Quick Answer: Soft washing uses low-pressure water (under 500 PSI) combined with cleaning solutions to gently remove dirt, mould, and algae from delicate surfaces like weatherboards and roofs. Pressure washing uses high-pressure water (1,500-4,000+ PSI) to blast away heavy grime from durable surfaces like concrete and brick. For most Auckland homes, soft washing is the safer, longer-lasting choice for exterior cleaning.
What’s in This Guide
- What Is Soft Washing?
- What Is Pressure Washing?
- Key Differences: Soft Wash vs Pressure Wash
- Which Method Is Best for Different Surfaces
- Why Choose Suds Wash Co
- Frequently Asked Questions
What Is Soft Washing?
Soft washing is a cleaning method that combines low-pressure water with specialised cleaning solutions to safely remove organic growth like mould, algae, lichen, and moss from your home’s exterior. The pressure typically stays under 500 PSI – similar to a garden hose with a spray nozzle.
How Soft Washing Works
The cleaning solutions do the heavy lifting, not the water pressure. A biodegradable mix of surfactants and sanitisers is applied to the surface and left to dwell for several minutes. This breaks down organic contaminants at the root level before being gently rinsed away.
Benefits of Soft Washing
- Safe for delicate surfaces: Won’t damage paint, weatherboards, or roofing materials
- Kills growth at the source: Prevents rapid regrowth of mould and algae
- Longer-lasting results: Surfaces typically stay cleaner for 2-3 years
- Eco-friendly options: Biodegradable solutions available that meet NZ environmental standards
What Is Pressure Washing?
Pressure washing uses high-pressure water to blast away dirt, grime, grease, and built-up debris from hard surfaces. The pressure ranges from 1,500 to 4,000+ PSI, which is strong enough to strip paint or damage softer materials if used incorrectly.
How Pressure Washing Works
A motorised pump forces water through a concentrated nozzle at high velocity. The sheer force of the water dislodges and removes contaminants. Some pressure washers can also heat the water (power washing) for extra cleaning power on grease and oil.
Benefits of Pressure Washing
- Fast and powerful: Quickly removes heavy grime, oil stains, and built-up dirt
- Great for hard surfaces: Concrete, brick, and stone can handle the pressure
- No chemicals needed: Water pressure alone often does the job
- Cost-effective for driveways: Quick turnaround for large concrete areas
Key Differences: Soft Wash vs Pressure Wash
| Aspect | Soft Washing | Pressure Washing |
|---|---|---|
| Pressure | Under 500 PSI | 1,500-4,000+ PSI |
| Cleaning Method | Chemical solutions + low pressure | High-pressure water force |
| Best For | Roofs, siding, weatherboards, decks | Concrete, brick, stone, driveways |
| Risk of Damage | Very low | High on delicate surfaces |
| Results Duration | 2-3 years (kills growth at root) | 6-12 months (growth may return faster) |
Which Method Is Best for Different Surfaces
Use Soft Washing For:
- Roofs: Concrete tiles, metal roofing, and shingles are all safely cleaned with soft washing. High pressure can crack tiles or remove protective coatings.
- Weatherboards: Whether timber or vinyl, soft washing protects paint and prevents water being forced under the cladding.
- Stucco and plaster: These porous materials can be damaged by high pressure, leading to chips and cracks.
- Painted surfaces: Soft washing preserves your paintwork while removing the mould that’s growing on it.
- Timber decks: Prevents wood fibres from being raised or damaged while still removing moss and algae.
Use Pressure Washing For:
- Concrete driveways: Durable enough to handle high pressure, and the force removes tyre marks and oil stains effectively.
- Brick paths and patios: Hard-fired brick can withstand pressure washing (avoid on old or soft brick).
- Natural stone pavers: Most stone is tough enough for pressure washing, though lower settings are wise.
- Garage floors: Grease, oil, and automotive grime respond well to high-pressure cleaning.
Auckland’s Climate Matters
Auckland’s humid subtropical climate creates ideal conditions for mould, algae, and lichen growth. Our mix of warm temperatures and frequent rain means organic growth spreads faster here than in drier regions. Soft washing’s ability to kill spores at the source makes it particularly effective for Auckland homes, providing longer-lasting protection against regrowth.
Why Choose Suds Wash Co for Your Auckland Home
At Suds Wash Co, we understand that Auckland homes face unique challenges from our humid climate. Our pressure washing services in Auckland include both soft washing and traditional pressure washing options, so we can match the right method to each surface on your property.
What Sets Us Apart
- Trained technicians: Our team knows which method to use for every surface type
- Eco-friendly solutions: Biodegradable cleaning products safe for your garden and pets
- Full exterior service: We handle roofs, walls, driveways, decks, and more in one visit
- Satisfaction guaranteed: We don’t leave until you’re happy with the results
Ready for a cleaner home? Get a free quote and we’ll recommend the right cleaning method for your property.
Frequently Asked Questions
Is soft washing safe for my roof?
Yes, soft washing is the recommended method for cleaning roofs. The low pressure won’t damage tiles, metal, or shingles, and the cleaning solutions kill moss and lichen at the root level to prevent quick regrowth.
Will pressure washing damage my weatherboards?
It can. High pressure can strip paint, raise wood grain, and force water under your cladding. For weatherboards and siding, soft washing is the safer choice that still delivers excellent cleaning results.
How long do soft washing results last?
Typically 2-3 years, depending on your property’s exposure to shade and moisture. Because soft washing kills organic growth at the spore level, it takes longer for mould and algae to return compared to pressure washing alone.
Can I pressure wash my wooden deck?
It’s possible, but risky. High pressure can damage the wood fibres and create a rough surface that’s prone to splinters. We recommend soft washing for timber decks, followed by a sealant application for best results.
Which method is more eco-friendly?
Both can be eco-friendly when done correctly. Soft washing uses biodegradable cleaning solutions designed to break down safely. Pressure washing uses no chemicals but requires more water. At Suds Wash Co, we use environmentally responsible methods for both approaches.
How much does soft washing cost in Auckland?
Costs vary depending on the size of your home and surfaces being cleaned. Most Auckland house washes range from $300-$800. Contact us for a free quote based on your specific property.
