Heavy mildew and salt build up on a painted exterior surface before soft washing, Brunswick GA

Siding Safety

Is Soft Washing Safe for Hardie, Stucco, Vinyl and Tabby?

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Homes in Brunswick, St. Simons Island and the Golden Isles are sided in more different materials than most towns this size, from modern Hardie board to century-old tabby, and the honest short answer is yes — soft washing is safe on all four of these, and it is generally the safer choice compared to pressure washing on every one of them. Here is why, material by material.

Hardie board (fiber cement)

Hardie is about as tough as siding gets. The factory finish on it is still a coating, though, and hit it hard enough times with a pressure washer and that coating chips or wears thin. Soft washing lifts the mildew and algae that grow in Hardie's textured surface without touching the finish, using a cleaning solution at low pressure rather than force. It is the manufacturer-safe way to clean it and the method we use on every Hardie home we wash.

Stucco

Stucco is more porous than it looks, and pressure driven directly at it can force water behind the surface, crack the finish coat, or wash out the texture entirely. Soft washing is the right call here specifically because there is no force pushing water into the wall — the solution does the cleaning, and the rinse is gentle. Stucco homes, common on the newer builds around Brunswick and the islands, are one of the materials where the difference between the two methods matters most.

Vinyl siding

People figure vinyl is tough because it's plastic. The weak spot is the seams: every panel locks into the next one, and high pressure aimed at those joints pushes water in behind the siding. It sits there against the sheathing, and years later it turns up as rot or mold you can't see from outside. Soft washing gets vinyl clean without any of that. It's easier on the color too. Keep pressure washing vinyl year after year and it can fade or streak.

Tabby

Tabby — the oyster shell, lime, sand and water building material used across coastal Georgia since the colonial period — is a genuinely fragile, historic material where pressure washing can be close to irreversible. Because tabby is essentially a soft, aggregate concrete full of embedded shell, high pressure erodes the surface and can expose or dislodge the shell itself, which cannot be put back. Soft washing is the only responsible method on a tabby wall, whether it is a modern tabby-style home in Old Town Brunswick or an older structure. If your home has any true tabby construction, this is the one material where we would tell you outright that pressure washing is not an option we would ever recommend.

Painted wood, the fifth material worth mentioning

You still see a lot of painted wood siding on the older Brunswick homes. Think of it as Hardie, only touchier. Pressure can lift or peel the paint, and once the paint goes, the wood under it is open to moisture. Soft washing takes the mildew off and leaves the paint alone.

What actually damages siding, if not soft washing

The two things that genuinely damage siding are high pressure applied directly to a coated or seamed surface, and leaving a solution on too long or at the wrong strength for the material. Soft washing avoids the first entirely by design, and the second is a matter of doing the job correctly — matching the solution and dwell time to the specific siding, which is why we treat vinyl, Hardie, stucco and tabby differently even in the same visit. Landscaping and plants along the wall are wetted down before we start and rinsed again after, for the same reason. Read how soft washing works and what it removes for the full process.

What if my home is a mix of materials?

Many homes here have more than one siding type — stucco on the main house with a tabby-style accent wall, or Hardie trim over vinyl body — and we simply treat each surface according to its own material during the same visit rather than using one blanket approach on the whole exterior.

Frequently Asked Questions

Will soft washing fade or discolor my siding?

No. The cleaning solution lifts mildew, algae and salt film without bleaching or stripping color; it is pressure and repeated aggressive scrubbing that fade and wear a finish over time, not soft washing.

Is tabby too fragile to clean at all?

No, but it should only ever be cleaned at low pressure. Tabby is soft enough that pressure washing can erode the surface and expose the embedded oyster shell, which cannot be repaired the way a repainted wall can.

Can soft washing get water behind my vinyl siding?

No. The low pressure rinse used in soft washing does not have the force to drive water behind seams the way a pressure washer aimed directly at the panels can.

Does stucco need a different cleaning solution than vinyl or Hardie?

Yes, generally a gentler mix and shorter dwell time, because stucco is more porous. We adjust the solution to the material on every job rather than using one mix on the whole house.

Get your siding looked at

(912) 571-0639

If you are not sure what your home is sided in, or you are worried a particular wall is too fragile to clean, call or text (912) 571-0639. We will identify the material and tell you honestly what it needs, at no charge for the visit. The same low pressure standard applies to wood decks and fences and to our roof cleaning, so nothing on the property gets treated with more force than it can safely take.

Call (912) 571-0639 for a Free Quote

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