Roof Maxx Reviews: Does Roof Rejuvenation Work, and Should You Spray or Replace? (2026)

What a Roof Rejuvenation Spray Is and How It Is Supposed to Work

An asphalt shingle is a fiberglass mat soaked in asphalt and topped with stone granules. The asphalt stays flexible because of the light oils in it. Sun and heat drive those oils off over the years. InterNACHI, the home inspectors' association, puts it this way: "Shingles become more brittle as volatiles, which keep them flexible, dissipate." The same page says losing those volatiles weakens the bond that holds the granules on.

A brittle shingle cracks when it flexes in the cold, snaps when wind lifts it, and sheds granules faster. Once the granules go, sunlight hits bare asphalt and the aging speeds up. Our guide to roof granule loss shows what normal shedding looks like and what does not.

A rejuvenation spray tries to put oil back. Roof Maxx is the best-known brand. The company says it "uses a plant-derived oil made from recently commercialized Soy Methyl Ester Emulsion (SMEE) technology." In plain terms:

• It is a soybean-oil product carried in water. The Ohio State report lists the emulsion at about 10 percent active ingredient.
• A dealer sprays it on the roof. The same report says it soaks in within 30 minutes to an hour.
• Roof Maxx says it is not a coating. It is meant to soak into the asphalt, not sit on top as a film.
• Dealers offer a "tune-up" first: loose shingles, flashing sealant and exposed nails get handled before the spray.
• You cannot buy it off a shelf. The company says a treatment must be done by one of its approved contractors.

Other soy-based sprays are on the market too. Most of the search traffic, and most of the published testing, is about Roof Maxx. So that is the brand this guide looks at hardest.

What Roof Maxx Claims, in Its Own Words

These are the company's statements as they appeared on roofmaxx.com on September 20, 2026. They are claims, not our findings.

• Years added. Roof Maxx says a treatment will "strengthen and extend the life of your roof by five years per treatment." It adds: "With repeated treatments every five years, you can extend the life of your roof up to 15 years."
• Savings. It advertises "a savings up to 80% over replacement."
• Which shingles. Its pricing page says the product "adds up to 15 years to the lifespan of asphalt shingles that are unbroken and in good condition." Note the last five words.
• Which roofs it turns away. "If 30% or more of the protective granules are gone, the shingles are too far along for treatment, and replacement is suggested." And: "If your roof has had repeated issues, it may point to poor installation. In this case, replacement is often the best option."
• Scale. The site counts more than 100,000 homes completed and says the company has been treating roofs since 2017.
• Warranty. A five-year, transferable "flexibility" warranty. The terms are further down this page, and they are narrower than the headline.

To the company's credit, its own site draws the same line we draw below. The product is for shingles that are intact. It is not for roofs that are already coming apart.

What the Testing Shows and What It Does Not

The science page on roofmaxx.com leans on one body of work: a technical report from The Ohio State University built on December 2017 lab tests by PRI Construction Materials Technologies. The copy we read is hosted by a Roof Maxx dealer. Here is what it measured.

Those are real improvements, measured by an accredited lab. They also come with limits that the marketing leaves out:

• One roof. The report says the "three-tab asphalt shingles were obtained from a 17 years-old roof in central Ohio." One roof, one shingle type. Most roofs we see in Essex County now carry thicker architectural shingles.
• Three days, not five years. Treated samples were "left to air dry for 3 days at room temperature" and then shipped to the lab. The tests show what the shingle is like right after treatment. They do not show what it is like after five New Jersey winters.
• Who paid. The report says it "was prepared at the request of Roof Maxx Technologies and the Ohio Soybean Council," with soybean council grant money. The lab's client was the soybean council.
• Not an endorsement. The report itself states: "Discussion of a specific product or company does not constitute endorsement by The Ohio State University."

Is There Any Independent Evidence?

We looked for work the company did not commission. We found three things.

