What Xterior Softwash Does and Whether It's Right for Your Home

Xterior Softwash is a cleaning method, not a pressure washer brand

Xterior Softwash is a low-pressure cleaning technique that uses specialized chemical solutions instead of high-pressure water to clean exterior surfaces. Unlike traditional pressure washing, which relies on force to strip away dirt and grime, softwashing applies biodegradable cleaning agents that break down stains, algae, mold, and mildew at the source. The solution sits on the surface for a period of time, then is rinsed away with low-pressure water—typically at 500 PSI or less, compared to the 3,000 PSI or higher that standard pressure washers use.

Xterior Softwash is a company that offers this service in South Carolina and other states, but the term "softwash" itself refers to the method rather than a single brand. Many pressure washing companies now offer softwashing as an alternative to traditional high-pressure cleaning, especially for delicate surfaces like roof shingles, siding, and painted wood.

Key Takeaways

• Softwashing uses chemical solutions and low pressure instead of high-pressure water, making it safer for delicate surfaces like roofs and older siding.
• The cleaning agents in softwash solutions kill algae, mold, and mildew at the root, so results last longer than pressure washing alone.
• Xterior Softwash is one company offering this service; many local pressure washing contractors in South Carolina also provide softwashing.
• Softwashing costs more upfront than pressure washing but may save money over time because surfaces stay cleaner longer.
• Results take longer to appear than pressure washing because the chemical solution needs time to work, not because force is being applied immediately.

When softwashing works better than pressure washing

Softwashing is the better choice for surfaces that can be damaged by high-pressure water. Roof shingles, cedar siding, stucco, and painted wood all benefit from the gentler approach. High-pressure water can strip protective coatings, force water into gaps where it causes rot, or dislodge shingles. Softwashing avoids these risks because the pressure is so low that it cannot force its way into seams or damage the surface itself.

Softwashing also works better for organic growth like algae and mold. Pressure washing removes the visible stain, but the spores remain in the surface and regrow within weeks or months. Softwashing solutions kill the organism at the root, so the surface stays clean for six months to a year or longer, depending on the product used and the climate. In South Carolina's humid environment, where mold and algae return quickly, this difference matters.

Roof cleaning is the most common softwashing job. Pressure washing a roof risks voiding the shingle warranty, creating leaks, and shortening the roof's life. Softwashing removes the dark stains and algae that make a roof look old without any of those risks.

How softwashing costs compare to pressure washing

Softwashing typically costs 20 to 40 percent more than pressure washing for the same square footage, because the process requires specialized equipment, trained technicians, and the cost of the chemical solutions themselves. A single-story home roof might cost $300 to $500 to softwash, whereas pressure washing the same roof might cost $200 to $300. House siding softwashing runs higher per square foot than roof cleaning.

The longer-lasting results can offset the higher upfront cost. If pressure washing requires a repeat job every 6 to 12 months and softwashing lasts 12 to 24 months, the softwashing approach may cost less over a three-year period. The math depends on your specific surfaces, your local climate, and how much organic growth returns to your property.

Get quotes from multiple contractors in your area—including Xterior Softwash if they serve your location, and also local pressure washing companies that offer softwashing. Ask each contractor what chemical solutions they use, how long results typically last in your area, and whether they offer any warranty on their work.

What to expect during and after a softwash job

A softwashing crew will arrive with a truck-mounted system or portable equipment that mixes and applies the cleaning solution. They spray the solution onto the surface and let it dwell—sit without rinsing—for 15 minutes to several hours, depending on the product and the job. During this time, the chemicals are working to kill algae, mold, and mildew. You may see the stains darken or change color as the solution works; this is normal.

After the dwell time, the crew rinses the surface with low-pressure water. The entire process is quieter and less aggressive than pressure washing. You should not see dirt and grime being blasted away in real time; instead, the surface gradually becomes cleaner as the solution does its work and is rinsed away.

