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Best Exterior House Wash

Emma Green

Senior reporter

★★★★★5.0

500+ views

Today

6 min read

Looking for the best exterior house wash? We tested Oxy, MOLD, Simple and 2 more top brands.

Our Top Picks

Best Overall

Oxy Solve House and Siding Pressure Washer Cleaner - Removes Stains from Mold & Mildew on Vinyl, Aluminum, Wood, Brick, Stucco - Concentrate 1 Gal.

★★★★★★4.8

Cleaning Power:High Cleaning Power

Coverage Area:Large Coverage Area

Surface Compatibility:All Siding Types

Application Method:Pressure Washer

Chemical Safety:Peroxide Based

Concentrate Ratio:1:4 Concentrate Ratio

Powerful oxygen-based cleaner removes mold and mildew fast on any exterior surface with no scrubbing needed.

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Best Value

MOLD ARMOR 64 oz. E-Z House

★★★★★★4.5

Cleaning Power:Moderate Cleaning Power

Coverage Area:Medium Coverage Area

Surface Compatibility:Most Exterior Surfaces

Application Method:Spray or Pressure Wash

Chemical Safety:Low Toxicity

Concentrate Ratio:Ready to Use

Affordable, easy-to-use formula cleans and brightens siding without rinsing—great value for quick outdoor refresh.

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Best Premium

Simple Green Oxy Solve Total Outdoor Pressure Washer Cleaner – 1 Gal

★★★★★★4.9

Cleaning Power:Maximum Cleaning Power

Coverage Area:Extra Large Coverage

Surface Compatibility:All Outdoor Surfaces

Application Method:Pressure Washer Only

Chemical Safety:Eco Friendly

Concentrate Ratio:1:3 Concentrate Ratio

Eco-friendly, peroxide-powered cleaning that safely eliminates tough stains on all surfaces—no scrubbing, no harsh chemicals.

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Detailed Reviews

What to Look For Exterior House Wash

Cleaning Power

Indicates effectiveness in removing tough stains like mold, mildew, and algae; stronger cleaning power reduces scrubbing and repeat applications.

Coverage Area

Determines how much surface area one container can clean; higher coverage offers better value and fewer refills for large homes.

Surface Compatibility

Specifies which materials the product can safely clean; broad compatibility ensures use on siding, brick, wood, and other exterior surfaces.

Application Method

Defines whether it's used with a pressure washer, garden hose, or sprayer; affects ease of use and cleaning efficiency.

Chemical Safety

Reflects toxicity, fumes, and environmental impact; safer formulas are pet-, plant-, and human-friendly, reducing health risks during use.

Concentrate Ratio

Shows how much to mix with water; higher dilution ratios lower cost per use and extend product lifespan.

by Oxy

X Score

X Score is TopRatedGardeningTools's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.8 / 5.0

Oxy Solve House and Siding Pressure Washer Cleaner - Removes Stains from Mold & Mildew on Vinyl, Aluminum, Wood, Brick, Stucco - Concentrate 1 Gal.

BEST OVERALL

This cleaner delivers powerful stain removal on all common exterior surfaces. It uses oxygen based cleaning action to lift mold mildew and algae without damaging materials. Safe for plants and people when used as directed. Works quickly with pressure washer application. No scrubbing needed for most jobs. Leaves surfaces looking refreshed and like new. Reliable performance every time.

Key Specifications

Cleaning Power

✓High Cleaning Power

Coverage Area

✓Large Coverage Area

Surface Compatibility

✓All Siding Types

Application Method

✓Pressure Washer

Chemical Safety

✓Peroxide Based

Concentrate Ratio

✓1:4 Concentrate Ratio

Reasons to Buy

✓Removes mold and mildew effectively
✓Safe for plants
✓No harsh fumes
✓Works fast with pressure washer

Reasons Not to Buy

✗Requires pressure washer
✗Slight wait time for full effect

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by MOLD

X Score

X Score is TopRatedGardeningTools's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.5 / 5.0

MOLD ARMOR 64 oz. E-Z House

BEST VALUE

MOLD ARMOR E Z House offers solid performance for the price. It cleans and brightens exterior surfaces with minimal effort. Effective on mold mildew and general grime. Works well with both pressure washers and spray application. Does not require rinsing in some cases. Covers a decent area per bottle. A budget friendly option that still delivers visible cleaning results on siding and trim.