1. The manufacturers' association says the record is thin. The Asphalt Roofing Manufacturers Association technical bulletin, posted on its site in July 2026, says: "ARMA strongly advises against the field application of any type of coatings or rejuvenators over installed asphalt shingles." It adds that there is "limited available documentation" on whether these products deliver longer roof life. Keep in mind ARMA members sell new shingles. Their caution is still worth reading.
2. One peer-reviewed paper, with a disclosed stake. In August 2025 an Iowa State University team published tests of soybean-oil emulsions on new and 15-plus-year-old shingles. A generic 10 percent soy methyl ester emulsion was their control. The paper names no brand. It reports that all treatments improved granule retention, and that the team's own formula "significantly outperformed SME treatment in all other respects." Six of the ten authors disclose owning shares in a company called SoyLei Innovations. So it is peer reviewed, but it is not neutral either.
3. An older warning about coatings. In 2010 a technical director at the National Roofing Contractors Association wrote that he found no independent test reports behind the claims made for shingle coatings. That article predates soy sprays and was about film-forming coatings. Treat it as background.

What we did not find is the study that would settle it: treated and untreated roofs on real houses, tracked for five years or more, by someone with no money in the outcome. If that study exists, it is not public. That gap is the honest answer to "does Roof Maxx work." It does something measurable in a lab. How many years that buys on your house is not proven.

Is Your Roof a Candidate or Past It? The Condition Table

This table is ours. It comes from walking asphalt roofs in Essex County, checked against the limits Roof Maxx publishes for itself. Read across each row. One or two marks in the right-hand column on a small area can be a repair. Several marks there mean the roof is done, and no spray changes that.

Most of these checks cannot be made from the driveway. Brittle tabs, failed seal strips and soft decking are found by hand and from the attic. That is the job of a roof inspection, and it should happen before anyone quotes you a spray or a new roof.

What It Costs, by the Company's Numbers

Roof Maxx does not publish a price list. Its pricing page says "Prices per square foot vary depending on local dealers" and then gives one example: "A roof that would cost $20,000-$30,000 to replace might only cost $3,000-$6,000 to treat with Roof Maxx." The page describes that as an average regional price for a home of about 2,000 square feet.

Every figure in that paragraph is the company's. None is an R&E Roofing price, and the replacement range is theirs too. The same page lists what can raise the bill:

• Roof height, steepness, size and complexity
• Replacing plumbing boots
• Sealing nail pops
• Caulking around flashing
• Cleaning shingles or gutters

You will see other numbers online, many quoted per square foot. They disagree with each other widely, and most come from companies that sell a spray. We did not find a neutral price survey, so we are not repeating them.

The Math Worth Doing

This is our arithmetic on the company's own example. It is not a quote.

• $3,000 to $6,000 for a five-year warranty period works out to $600 to $1,200 per year.
• Three treatments over 15 years would total $9,000 to $18,000, if each one costs about the same. The company does not say what repeat treatments cost.
• At the end of those 15 years you still own the old roof, with its old underlayment and old flashing. Then you buy the replacement anyway.

That does not make a treatment a bad buy. Pushing a large bill out five years has real value to a lot of households. It does mean "80% savings" compares one treatment to a whole new roof. Those are not the same purchase. Before you sign, get three things from the dealer in writing:

1. The spray price and the tune-up repairs as separate lines.
2. Photos of the roof areas the dealer checked to qualify it.
3. The full warranty text, not the brochure line.

How Long It Lasts and What the Warranty Covers

The claim is five years per treatment, repeatable twice, for up to 15 years. We found no public field data behind the five-year number. What stands behind it is the company's Flexibility Warranty, last updated October 24, 2025. Read it closely, because it is narrower than "your roof is covered for five years."

• What it promises. That "the treated asphalt shingles will remain flexible and in a serviceable condition for a period of five (5) years from the date of treatment."
• The remedy. If shingles fail the company's flexibility test, the dealer will "retreat the affected area(s) on a prorated basis over the 60-month warranty period." That is another spray at a prorated price. It is not a refund and it is not a roof.
• What it excludes. "This is not a warranty against loss of the granule coating, leaks, or faulty installation of the existing roof." Wind, ice, snow and hail are pointed to your homeowners policy.
• Transfer. It passes to the next owner, and it stays valid even if the shingle maker's warranty has run out.

So the warranty backs the one thing the lab tests measured: flexibility. It does not back the thing a homeowner actually cares about, which is a dry house. For how long asphalt roofs really run in this climate, see how long roofs last in NJ.

