Roof & Soft Washing

Soft washing is exterior cleaning that uses low pressure and a cleaning solution instead of force. Diamond Exteriors soft washes roofs, vinyl siding, stucco, and painted surfaces on Cleveland-area homes and commercial buildings, removing the black streaks, green algae, and mildew that high pressure would spread or damage.

Those black streaks on the roof are alive

The dark streaks running down so many roofs around Cleveland are usually algae, not dirt. It feeds on the shingles, holds moisture, and spreads from the shaded side of the roof outward. Pressure washing shingles strips the protective granules; soft washing kills the growth and lets it rinse away.

Gentle on siding, thorough on growth

Vinyl siding overlaps, and high pressure aimed upward can drive water behind it. Soft washing applies the solution at low pressure, gives it time to work, and rinses it off gently. The same approach works on stucco, EIFS, and painted surfaces on both homes and commercial buildings.

We wet down and rinse plants and landscaping around the work area and keep solution away from spots where runoff could collect.

When soft washing is the better call

If the surface is soft, painted, layered, or roofing, it gets soft washed. If it is concrete, pavers, or bare masonry, it usually gets pressure washed. Most properties have both, which is why we often do both in one visit.

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Questions about roof & soft washing

What is the difference between soft washing and pressure washing?

Pressure washing uses high-pressure water to remove dirt from hard surfaces like concrete and brick. Soft washing uses low pressure and a cleaning solution to kill algae and mildew on softer materials such as roofs, vinyl siding, and stucco, without damaging them.

Is soft washing safe for asphalt shingle roofs?

Yes. Low-pressure soft washing is the approach generally recommended for asphalt shingles because it removes algae without blasting away the granules that protect the roof.

How long do soft washing results last?

It varies with shade, moisture, and nearby trees. Many exteriors stay clean for a year or more, while heavily shaded north-facing walls and roofs may show new growth sooner.

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