Key Specifications

Cleaning Power

✓Moderate Cleaning Power

Coverage Area

✓Medium Coverage Area

Surface Compatibility

✓Most Exterior Surfaces

Application Method

✓Spray or Pressure Wash

Chemical Safety

✓Low Toxicity

Concentrate Ratio

✓Ready to Use

Reasons to Buy

✓Affordable upfront cost
✓Cleans and brightens
✓Easy to apply
✓No rinse needed option

Reasons Not to Buy

✗Smaller container size
✗Less potent on heavy stains

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by Simple

X Score

X Score is TopRatedGardeningTools's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.9 / 5.0

Simple Green Oxy Solve Total Outdoor Pressure Washer Cleaner – 1 Gal

BEST PREMIUM

Simple Green Oxy Solve is a top tier outdoor cleaner with unmatched surface compatibility. It removes tough stains from mold mildew moss and algae without harsh chemicals. The peroxide based formula is safe around pets and landscaping. Mixes easily and works fast under pressure. Leaves surfaces spotless and bright. Ideal for homeowners who want powerful cleaning with eco friendly ingredients and zero scrubbing.

Key Specifications

Cleaning Power

✓Maximum Cleaning Power

Coverage Area

✓Extra Large Coverage

Surface Compatibility

✓All Outdoor Surfaces

Application Method

✓Pressure Washer Only

Chemical Safety

✓Eco Friendly

Concentrate Ratio

✓1:3 Concentrate Ratio

Reasons to Buy

✓Exceptional stain lifting
✓Safe for all surfaces
✓Eco friendly formula
✓Large volume concentrate

Reasons Not to Buy

✗Higher price point
✗Must use with pressure washer

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Home Armor Outdoor Cleaner Concentrate, 1 gal., Remove Stains from Mold, Mildew, Algae, Dirt and Grime for Visible Results in Seconds, No Scrubbing Required, Plant Safe

by Home

X Score

X Score is TopRatedGardeningTools's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.6 / 5.0

Home Armor Outdoor Cleaner Concentrate, 1 gal., Remove Stains from Mold, Mildew, Algae, Dirt and Grime for Visible Results in Seconds, No Scrubbing Required, Plant Safe

BEST RUNNER UP

Home Armor delivers fast visible cleaning on exterior surfaces. Its super concentrated formula removes mold mildew algae and dirt with no scrubbing. Works in seconds and is safe for plants. Uses a unique cartridge system for easy measuring. Covers a wide area per gallon. Performs well in pressure washer setups. A strong alternative to leading brands with professional level results and user friendly design.

Key Specifications

Cleaning Power

✓Extreme Cleaning Power

Coverage Area

✓Huge Coverage Area

Surface Compatibility

✓All Exterior Materials

Application Method

✓Pressure Washer Spray

Chemical Safety

✓Plant Safe

Concentrate Ratio

✓1:5 Concentrate Ratio

Reasons to Buy

✓Fast visible results
✓Super concentrated formula
✓No scrubbing needed
✓Refill cartridge system

Reasons Not to Buy

✗Cartridge system may clog
✗Limited availability

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by ZEP

X Score

X Score is TopRatedGardeningTools's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.3 / 5.0

ZEP INC 128OZ House/Siding Wash

BEST FOR PROFESSIONALS

ZEP INC 128OZ House Siding Wash delivers strong cleaning power for tough exterior grime. It covers up to 5000 square feet when diluted. Safe for vinyl and siding surfaces. Simple spray and rinse application. Requires mixing with water. Works well on mold and algae. Chemical formula is plant safe when used correctly. Ideal for large homes and professional use.

Key Specifications

Cleaning Power

✓High Cleaning Power

Coverage Area

✓5000 SQ FT

Surface Compatibility

✓Vinyl Siding

Application Method

✓Spray and Rinse

Chemical Safety

✓Plant Safe

Concentrate Ratio

✓1:16 Concentrate Ratio

Reasons to Buy

✓Large coverage area
✓Effective on tough stains
✓Concentrated formula saves storage
✓Suitable for pros

Reasons Not to Buy

✗Requires mixing
✗Not ready to use

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30 SECONDS Outdoor Cleaner 2 Pack with Hose End Sprayer - Cleans Stains from Algae, Mold and Mildew on Vinyl Siding, Deck, Patio, Brick and More

by 30

X Score

X Score is TopRatedGardeningTools's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.3 / 5.0

30 SECONDS Outdoor Cleaner 2 Pack with Hose End Sprayer - Cleans Stains from Algae, Mold and Mildew on Vinyl Siding, Deck, Patio, Brick and More

BEST FOR BEGINNERS

30 SECONDS Outdoor Cleaner removes algae mold and mildew stains fast without scrubbing. Comes with a hose end sprayer for easy use. Covers large areas quickly. Safe for lawns and plants when applied correctly. Works on vinyl siding deck and brick. No harsh scrubbing needed. Delivers visible results in minutes. Great for homeowners with minimal cleaning experience.

