into the ceiling for two winters.
• Access. A single-storey Waitara roof off a ladder is quick. A steep, two-storey Hornsby Heights roof dropping away down the block needs more setup and more safety gear.
• Material. Matching older terracotta takes time and sometimes salvage sourcing.
• Pitch and height. Steeper and higher means slower, always.
• Consequential damage. Soaked insulation, stained plasterboard and rusted battens all add scope.

You get a free inspection and an itemised written quote before any of it starts, and completed work carries a written workmanship warranty. No pressure, no obligation, no chasing calls afterwards.

Where we repair roofs

Right across Hornsby and the Upper North Shore: Hornsby and Waitara, out through Thornleigh and Westleigh, north to Mount Colah, Berowra and Cowan, and up to Brooklyn on the river.

Call (02) 9000 1127 or send the quote form and describe what you have noticed. A photograph of the stain helps more than you would expect.