About us

New Zealand's leading building and house wash exterior cleaning company.

Chemwash History

Chemwash Cleaning was formed in 1981, with the goal to utilise low pressure & environmentally-friendly detergents in the exterior house cleaning industry.

Our unique detergents were developed by a leading industrial chemist to be effective and safe for use in the environment, as well as around housing, pets and people.

Chemwash continues to grow and develop, improving our detergents and processes as we go. There are now over thirty franchises, spread across most regions of New Zealand, headed up by our national manager.

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Licensed Agents

Each Chemwash branch is operated with qualified, licensed agents, who have passed a series of stringent conditions and checks, including police background checks.

Chemwash is also fully insured, and we strive to offer the most up-to-date cleaning practices in the industry. All Chemwash staff undergo ongoing training in maintaining a safe and healthy workplace for customers. Many are ITO certified in height and fall arrest systems.

We ensure quality service through customised product and equipment application, regular inspections, and our quality guarantee.

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Low Pressure Cleaning

The Chemwash Low Pressure system is specialised for the cleaning of all exterior surfaces. It involves firstly applying our detergents, and then rinsing off with relatively low water pressure (about 600-1000psi, compared with 2000-5000+psi for a lot of water blasters).

Our fan spray nozzles eliminate the possibility of damage to surfaces, and low pressure washing also uses a lot less water than high pressure water blasters. This means that the Chemwash system is among the safest and most environmentally friendly exterior cleaning techniques.

Maintenance programmes may also include “Spray and Leave” treatment for roofs, concrete cleaning and house washing for mould & lichen.

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      You are always assured of our best service and a top-quality job. Our workmanship and your satisfaction are fully guaranteed.

      What our clients are saying


      Mt Victoria

      ⭐⭐⭐⭐⭐ "Just a quick message to say what a great job your guys did cleaning every nook and cranny of our place. It was sparkling like a new pin when we came home on Friday. It has been money worth spending when it comes to getting the house ready for selling. I will highly recommend your company to others. Many thanks to you and your hard working boys"