What services does Chemwash Manawatū offer?
We offer a full range of soft washing and exterior cleaning services, including:
- House washing
- Roof cleaning and roof treatments
- Gutter and downpipe clearing
- Decks, fences and wooden surfaces
- Concrete, paths, driveways and paving
- Exterior windows and solar panels
- Commercial buildings, shop fronts, multi-storey structures
No job is too big or too small — if it’s outside, we can usually clean it.
Why choose Chemwash Manawatū?
With over 40 years of experience, Chemwash is a family-owned business renowned for personalised service and exceptional results. The first to develop soft-washing techniques, we pride ourselves on the long-term relationships we’ve built with clients who trust our expertise and process. High-quality results have always been our guarantee.
How do you clean — what methods and products do you use?
We use a low-pressure soft-wash system, which is gentler and safer than high-pressure water blasting. Our specially formulated, environmentally friendly detergents break down dirt, mould, moss, algae and lichen before we rinse using controlled low pressure.
This protects delicate surfaces such as paint, cladding, timber, roofing, seals and fixtures.
Our cleaning solutions are non-toxic and safe for people, pets and vegetation.
How often should I get my property cleaned?
Most homes benefit from a professional exterior wash once a year. Homes exposed to moisture, coastal winds, tree cover or heavy pollution may require cleaning every 6–18 months. Concrete, driveways and paths often need cleaning every 12–24 months depending on use and weathering. We can recommend a care schedule based on your home and environment.
If mould, algae or grime become visible sooner, it may be time to book a clean.
Is soft-washing safe for all surfaces?
Yes. Soft-washing is suitable for wood, painted surfaces, plaster, brick, vinyl, metal and tile roofs, and most exterior materials. It is specifically designed to protect your paint, coatings, and exterior surfaces. It removes contaminants without harsh abrasion. In many cases, regular washing can extend the life of your paint by preventing mould buildup and premature degradation.
Are your cleaning products safe for pets, people and the environment?
Yes. Our detergents are non-toxic, biodegradable and designed to be safe around gardens, pets, people and outdoor areas. Our soft-wash method also uses less water than standard water blasting.
What’s the best time to wash my house?
House washing can be done year-round, but the best time is typically spring or early summer. This removes winter mould and pollen buildup and prepares your home for the warmer months. However, our soft wash system is effective in all seasons.
Do you clean rural properties and farm buildings?
Yes. We clean rural homes, sheds, barns, farm buildings, implement sheds, dairy sheds, and more.
Do you clean gutters and downpipes?
Yes, we clear gutters and downpipes to improve drainage and prevent overflow, leaks and water damage. Regular gutter maintenance helps protect roofs, fascia, foundations and exterior walls.
Do you clean decks, fences, concrete and paths too?
Absolutely. Decks and fences are cleaned using our gentle soft-wash method, removing mould, grime and algae without damaging timber. Concrete, driveways and paved areas are treated to remove stains, moss, oil, mildew and slippery buildup. Chemwash effectively removes moss, lichen, and other organic growth from hard surfaces, helping to keep them clean and safe.
What results should I expect — will my home look noticeably better?
Yes. Clients consistently see a significant difference after cleaning. Exterior washing restores paint colour, removes heavy grime, brightens concrete and pathways, freshens decks and improves overall street appeal.
Regular washing also prolongs the life of paintwork and exterior materials.
Do I need to be home during the service?
No. As long as we have access to the exterior of your property, you do not need to be home. We will notify you once the job is complete.
Do you offer a guarantee on workmanship?
Yes. Chemwash Manawatū stands behind the quality of our work. If you're not satisfied, we’ll fix it — simple as that.
How do I get a quote or book a service?
Simply request a free, no-obligation quote via our website or call us. We cover residential and commercial cleaning across the Manawatū region including Feilding, Awahuri, Bunnythorpe, Rongotea, Sanson, Shannon, Turitea, Tokomaru, Ashhurst, Woodville, Dannevirke, Eketahuna and Pahiatua.
Do you clean roofs when they are tiled, metal or Colorsteel?
Yes — we clean metal, corrugated iron, Colorsteel and tiled roofs safely using soft-wash detergents and low pressure. We avoid harsh washing that can crack tiles or strip protective coatings.
What is the difference between a roof wash and a roof treatment?
A roof wash physically removes surface dirt and moss using controlled low-pressure rinsing. A roof treatment is a no-pressure application that kills growth over time and helps keep your roof cleaner for longer. We can advise which option suits your roof best.
How long does a roof treatment take to work?
Roof treatments begin killing organic growth immediately but results develop over time. Most roofs clean up gradually over 3–12 months depending on the severity of moss and lichen and the type of roofing material. Roof treatments are a cost-effective, low-impact alternative to high-pressure washing.
Is high-pressure blasting ever used?
Only when appropriate. We use higher pressure only on durable surfaces like concrete, driveways and some paved areas. We never high-pressure blast roofs, paintwork, cladding, timber or delicate exteriors.
Can I book an annual maintenance plan?
Yes. Annual plans can include house washing, roof treatments, gutter clearing, deck cleaning, concrete cleaning and more. These plans are tailored for your home's specific needs, helping to maintain your property, reduce long-term costs and ensure predictable upkeep.
What preparation is needed before cleaning?
We recommend:
- Closing windows and doors
- Moving outdoor furniture and delicate items
- Keeping pets indoors
- Informing us of leaky windows, fragile areas or access concerns
We handle the rest.
Are there surfaces or materials you don’t clean?
We avoid washing:
- Heavily degraded or flaking paint unless you are planning to paint your home
- Fragile or unsafe roof areas
- Surfaces with structural issues
- Certain heritage materials that require specialist care
We always assess and advise the safest approach before starting.
Will cleaning remove mould and moss permanently?
We offer spray and leave treatments which kill mould, algae and lichen at the root, giving a longer-lasting result than water blasting. Regrowth depends on environmental conditions, so maintenance is still recommended every 6–18 months.
What happens if it rains after cleaning?
Rain does not affect the results of a completed soft wash. For roof treatments, rain actually helps activate and distribute the product. If weather conditions are unsuitable, we’ll be in touch to reschedule.
Are you insured and trained for working at heights?
Yes. Our team is fully insured and trained in safe roof access, ladder use, harness systems, first aid and chemical handling.
Do you offer commercial or repeat-service contracts?
Yes, including services for property managers, body corporates, schools, retail, industrial buildings and multi-unit residences. We can create custom schedules for routine maintenance.
What environmental practices do you employ and are your products safe for the environment?
We care about our precious planet and do everything in our power to protect it. In fact, Chemwash was the first exterior cleaning company to use environmentally safe detergents and plenty of others have now followed suit. Our services and products not only lift dirt and grime from surfaces but are also 100% safe for use around animals and plants. We also ensure that any water run-off is returned to the environment by using water redirection practices and sediment filtration systems whenever necessary.
Do you use sustainable practices?
Yes, we reduce, reuse and recycle whatever we can, provided it doesn’t impact our Health and Safety Practices. Our office has separated recycling, and we give our second-hand electrical equipment to the Hospice.
Do you offer different pricing tiers or flexible options?
Yes. We provide tailored quotes and offer packages such as:
- Basic house wash
- Full exterior bundle
- Roof treatment + house wash combos
- Commercial maintenance schedules
- Annual property plans with AfterPay-style payment plans or upfront discounts.
We also offer 15% Gold Card discounts on all services for the elderly members of our community.
