Tile Roof Cleaning in Sarasota, FL

A tile roof is not a waterproof surface. That surprises most homeowners. The tile is a shell that sheds the bulk of the water and shades the layer underneath. The underlayment beneath the tile is what actually keeps water out of your house. Everything about how a tile roof should be cleaned follows from that one fact.

Sarasota Paver Sealing Pros cleans barrel tile, flat tile and clay tile roofs across Sarasota, Bradenton, Venice and Lakewood Ranch. We soft wash. We do not put a pressure wand on your tile, and we do not walk your roof more than the job requires. This page is specific to tile, because tile has failure modes that shingle does not.

Why is high pressure worse on tile than on other surfaces?

Two separate problems. The first is the tile itself. Concrete barrel tile is strong in compression, sitting in place bearing weight, and weak against sharp point loads and impact. A concentrated pressure stream at close range chips the glazed or coated face and can crack the barrel outright. Older tile that has weathered for twenty years is more fragile than it looks.

The second problem is the one nobody sees. Tile is installed with gaps and overlaps that shed water downhill. A pressure stream aimed uphill or sideways forces water into those gaps and onto the underlayment. Underlayment is designed to handle incidental moisture, not water driven at it under force. That is how a roof cleaning becomes a leak call three weeks later.

There is no version of high pressure that is safe on a tile roof. The tradeoff is not speed against risk. Soft wash does the job properly, so there is nothing to trade.

How is a tile roof soft washed step by step?

We start on the ground. Landscaping around the house is pre-wet and kept wet. Pool, lanai screens, patio furniture and anything else on the drip line gets protected. Valleys and gutters are cleared of palm litter and leaf debris so the solution reaches the tile instead of soaking into a pile of mulch on the roof.

Then the solution goes on at low pressure. It is sodium hypochlorite based, mixed to a strength suited to the tile and the severity of the growth, with a surfactant added so it clings to a sloped surface and penetrates the algae's protective sheath instead of running off the barrel and into the gutter.

Dwell time is where the job is won or lost. The solution has to stay wet on the tile long enough to kill the organism at the root. A roof looks better long before the algae is actually dead, and rinsing at that point gives you a great photo and regrowth within a few months. After full dwell, we rinse at low pressure, flush the gutters and downspouts, and rinse the landscaping again.

Is walking on my tile roof going to break it?

It can, if it is done carelessly. Barrel tile is walked at the lower third of the tile where it is supported by the tile below it, and along the headlaps. Stepping mid span on an unsupported barrel is how tile cracks under a boot. Flat tile is more forgiving but not immune.

This is a genuine reason to limit time on the roof, and it is another argument for soft wash. A soft wash uses reach and low pressure application rather than a person dragging a wand across every square foot of the field. Less traffic on the tile means fewer opportunities to break something.

If we do find cracked or slipped tile while we are up there, we tell you. Broken tile is not always visible from the ground and it is worth knowing about, particularly before anyone considers sealing.

What is the difference between concrete tile and clay tile for cleaning?

Concrete tile is the more common of the two on Sarasota homes and it is considerably more porous. That porosity holds moisture, and held moisture is what algae and lichen need. Concrete tile also carries a surface pigment or slurry coat that can be worn away by aggressive cleaning, which changes the color of the roof permanently.

Clay tile is denser and less absorbent, so it typically grows less and holds its color through its own body rather than a surface coat. It is, however, more brittle underfoot and less tolerant of impact. Older clay barrel in particular needs care.

Both get the same soft wash approach. What changes is solution strength, dwell and how the roof is accessed. A twenty year old concrete tile roof with a worn slurry coat gets treated differently than dense clay tile in good condition.

Why do the valleys and north slopes always look worst?

Because they stay wet longest. A north facing slope in Sarasota gets the least direct sun, so morning dew and overnight humidity sit on it hours longer than on the south face. Valleys collect both water and organic debris, and wet debris is a growth medium sitting directly on the tile.

Overhanging limbs make it worse in two ways at once. They drop material into the valleys and they block the sun that would dry the slope out. Live oaks and ficus are the usual culprits, and sabal palm litter is a persistent one in valleys.

Trimming limbs back from the roof is the single most effective thing a homeowner can do to slow regrowth. It costs nothing after the first trim and it works better than any product applied to the surface.

Should I seal my tile roof after cleaning it?

It is worth considering on concrete tile, because porosity is the whole problem. A sealer closes the surface, which means less water absorbed, less moisture held, and a longer interval before growth reestablishes. It also slows the UV fade that dulls tile color over the years.

The condition is that the roof must be clean and completely dry first. Sealing over live algae traps it permanently. Sealing over lichen residue leaves texture under the coating that you will see from the ground. In summer humidity, the drying step takes longer than people expect, so cleaning and sealing are usually two visits.

If your roof is near the end of its service life, we will say so rather than take the sealing job. Coating a roof with a few years left is not a good use of the money.

How do I know if a tile roof cleaning was done properly?

Look at the shaded slope three months later, not the sunny slope the same afternoon. Any method that removes the visible staining will look good on day one. The test is whether the growth stays gone through a wet season, which is what full dwell time buys you.

Check the gutters and downspouts for grit. Excessive granular material or chips of tile coating in the gutter after a cleaning is a sign that pressure was used. Walk the perimeter and look up at the barrel edges for fresh chipping.

And ask about lichen honestly. If your roof had lichen and someone promised it would all be gone the same day, that was not accurate. Lichen dies during the wash and then takes weeks of sun and rain to release. A contractor who explains that in advance is telling you how the material actually behaves.