Complaints and the BBB Record

We read the Better Business Bureau profile for Roof Maxx Technologies LLC, Westerville, Ohio, on September 20, 2026. It showed:

• An A+ rating
• BBB accreditation since May 16, 2025
• 5 complaints in the last three years, 3 of them closed in the last 12 months
• Complaint types: product issues (2), billing issues (1), order issues (1), service or repair issues (1)

For a company that counts more than 100,000 homes, five complaints is a small number. Two cautions go with it. BBB numbers change, so check the date on anything you read, including this page. And that profile is the corporate office. Your roof would be sprayed by a locally owned dealer, which is a separate business with its own record. Look the dealer up under its own name.

Forums and review sites carry stronger opinions in both directions. We have not repeated any of them here, because we cannot verify who wrote them or what shape the roof was in. Our own view is that the outcome depends mostly on which roofs get treated. A spray on a roof that was already near the end was never going to end well, whatever the product.

Is There a Roof Maxx Lawsuit?

People search this a few hundred times a month, so here is exactly what we could and could not verify as of September 2026.

• No consumer case we could verify. We found no class action, no state or federal regulator action, and no homeowner product case against Roof Maxx in any court record we could open.
• A dealer dispute in federal court. Case 2:20-cv-03151 in the U.S. District Court for the Southern District of Ohio, with Roof Maxx as the plaintiff, is a contract fight between the company and a former dealer. The dealer filed claims back. The ruling we read, an August 16, 2021 order, granted part and denied part of a motion to dismiss. That is an early procedural step. It decided nothing about whether the product works, and we did not find the final outcome.
• A case the company brought and says it won. Roof Maxx sued a competing rejuvenation company in Delaware County, Ohio, over statements made about its product. A November 7, 2022 press release from the company reports a judgment in its favor of about $8 million. Our source for that is the company's own announcement. We did not open the county docket.
• Pages with no case number. At least one site that ranks for "Roof Maxx lawsuit" says class action filings are underway in several places. It names no court and no case number. We could not match that to any record.

If a real consumer case is filed later, it will carry a court name and a docket number. Ask for those before you believe a headline.

What a Spray Does to Your Shingle Warranty

There are three positions on the record, and they do not agree.

• Roof Maxx: the company says it has treated over 100 million square feet and has never "heard of a manufacturer's warranty claim being denied because Roof Maxx was applied."
• ARMA: "many asphalt shingle manufacturers specifically recommend against applying a rejuvenator material on their shingles." Its advice: "Check with the asphalt shingle manufacturer to determine if a specific field treatment is acceptable for use with their roofing shingles." It also warns that field treatments may affect fire, algae and impact ratings.
• A manufacturer's warranty text: we read GAF's published shingle limited warranty. It does not mention sprays or coatings by name. It does say the warranty does not apply to "Damage resulting from anything other than an inherent manufacturing defect in the GAF Products".

Our read, as opinion: a spray does not automatically cancel a shingle warranty. But a manufacturer only ever pays for factory defects. If it can point to something applied after the fact, you should expect it to. On a 15-year-old roof the practical stakes are small, because most shingle warranties are heavily prorated by then. On a younger roof, get the manufacturer's answer in writing first.

Roof Maxx Pros and Cons

What Is Fair to Say in Its Favor

• Accredited-lab tests show aged three-tab shingles bend better and hold granules better after treatment.
• Treated 12-year-old shingles rated Class A in 2020 ASTM E108 fire tests.
• By the company's example it costs a fraction of a tear-off, and it is done in hours.
• No tear-off means nothing goes to the landfill that day.
• The tune-up puts someone on the roof fixing small things that often go ignored.
• The company publishes its own limits, including the 30% granule cutoff.
• The corporate BBB record is clean for the size of the operation.

What Counts Against It

• No public long-term field study. The five-year figure rests on lab tests run days after treatment.
• The main testing was requested by the company and funded by a soybean council.
• The shingle manufacturers' association advises against it.
• The warranty covers flexibility only. Leaks, granule loss and installation faults are excluded.
• It does not fix leaks, flashing, decking, nail pops, seal strips or a hot attic.
• It does not change the roof's age on an insurer's or a buyer's paperwork.
• The cost repeats every five years, and the replacement bill still comes due.
• If the roof fails anyway, the money spent on the spray is gone.
• The result depends on the local dealer who qualifies and sprays the roof.

Spray vs. Repair vs. Replace

These are three different tools for three different problems. The mistake we see is using one in place of another.

In our experience a leak on a ten-year-old roof is nearly always a roof repair, not a spray and not a new roof. A 22-year-old three-tab roof with bald shingles is a roof replacement, however good the pitch for anything else sounds. The hard calls sit in between. Our repair vs. replacement guide walks through those.

