A1 Advanced Exterior Plastering is a Christchurch-based exterior plastering company delivering premium plaster systems for new builds, recladding projects, and exterior repairs and repaints. The team holds over 70 years of combined experience and is made up of Licensed Building Practitioners, making them one of the most credentialled plastering outfits in the region.
The company holds SiteWise Gold accreditation with a 100% rating, and is an Approved Applicator for New Zealand's leading exterior plaster system manufacturers including Rockcote, Sto, Dulux, Hebel, Equus, and Specialised. This means they can recommend and install the right system for your specific home — not just the one they know.
A1 Advanced Exterior Plastering is part of the A1 Group, a collective of specialist trade companies that includes A1 Projects (builders and project managers), A1 Decorating (award-winning master painters), and A1 Protect (property maintenance). This means clients get access to a full in-house team across the entire project — from initial consult through to final coat — with no need to source and coordinate separate trades.
Their process is straightforward: they visit your property, assess your exterior, explain your options clearly, and provide a tailored quote. From there, they handle everything — scaffolding, installation, coordination with painters and builders — delivering a compliant, high-performance finish. They also advise on ongoing system maintenance requirements to protect manufacturer warranties, which typically include annual soft washes and repaints every 5–10 years.
Trusted by Christchurch builders including Onyx Homes and Ainsworth Builders, A1 Advanced Exterior Plastering is based at 1/5 Newton Street, Bromley, Christchurch.
When it comes to exterior plastering in Christchurch, A1 Advanced Exterior Plastering has built a reputation that speaks for itself. Trusted by the city's top builders and respected by homeowners across the region, this licensed team delivers high-performance exterior plaster systems with full project management from first quote to final coat.
Backed by over 70 years of combined experience, the team holds Licensed Building Practitioner (LBP) status, a SiteWise Gold 100% rating, and certified applicator status across New Zealand's leading exterior plaster system manufacturers — including Rockcote, Sto, Dulux, Hebel, Equus, and Specialised.
A1 Advanced Exterior Plastering covers the full spectrum of exterior plastering work. For new builds, they work alongside builders — or bring their own — to specify and install the right system from the ground up, ensuring compliance and a quality finish. For existing homes, they handle recladding and renovations, coordinating everything from consent to completion. And for homes that just need a refresh, their repairs, reseals, and repaints service keeps systems protected and warranties intact.
The process is deliberately straightforward. The team visits your property (or reviews plans for a new build), assesses your exterior, and explains your options in plain language. From there, they put together a tailored quote and manage everything — scaffolding, licensed plasterers, painters, and builders — so you don't have to chase multiple trades.
A1 Advanced Exterior Plastering is part of A1 Group, a collective of specialist trade companies operating under one roof. That means clients get access to A1 Projects (builders and project managers for complex reclads and renovations), A1 Decorating (award-winning master painters for exterior repaints and interior work), and A1 Protect (property maintenance experts who manage ongoing warranty upkeep, soft washes, and condition checks).
This integrated model matters in practice. Exterior plaster systems require specific paint products, prep, and timing to maintain their warranty — something that can easily go wrong when trades aren't coordinated. By keeping painters and plasterers in-house, A1 Group eliminates that risk.
Not every home suits exterior plastering, but when the conditions are right, the benefits are significant. A well-installed system improves thermal performance — keeping homes warmer in winter and cooler in summer — while also reducing noise from traffic and neighbours. Visually, it delivers clean, seamless lines that lift street appeal. Maintenance is relatively low: an occasional soft wash and repaint every five to ten years is typically all that's needed, with no flaking or peeling in between.
Owners also report long-term value gains, with a properly maintained exterior plaster finish protecting the building envelope and adding to resale appeal.
Clients from Christchurch homeowners to commercial builders like Onyx Homes have praised the team's workmanship, reliability, and communication throughout the process. General Manager Paul Prendergast leads a team that includes Licensed Building Practitioners, a dedicated project manager, office manager, foreman, and a crew of exterior plasterers — all based at 1/5 Newton Street, Bromley, Christchurch.