About Us.
Roofmasters — Certified Seamless Membrane Roofing Experts in Christchurch
Roofmasters are Christchurch’s commercial roofing and waterproofing specialists, providing complete solutions for seamless membranes, re-roofing, longrun metal, and flat roof waterproofing.
Led by Trevor Keast, a Licensed Building Practitioner with over 27 years of industry experience, our team combines hands-on expertise with technical certification to deliver durable, compliant, and warrantied roofing systems across Canterbury and the South Island.
From new installations and replacements to maintenance and leak prevention, every project is carried out safely and to the highest New Zealand Building Code standards.
Meet Trevor Keast.
Trevor Keast, the managing director of Roofmasters Christchurch, is a Licensed Building Practitioner holding all seven New Zealand roofing certifications.
With more than 27 years of hands-on experience, Trevor has worked on everything from commercial membrane systems and long-run metal replacements to architectural waterproofing projects throughout Canterbury and the South Island.
His deep technical knowledge of liquid-applied membranes, rubber and TPO systems, and complex roof detailing ensures every Roofmasters project meets NZ Building Code E2/AS1 and manufacturer standards.
Trevor leads a close-knit team of certified installers and foremen who share his focus on safety, quality workmanship, and long-term reliability—the principles that have built Roofmasters’ reputation as one of Canterbury’s most trusted commercial roofing specialists..
Our seamless membrane is a single-layer system that is available in varying thicknesses and with different warranty periods.
1mm
10
YEAR WARRANTY
15
YEAR WARRANTY
1.5mm
20
YEAR WARRANTY
2mm
Trust us to protect what matters most to you—your property.
Choosing Roofmasters means you are opting for a roofing partner who values integrity, quality, and safety.
Whether you're looking to install a new roof, repair an existing one, or require specialised roofing services, Trevor and his team at Roofmasters are equipped to provide lasting solutions.
Before
After
At Roofmasters, we prioritise health and safety above all else with all staff extremely proficient in harness work.
Our extensively trained team, backed by robust insurance policies, prioritises safety as a core part of our ethos, protecting both our clients and staff.
We ensure that all projects are completed to the highest standards, within the set timeframe and budget, with meticulous attention to safety. Adhering strictly to health and safety regulations, we maintain site-wise and site-safe registrations and qualifications.
Trevor holds a Class B Asbestos certificate, equipping him to assist with asbestos removal or encapsulation safely and efficiently.
From those who know us best.
Let us help you protect your investment.
Contact us to discuss how we can assist with your roofing needs.