Corey Tarrant
Owner of CTR Roofing Ltd in Hamilton. Corey has been roofing in the Waikato since 2010, specialising in metal roofing on homes, farms and commercial buildings.
- Licensed Building Practitioner, Roofing class, licensed by MBIE
- RANZ member (Roofing Association of New Zealand)
- Roofing in the Waikato since 2010
- Based at 12A Empire Street, Frankton, Hamilton
About Corey
Corey owns and runs CTR Roofing Ltd, a Hamilton roofing business working across the Waikato. His work covers metal roofing from homes to farm buildings and commercial and industrial jobs, with most of it in re-roofing: taking off old iron or tiles and putting on new longrun steel.
On CTR jobs:
- the roofing is COLORSTEEL MAXAM®, inland or coastal
- the installers hold LBP Roofing licences, and CTR supplies a Record of Work on every consented job
- most homes are re-roofed in 2–4 days
- new builds are quoted straight from the building plans, with start dates set to fit the build programme
What his licence covers
In New Zealand, roofing work that needs a building consent and affects a home's weathertightness is restricted building work. It must be done or supervised by a Licensed Building Practitioner with the right licence class, and the LBP has to provide a Record of Work when it's finished. Corey's Roofing licence covers that work. You can check any roofer's licence on the public LBP register. More in does a roofer need to be an LBP?
How CTR's guides are written
CTR's roofing guides are written by Corey and the CTR Roofing team. Each one:
- links its sources, mainly the NZ Metal Roofing Manufacturers' Code of Practice, MBIE and COLORSTEEL
- uses the same prices as the re-roof cost guide
- shows the month it was last updated
The FAQ pages give general information only. Anything said about CTR's own work is what Corey has confirmed.
Guides by Corey
Longrun roofing in the Waikato
Profiles, sheet lengths, the steel and installed prices.
COLORSTEEL roofs explained
MAXAM, warranty by environment, and what to check on a quote.
Steel roofs near the coast
How far from the sea each warranty applies, and the fixings that don't mix.
The biggest problem with metal roofs
Why leaks start at flashings and fixings, and the other downsides.
Re-roofing Hamilton's 1950s–70s homes
Corrugate or rib, and what turns up under the old iron.
New roof costs and choices
A new roof against a coating, and the cost per year of roof life.
Browse every question in the re-roofing FAQs.
Updated November 2026.