Services — 05
Re-roofing & Replacement
End-of-life roof renewal delivered with precision, minimal disruption, and comprehensive documentation. LBP-supervised throughout.
When Replacement Is the Right Decision
When a roof reaches end-of-life — through age, extensive damage, or persistent leaks that repair can no longer address economically — replacement is the right call. We handle full roof replacements with careful planning, LBP-supervised installation, and complete documentation.
Roof Conversions — Tile to Long-Run Metal
Re-roofing is often the right time to change roofing systems entirely. We specialise in converting older tile roofs — including decramastic, pressed metal tile, concrete tile, and terracotta tile — to profiled metal roofing (long-run steel, also known as corrugated iron). This is one of the most cost-effective upgrades an Auckland homeowner can make.
Decramastic & Pressed Metal Tile
Decramastic tiles (pressed steel tiles coated in stone chip) were common in New Zealand from the 1960s through to the 1990s. They have a finite lifespan — often in the range of 30 to 50 years, depending on installation and maintenance — and when the coating deteriorates, the steel beneath rusts.
Conversion to long-run profiled metal offers a significantly lighter roof load, a cleaner profile, and a system that is straightforward to maintain and inspect. It also removes a common source of debris and moss accumulation that decramastic tiles are prone to.
Why convert rather than replace like-for-like:
- Profiled metal is lighter — reduces structural load on the building
- Longer lifespan with correct maintenance
- Simpler to inspect, clean, and repair
- Lower long-term maintenance cost
- Clean modern profile suits most Auckland residential and commercial buildings
Concrete & Terracotta Tile
Concrete and terracotta tile roofs are heavy. A typical tiled roof on an Auckland home can weigh in the order of 40 to 60 tonnes — significantly more than a profiled metal roof of equivalent area. When a tile roof reaches end-of-life, conversion to long-run metal is worth serious consideration: it removes substantial dead load from the structure and provides a roof with a longer expected lifespan.
Concrete tiles also require re-painting or re-coating to prevent moss and lichen growth, and individual broken tiles become harder to source as systems age out of production.
Benefits of converting to profiled metal:
- Dramatic reduction in roof weight — better for the building structure long-term
- No re-coating or painting required
- Easier to maintain; moss and lichen are less likely to establish
- No sourcing issues for replacement material
- May remove the need for structural remediation work
Both conversion types require a site assessment to confirm structural suitability and consent requirements. We provide a full written assessment and quote before any work begins.
Full guide: Decramastic & Tile Roof Replacement →
What’s Included
- Site assessment and consent assessment
- Detailed project plan, timeline, and budget confirmed in writing
- Safe removal and disposal of existing roof material
- Substrate inspection and repair (separately costed and approved)
- Installation to NZ Building Code standards (E2/AS1, B2) and Roofing Code of Practice
- LBP supervision and sign-off for restricted building work on residential properties
- H&S documentation for commercial projects (SSSP, SWMS)
- Post-installation inspection and sign-off
- Written warranty documentation (workmanship warranty terms confirmed per project before commencement)
- Record of Work (RoW) issued to homeowner on all restricted building work — as required under Building Act 2004 s.88. Included in CCC documentation where consent applies.
- Producer Statement PS3 issued at handover — confirming compliance with NZ Building Code; suitable for CCC applications and principal contractor records
What Happens When PPM Has Been Missed?
Most roofs that reach early end-of-life have one thing in common: they weren’t maintained. Lichen, blocked gutters, minor leaks left unattended, and failing sealants compound over years into structural problems that repair can no longer address.
If replacement is your outcome today, a PPM programme on your new roof is the single best investment you can make to avoid the same situation in 20 years. We include a PPM proposal with every replacement handover — at no obligation.
Solar-Ready Re-roofing
If solar is on your horizon, re-roofing is the ideal time to prepare for it. We can install with solar integration in mind — correct orientation, penetration positions, and fixing methods — at no significant additional cost. Retrofitting solar to a roof that wasn’t designed for it is considerably more expensive. Tell us at consultation.
The Process
Consultation
Site visit, condition assessment, material options, consent assessment.
Planning
Project plan, H&S assessment, budget confirmed in writing.
Removal & Substrate Prep
Old roof removed, substrate inspected and repaired.
Installation
LBP-supervised installation with site management and quality checks.
Handover
Final inspection, documentation, warranty, PPM programme discussion.