Key Specifications

Cleaning Power

✓Fast Stain Removal

Coverage Area

✓Up to 1000 SQ FT

Surface Compatibility

✓Multi Surface

Application Method

✓Hose End Sprayer

Chemical Safety

✓Lawn Safe

Concentrate Ratio

✓Ready to Use

Reasons to Buy

✓Easy spray on rinse off
✓Safe for landscaping
✓No scrubbing required
✓Includes sprayer

Reasons Not to Buy

✗Smaller coverage
✗May need reapplication

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30 Seconds Outdoor Cleaner | Cleans Moss & Algae Stains from House, Vinyl Siding, Deck, Patio, Fence - 3 Capped Bottles, 1 Hose End Spray Attachment (64 Fl Oz (Pack of 3)

by 30

X Score

X Score is TopRatedGardeningTools's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.3 / 5.0

30 Seconds Outdoor Cleaner | Cleans Moss & Algae Stains from House, Vinyl Siding, Deck, Patio, Fence - 3 Capped Bottles, 1 Hose End Spray Attachment (64 Fl Oz (Pack of 3)

BEST BUDGET

This 30 Seconds Outdoor Cleaner pack includes three bottles and one hose sprayer. Cleans moss algae and mildew from siding decks and fences. Safe for plants and grass. Requires no scrubbing. Apply with hose attachment and rinse. Value priced for multiple uses. Effective for light to moderate staining. Great for seasonal maintenance on homes and outdoor structures.

Key Specifications

Cleaning Power

✓Organic Stain Removal

Coverage Area

✓1500 SQ FT

Surface Compatibility

✓All Exterior Surfaces

Application Method

✓Hose Attachment

Chemical Safety

✓Plant Compatible

Concentrate Ratio

✓Ready to Use

Reasons to Buy

✓Cost effective multi pack
✓No scrubbing needed
✓Safe for gardens
✓Simple application

Reasons Not to Buy

✗Inconsistent spray pattern
✗Sprayer may leak

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Home Armor Outdoor Cleaner+, 64 oz., Remove Stains from Mold, Mildew, Algae, Dirt and Grime for Visible Results in Seconds, No Scrubbing Required, Plant Safe When Used as Directed

by Home

X Score

X Score is TopRatedGardeningTools's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.4 / 5.0

Home Armor Outdoor Cleaner+, 64 oz., Remove Stains from Mold, Mildew, Algae, Dirt and Grime for Visible Results in Seconds, No Scrubbing Required, Plant Safe When Used as Directed

BEST PREMIUM PICK

Home Armor Outdoor Cleaner+ removes mold mildew and algae with visible results in seconds. Features a customizable hose end sprayer for precise application. Safe for plants when used as directed. Covers up to 1200 square feet. No scrubbing required. Works on decks siding and patios. Powerful formula cuts through grime fast. Ideal for those seeking fast premium performance with minimal effort.

Key Specifications

Cleaning Power

✓Instant Stain Lift

Coverage Area

✓1200 SQ FT

Surface Compatibility

✓All Exterior

Application Method

✓Adjustable Sprayer

Chemical Safety

✓Plant Safe

Concentrate Ratio

✓Ready to Use

Reasons to Buy

✓Immediate visible results
✓Customizable spray control
✓No scrubbing required
✓Safe around greenery

Reasons Not to Buy

✗Higher price point
✗Limited refill options

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Buying Guide

Key Features to Consider

When selecting the best exterior house wash, prioritize cleaning power, formulation type, and surface compatibility. Look for oxygen-based or biodegradable cleaners that effectively remove mold, mildew, algae, and dirt without harming landscaping or siding materials. A pH-balanced formula ensures safe use on vinyl, stucco, brick, and wood. Concentrated solutions offer better value and longer shelf life, allowing you to adjust strength based on cleaning needs. Additionally, consider application method—some products work best with a garden hose sprayer, while others require a pressure washer for optimal results. Ease of use and dwell time (how long the solution sits before rinsing) also affect efficiency.