The New Jersey Angle: Weather and Insurers

The main testing above was done on shingles from one Ohio roof. Four things about roofs here belong in the decision.

Freeze-Thaw

Essex County roofs swing across the freezing line again and again each winter. Brittle shingles crack when they flex cold, which is exactly the property a rejuvenator targets. That is the best argument for one here. But freeze-thaw also works on nail holes, flashing joints and ice at the eaves. Oil in the shingle does nothing for any of those.

Nor'easters

Wind takes shingles off when the seal strip lets go. Roof Maxx says its product is meant to penetrate the asphalt, "not the sealant strip," and that on very old roofs "hand-sealing after treatment may be recommended to ensure wind resistance." If your tabs already lift by hand, a spray will not keep them on in a coastal storm. Hand-sealing might, and that is repair work with its own cost.

Insurers and Roof Age

New Jersey insurers pay close attention to how old a roof is. Our guide to roof age and insurance non-renewal in NJ covers the cutoffs. A treatment does not change the install date. Roof Maxx's own site says it has helped some homeowners get coverage on older roofs, and in the same sentence says "each case varies." If the reason you want a spray is a letter from your carrier, do this first:

• Ask your agent, in writing, whether the carrier will accept a treatment in place of a replacement.
• Get the answer in writing before you pay anyone.
• Ask what the carrier would accept instead, such as an inspection report showing remaining life.

Local Rules and Door Knockers

ARMA advises checking with your local building department, and your homeowners association if you have one, before any field treatment. We have not found a New Jersey rule on the subject and we are not claiming one exists. Separately, any roof product sold at your door after a storm deserves the same checks as any other contractor. Our guide to roofing scams in NJ lists them. That is not a comment on Roof Maxx dealers. It is how to hire anyone who works on your roof.

What a Roof Inspection Settles

Every question in this guide comes back to the condition of one particular roof. A proper look answers them in about the time it takes to read this page. Here is what gets checked:

1. Shingle type and real age. Three-tab and architectural shingles age on different clocks.
2. Granule cover. On the slopes, in the gutters and at the downspouts.
3. Brittleness. A few tabs lifted by hand on the sunny side and the shaded side.
4. Seal strips. Whether tabs are still bonded where the wind hits hardest.
5. Flashing, boots and nail pops. Where most leaks actually start.
6. Decking. A walk test on top, and a look at the sheathing from the attic for stains, sag or daylight.
7. Attic heat and airflow. A hot attic cooks shingles from below, and no spray fixes that.
8. Layers. Whether there is a second roof hiding under the first.

You should come away with photos, a plain read on how many years the roof has left, and a written scope if any work is needed. With that in hand, a spray quote, a repair quote and a replacement quote can each be judged on the facts. If you are in Essex County, R&E Roofing's roof inspection service covers every item on that list.

Questions Homeowners Ask About Roof Maxx and Roof Rejuvenation

The Short Version

In our opinion Roof Maxx is not a scam, and it is not a new roof in a sprayer. It is a soybean-oil treatment with real lab results on flexibility and no public proof yet of the five-year claim on real houses. The shingle manufacturers' association advises against it. The company's own site says it is for intact shingles only. The deciding fact is the shape your roof is in today.

So do not start with the product. Start with the roof. Have it inspected, get the photos, and then decide whether you are looking at a spray, a repair or a replacement. You can reach R&E Roofing in Orange, NJ at (667) 204-1609, Monday through Friday, 9 to 5.

Sources We Read (September 20, 2026)

• Roof Maxx: home page claims, pricing page, warranty and how it works
• The Ohio State University, Roof Maxx Technical Report, with the December 2017 PRI lab report attached (copy hosted by a Roof Maxx dealer)
• Intertek, ASTM E108 fire test report, April 2020
• ARMA technical bulletin: Application of Coatings or Rejuvenators on Asphalt Shingles After Installation
• Kuehl et al., International Journal of Pavement Research and Technology, 2025
• Professional Roofing (NRCA), "Myth busting," April 2010
• InterNACHI, Mastering Roof Inspections: Asphalt Composition Shingles, Part 30
• BBB business profile, Roof Maxx Technologies LLC
• GAF Shingle & Accessory Limited Warranty
• U.S. District Court, S.D. Ohio, case 2:20-cv-03151 (govinfo.gov)