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Freshly washed two-story home

Soft wash only

Roof cleaning in Denton, TX

Removing the black streaking from asphalt shingle, tile and metal roofing at low pressure, then flushing what comes down out of the gutters. The old pecans and elms around the Square drop steadily onto roofs that already sit in shade for most of the day.

Denton CountyFree estimatesPrice in writing

What roof cleaning in Denton covers

Those black streaks running down a roof are Gloeocapsa magma, an algae that feeds on the limestone filler in modern shingles. It starts on the slope that gets least sun and works its way down. It is not dirt, it does not wash off with rain, and it spreads.

Asphalt shingle

The streaking comes off without touching the granules, because nothing on the roof is under pressure at any point.

Three-tab · Architectural · Composite

Concrete and clay tile

Tile is cleaned and walked in the way tile has to be walked. Broken tile from careless footing costs more than the wash did.

Concrete tile · Clay tile

Metal roofing and patio covers

Standing seam, metal patio covers and porch roofs, cleaned without scouring the finish.

Standing seam · Patio covers

Gutters flushed afterwards

Whatever comes off the roof ends up in the trough. Leaving it there is how a clean roof turns into a blocked downspout a month later.

Trough · Downspouts

Plants and landscaping protected

Beds and grass at the drip line are wet down before and rinsed after, every time.

Beds · Turf

Every property is quoted after a walkthrough, so the price is for your property rather than an average of everyone else. Get a free quote

Method

A safer, better clean in three steps

No pressure goes on the roof. A cleaning solution is applied at low volume, given time to work, and rinsed. That is not a preference. The asphalt shingle industry specifies low-pressure cleaning, and pressure washing a shingle roof strips the granules the shingle depends on and can void the warranty. Plants and grass at the drip line are wet down before and after, and the gutters get flushed once the roof is done.

  1. 01

    The right cleaner for the surface

    We match the solution to what we are cleaning, so dirt and algae release on their own. No blasting away at full power.

  2. 02

    Low pressure, carefully applied

    Safe for paint, siding, brick, stone, stucco, windows, signage and landscaping, on homes and commercial buildings alike.

  3. 03

    A full rinse, then your approval

    We rinse everything down and walk the property with you. We pack up when you are satisfied, not before.

Before & after

Recent residential work

Drag the divider on any photo. Same spot, same day, one visit, nothing staged.

Stone gable and window, soiled on the left and cleaned on the right
BeforeAfter
Stone gable and window
Window glass, filmed over on the left and cleaned on the right
BeforeAfter
Window glass
Stone wall corner, dark staining on the left and cleaned on the right
BeforeAfter
Stone wall corner

Why Gem Pro

Why Denton property owners call us

Results you can see from the street

Commercial grade equipment and the right cleaner for each surface. Most properties have never been this clean.

Locally owned and commercially insured

A Texas business, not an out of state contractor. Your property gets the care we would give our own.

The price we quote is the price you pay

No surprise charges. If something else needs attention we will tell you, and the decision stays yours.

Common questions

Roof cleaning in Denton, answered

Gem Pro's wash trailer, carrying a water tank, hose reels and pump, hitched to the crew truck at a commercial property.

Do you cover Denton?

Yes. Denton is one of the eleven Dallas-Fort Worth cities Gem Pro covers, and we work throughout Denton County. That includes the Historic Square, Robson Ranch, the Rayzor Ranch area and the UNT and TWU neighbourhoods.

We are in Northlake, Flower Mound, Coppell and Grapevine regularly too, so a Denton job rarely waits. Call (214) 471-6720 or send the details and you get a price back the same business day.

Will roof cleaning damage my shingles?

Not the way we do it. Damage comes from pressure, which strips the mineral granules off the shingle surface and shortens the life of the roof. We use no pressure on a roof at all. The solution does the work and the rinse is gentle.

If someone quotes you a pressure wash for a shingle roof, that is the answer to walk away from.

Will the black streaks come back?

Eventually, yes, because the conditions that caused them are still there: shade, humidity and a north-facing slope. How fast depends on how much tree cover you have. Under heavy canopy expect it sooner than on an open lot.

Is it safe for the plants under the roof line?

Yes, with the preparation. Beds and grass around the drip line get wet down before we start and rinsed again after, which dilutes anything that reaches them. This is standard on every roof we do, not an extra.

Do you have to walk on my roof?

As little as possible, and on tile as close to never as the layout allows. Most of the work is done from ladders and from the ground with the right reach. Where we do have to be on the roof, that is part of what we talk through on the walkthrough first.

What does roof cleaning cost in Denton?

There is no honest flat rate, because no two properties are the same size, the same age or in the same condition. What we can promise is how the number is arrived at: we walk the property, we put the price in writing, and that is the price you pay.

Estimates are free and there is no charge for the walkthrough. If we spot something else worth attention we will tell you, and the decision stays yours.

Free estimates · Same business day

Get a price for your Denton property.

Tell us about the property and we reply the same business day with a price in writing. No surprise charges. We walk it with you before we start, and again before we leave.