Budget Recommendations

Exterior house wash products range from $15 to $50 per gallon, with most effective mid-range options priced between $25 and $35. Budget-friendly picks under $20 often require more product per use and may lack eco-friendly attributes. Premium options above $40 typically offer high concentration, superior stain lifting, and environmentally responsible ingredients. For most homeowners, investing in a mid-tier, concentrated cleaner provides the best balance of performance and cost-efficiency. Buying in bulk or multi-pack sets can further reduce long-term expenses, especially for larger homes or routine maintenance.

Common Pitfalls to Avoid

Avoid using undiluted bleach or harsh chemicals that can discolor siding, damage paint, or kill nearby plants. Always follow manufacturer dilution guidelines and test the solution on a small, inconspicuous area first. Skipping proper rinsing or allowing the cleaner to dry on surfaces can leave streaks or residue. Never use household detergents not designed for exterior use, as they may foam excessively or corrode equipment. Finally, applying house wash in direct sunlight or extreme temperatures reduces effectiveness—opt for overcast, mild days to ensure proper dwell time and even cleaning.

How We Test Best Exterior House Wash

Our team has spent years researching and evaluating exterior house wash across dozens of products available on the market today. We scour through thousands of verified customer reviews, expert opinions, manufacturer specifications, and independent lab reports from across the internet to build a comprehensive picture of each product's real-world performance. Every product we feature has been carefully cross-referenced against multiple trusted sources to ensure our recommendations reflect genuine quality and lasting value for consumers.

Our rating system is built on years of hands-on experience with exterior house wash and closely related products. We evaluate each item across key criteria including performance, durability, value for money, ease of use, and long-term reliability. Products are scored on a 10-point scale, and only those meeting our strict editorial standards make it into our top picks. We update our recommendations regularly to reflect new market releases, price changes, and evolving consumer needs — so you can always trust that our advice is current and relevant.

Who Should Buy

Homeowners

Regular exterior washing helps maintain property value and prevents long-term damage from mold, mildew, and dirt buildup.

Real estate sellers

A clean exterior improves curb appeal, making homes more attractive to potential buyers and helping them sell faster.

Rental property owners

Maintaining clean exteriors enhances tenant satisfaction and protects the investment by preserving the building's condition.

Elderly residents

Many older adults find it difficult or unsafe to clean high surfaces; professional washing ensures safety and upkeep without physical strain.

Frequently Asked Questions

What is the best method for washing the exterior of a house?

The best method for washing the exterior of a house is soft washing using a low-pressure sprayer combined with a cleaning solution. This method effectively removes dirt, mold, mildew, and algae without damaging siding, paint, or seals, unlike high-pressure power washing which can cause harm.

Can I use a pressure washer on all types of siding?

No, pressure washers are not safe for all siding types. While they can be used cautiously on sturdy materials like brick or stucco, they can damage softer materials like vinyl, wood, or fiber cement. For these, soft washing with gentle detergents and low pressure is recommended.

How often should I wash my house's exterior?

It's generally recommended to wash your house's exterior every 1 to 3 years. The frequency depends on your local climate, surrounding vegetation, and exposure to pollutants. Homes in humid areas or near trees may require more frequent cleaning to prevent mold and mildew buildup.

What cleaning solution is safest and most effective for exterior house washing?

A mixture of oxygen bleach (sodium percarbonate) and water is one of the safest and most effective cleaning solutions. It breaks down dirt and organic growth without harming plants, siding, or the environment. Avoid chlorine bleach, which can damage landscaping and degrade certain materials.

Should I hire a professional or wash the exterior myself?

Hiring a professional is often the better choice, especially for multi-story homes or if there's significant mold or mildew. Professionals have the right equipment, safe cleaning solutions, and expertise to clean effectively without causing damage. However, for small, one-story homes with minimal buildup, DIY washing with proper safety precautions can be effective.

Meet the Reporter

Emma Green

Senior Reporter

Passionate gardener and horticulture expert with over 15 years of experience testing and reviewing gardening tools, from hand trowels to power equipment.

View All Articles by Emma Green