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Asphalt shingle roof half covered in black algae and half cleaned

Roof soft washing in Austin, TX

Roof cleaning in Austin with soft washing

Dark streaks and moss come off shingles with low pressure and the right solution. Call (512) 555-0138 and tell us what your roof looks like.

  • No hard jet on your shingles
  • Black algae, moss and lichen treated
  • Written quote before work starts

Step 1 of 3

What needs cleaning?

What is roof soft washing?

Roof cleaning in Austin is soft washing. A cleaning solution is applied to the roof surface, it kills the algae, moss and lichen, and low-pressure water rinses it away. No hard jet touches the shingles.

That matters because the surface of an asphalt shingle is a layer of small mineral granules. They protect the shingle from sun and weather. High pressure can knock those granules loose, shorten the life of the roof and may affect the manufacturer warranty. Roofing manufacturers and trade groups generally advise against pressure washing shingles, and we agree. Soft washing treats the cause, which is living growth, without scarring the roof.

The same approach suits many tile, metal and flat roofs, though each needs its own care. Tell us what you have when you call.

What are the dark streaks on my Austin roof?

Most of the time, the black or gray streaks running down a roof are algae. The common type, often called black algae, is a blue-green growth that feeds on moisture and on the limestone filler used in many asphalt shingles. It appears first on the slope that gets the least sun, which for most Austin houses is the north side.

  • Black algae streaks. Dark vertical stripes, usually worse on shaded slopes and under live oaks.
  • Moss. Thick green clumps that hold water against the shingles, mostly in damp, shaded spots.
  • Lichen. Crusty gray or orange patches that grip the shingle and are harder to remove.
  • Debris. Oak leaves, cedar needles and pollen that pile up in valleys and behind chimneys.

Austin is drier than the Gulf Coast, but humid spells, heavy spring rains and shade from mature trees give algae what it needs. Dark streaks also absorb more heat, which does not help in an Austin summer.

Is it safe to clean a roof that has hail damage?

Central Texas gets hail, and a roof that has been hit can have bruised shingles, missing granules and cracked spots that are hard to see from the ground. Cleaning does not repair that damage and can make a weak roof look better than it is.

If a recent storm hit your area, have a roofer or inspector look at the roof first. Check with your insurance company about claim deadlines, because a cleaned roof may hide the evidence an adjuster looks for. Once the roof is confirmed sound, cleaning is a sensible next step. If you need repair or replacement first, a roofing company is the right call, and cleaning can follow afterward.

Tell us before the visit if you know of loose, curling or missing shingles, soft spots or old repairs. A roof that is wet, very steep or in poor shape may not be safe to walk, and we will say so rather than take a risk.

We quote in writing, and the price depends on the roof. The main factors:

  • Roof size and pitch. Steep, complex roofs take more time and care.
  • Stories and access. A two-story house needs more setup than a single-story one.
  • Material. Asphalt shingles, tile and metal each need their own method.
  • How much growth there is. Light streaks clean faster than thick moss or lichen.
  • Surroundings. Trees, flower beds, air conditioning units and pools all need protecting.

Most roofs take a half day or less, and bigger or more difficult roofs take longer. Most of the improvement shows right away. Some stubborn spots keep fading over the following weeks as rain rinses the treated growth away.

On the day, close your windows, move cars out of the driveway and keep pets inside. Plants are wetted before and rinsed after the work.

How often should a roof be cleaned, and when should I call?

There is no set schedule. A sunny roof in an open yard may stay clean for years, while a shaded roof under mature oaks may show streaks again sooner. Cleaning works best when growth is light, before moss lifts the edges of shingles or lichen takes hold.

Call when you see dark streaks, green patches or heavy debris in the valleys, or when you plan to list the home. Some HOAs send notices about stained roofs, so check your guidelines. Austin Water can restrict outdoor water use in drought stages, so check the current city rules as well. Algae-resistant shingles and metal strips along the ridge can slow regrowth, and a roofer can tell you whether they suit your home.

While you are planning, take a look at house washing for the walls below the roof and driveway cleaning for the slab. The main page lists every service.

Free written quotes
Local crews
Safe soft-wash methods
Fast scheduling

How it works

  1. Step 1

    Send photos or request a visit

    Tell us what needs cleaning.

  2. Step 2

    Get a written quote

    Clear price before any work starts.

  3. Step 3

    We clean and tidy up

    Rinse, check and leave the site clean.

Request roof washing

Tell us what you need and we call you back.

No obligation.

Step 1 of 3

What needs cleaning?

Questions about pressure washing in Austin

Why not just pressure wash my roof?

High pressure can strip the protective granules from asphalt shingles, force water under the edges and shorten the life of the roof. Many manufacturers and roofing groups advise against it. Soft washing uses a solution to kill the growth and low-pressure water to rinse, which treats the problem without the same risk.

Are black streaks on my roof harmful?

Early streaks are mostly a cosmetic problem, though they absorb more heat. Left for years, algae, moss and lichen can hold moisture against the shingles and wear them faster. Moss in particular can lift the edges of shingles. Cleaning while the growth is light is usually easier and gentler on the roof.

Will roof cleaning damage my plants?

The crew wets plants before the work, keeps runoff controlled and rinses again afterward. This dilutes the solution so plants are protected. If you have delicate beds, a vegetable garden or a pond close to the house, tell us when you book so we can plan the job around them.

How long do the results last?

It varies with shade, trees and humidity. A roof in full sun may stay clean for a long time, while a roof under live oaks may show growth again sooner. Algae-resistant shingles or metal strips can slow regrowth. We cannot promise a fixed period, but we can tell you what affects your roof.

Can you clean a tile or metal roof?

Yes, in many cases, though the method differs from asphalt shingles. Tile can be fragile underfoot, and metal can be slippery, so the approach is planned for the material. Tell us what the roof is made of and how steep it is when you call, and we will explain how we would handle it.

Ready when you are Call now or request a quote online. Call for a free quote Get my free washing quote (512) 555-0138

Get my free washing quote