Should you clean your roof before selling your home?

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Short answer: Yes, clean your roof before you list. Buyers and appraisers judge a house from the curb before they walk in, and black streaks on shingles read as an old, neglected roof even when the roof underneath has years left.

What a buyer actually sees first

Most buyers form an opinion in the driveway, before the front door opens. A roof striped with black algae looks tired next to a clean one, even on a house that's otherwise in great shape. It's one of the fastest, cheapest fixes on the pre-listing list, and unlike a kitchen update or a fresh coat of paint, it's usually done in a single visit.

The streaks aren't dirt. They're Gloeocapsa magma, an algae that feeds on the limestone filler in shingles and spreads on the wind. It thrives in Florida's heat, humidity and shade, which is why it shows up on so many roofs here, sometimes within a couple of years of a roof being brand new.

Appraisers and inspectors may notice too

A rough-looking roof can show up as a condition note on an inspection even when the shingles are structurally sound, and that note can become a talking point during negotiations. Ask your agent how a streaked roof tends to play with appraisers and inspectors in your specific market.

A clean roof also photographs better, and most buyers see the listing photos long before they see the house in person, which means the roof is making a first impression days or weeks before anyone drives over.

Soft washing, not pressure washing

A roof gets soft washed: a cleaning solution applied at low pressure, not a power washer aimed at the shingles. High pressure strips the granules that protect the roof and can shorten its life, which is the opposite of what you want right before a sale. The same care applies to any nearby plants, which get wet down before the wash and rinsed after.

What it won't fix, and what it will

A soft wash clears algae, moss and general grime from the surface. It won't repair missing or curling shingles, soft spots, or flashing issues, and it won't add years back to a roof that's genuinely near the end of its life. If your roof has those problems, a buyer's inspector will likely find them either way, streaked or not.

Timing it around your closing

Roofs hold their clean look for a while, so there's no need to wait until the week of your first showing, but doing it too far ahead wastes the effect if algae has time to creep back before closing. Aim for a few weeks before you list, or check with your agent on their preferred timeline for the local market.

In Volusia County

Volusia County property records show 77 percent of county roofs are shingle, the type most prone to algae streaking. Fifty-six percent of homes in the county were built before 1990 -- old enough that many original roofs are carrying years of algae buildup. A typical roof clean, priced from those records, runs 464 dollars.

Questions people ask

Will a clean roof raise my sale price?

There's no set dollar figure for it. What a clean roof reliably does is remove an easy objection and help the listing photos; talk to your agent about how that plays in your local market.

What if my roof is old and near the end of its life?

A soft wash cleans what's there; it won't add years back to worn shingles. If your inspector flags the roof's age or condition, that's a separate conversation from the streaking.

Can I just clean the front-facing slope?

You can, but buyers and inspectors walk the whole property, and a clean front with streaked sides looks unfinished rather than clean.

Does a metal or tile roof need the same treatment?

Any roof type can pick up streaking or algae in Florida's climate, so the same soft wash approach applies regardless of the material, just priced by the roof type and size.

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Roof cleaning across Volusia →