Roofing Meadowbank

Concrete tiles from the 1960s–80s are now 45–55 years old, well into or past their reliable service life. OneRoofing assesses condition by checking: percentage of cracked or slipped tiles; surface coating loss (spalling); condition of ridge and hip mortar bedding; valley iron corrosion; and underlay (sarking) integrity. If more than 15–20% of tiles are structurally compromised, or if the valley iron and sarking are also failing, full replacement with long-run Colorsteel is more cost-effective over a 10-year period than ongoing repair and maintenance. We provide a written assessment with clear repair vs. replacement costings so you can make an informed decision.

Re-bedding replaces the deteriorated cement mortar bed that the ridge and hip cappings sit on. Over 30–40 years, the original mortar dries, cracks, and washes out, allowing ridge caps to rock, lift, or fall. Re-bedding involves removing all cappings, grinding off old mortar, applying a fresh cement bed, resetting the cappings to the correct alignment, and then re-pointing with a flexible polymer compound (not rigid mortar) that accommodates thermal movement without re-cracking. OneRoofing includes re-bedding and re-pointing in all Meadowbank roof painting packages where the main tiles are still structurally sound. As a standalone service, re-bedding and re-pointing typically costs $800–$2,500 for a standard Meadowbank home.

Yes. Valley iron replacement is one of the most frequently requested standalone repairs in Meadowbank. Failed valley iron (typically galvanised steel that has corroded after 30–40 years) allows water to migrate laterally under the tile laps and drip directly into the ceiling space. OneRoofing replaces valley iron with pre-painted Colorsteel valley sections in a matching colour to the existing roof. Valley iron replacement typically costs $450–$1,200 per valley depending on length and access, and can be completed as a standalone repair or as part of a broader roof restoration package.

Yes. Garage and carport flat roof replacement is a regular service in Meadowbank, where 1960s–80s homes commonly have attached garages with low-slope or flat roofs that have outlasted their original bitumen-based waterproofing. OneRoofing replaces these with TPO (thermoplastic polyolefin) hot-welded membrane systems that are fully seamless, carry a 20-year manufacturer warranty, and comply with NZ Building Code Clause E2 for low-slope roofing. We also correct fall and drainage during replacement to prevent ponding, which is the primary cause of premature membrane failure.