Results may not be immediately visible. Some stains fade over the next few days as the solution continues to work and any remaining residue dries. This is different from pressure washing, where you see the result right away. Plan for the job to take longer than a pressure washing job would, and ask the contractor how long before you should expect to see the full result.

Finding softwashing services in South Carolina

Xterior Softwash operates in parts of South Carolina, but availability varies by region. Check their website or call to confirm they serve your area. If they do not, search for "softwashing near me" or "soft wash [your city]" to find local contractors who offer the service.

When comparing contractors, ask whether they are insured and bonded, how long they have been in business, and whether they have references from recent jobs on similar surfaces. Ask about the specific chemicals they use—some are more eco-friendly than others, and some work better on certain surfaces. If you have concerns about runoff or environmental impact, ask how they manage water and chemical disposal.

Read online reviews on Google, Yelp, or the Better Business Bureau, but remember that reviews reflect individual experiences and may not predict your own outcome. A contractor with mostly five-star reviews but only three total reviews is less reliable than one with 50 reviews averaging 4.5 stars.

Softwashing versus pressure washing for different surfaces

Roofs are the clearest case for softwashing. Pressure washing voids warranties and risks damage; softwashing does neither. Siding also benefits from softwashing, especially if it is wood, cedar, or older vinyl. Painted surfaces, decks, and fences can go either way—softwashing is safer, but pressure washing works if done carefully by someone experienced with the surface type.

Concrete and asphalt driveways are one area where pressure washing remains the standard choice. These hard surfaces can withstand high pressure, and the force is often the most efficient way to remove oil stains and built-up grime. Softwashing concrete is possible but usually unnecessary unless the concrete is sealed or you want to avoid the noise and disruption of pressure washing.

Gutters, downspouts, and window frames are too small and detailed for most softwashing equipment. These are typically cleaned by hand or with pressure washing at very low PSI. Ask your contractor what method they recommend for these areas.

Questions to ask before hiring a softwashing contractor

Ask whether the contractor's insurance covers softwashing work and whether they carry liability coverage. Ask what happens if the chemicals damage landscaping, cars, or outdoor furniture—who pays for repairs, and is there a may provide? Ask whether they will protect your plants and property before starting, and what you should do to prepare your yard.

Ask how long the results typically last in your climate and on your specific surfaces. Ask whether they offer a follow-up treatment or a discount if you book a second job within a certain timeframe. Ask whether the price includes all travel, equipment, and chemicals, or whether there are additional fees.

Ask for a written estimate that specifies the square footage being cleaned, the price per square foot or total price, the chemicals being used, and the timeline for completion and visible results.

Frequently Asked Questions

Will softwashing damage my roof shingles or siding?

No. Softwashing is designed specifically to clean delicate surfaces without damage. The low pressure cannot force water into seams or dislodge shingles, and the chemical solution does not degrade most roofing or siding materials. Pressure washing, by contrast, can void roof warranties and cause water intrusion.

How long do softwashing results last?

Results typically last 12 to 24 months on roofs and siding in South Carolina, depending on the chemical used, the surface type, and how much shade and moisture the area receives. Pressure washing results usually last 6 to 12 months because the spores of mold and algae remain and regrow.

Is softwashing safe for plants and pets?

Most softwashing solutions are biodegradable and low-toxicity, but you should ask the contractor what chemicals they use and whether they are safe around your specific plants and pets. A responsible contractor will cover sensitive areas before spraying and rinse plants afterward. Keep pets indoors during the job and for a few hours after if you are concerned.

Can I softwash my driveway?

You can, but it is usually not necessary. Concrete and asphalt driveways are durable enough for pressure washing, which removes oil stains and grime more quickly. Softwashing is an option if you want to avoid the noise and disruption, or if your driveway is sealed and you want to protect the sealant.

How do I know if a contractor is using quality chemicals?

Ask the contractor the brand name and type of chemical they use, and ask whether it is biodegradable and EPA-approved for exterior cleaning. Ask how long they have used that product and whether they have seen good results. A contractor who can answer these questions confidently and provide references is likely using a quality product.