The Homeowner’s Guide to Roof Rejuvenation

Understanding Your Home

Rejuvinating Spray

The modern roof rejuvenation industry started developing in the middle of 2000 to the early part of 2010. Roof Max was the first company to provide an asphalt roof rejuvenation service. The technology was developed by a partnership between Roof Maxx with agricultural and materials researchers. Marketing began between 2015 to 2016.

Roof rejuvenation is a new industry that has rapidly expanded through a network of franchises or dealerships. Each franchise is its own company that sets their own pricing, hires their staff, insurance and sets service standards.

It is a niche service, and traditional roofing companies have not adopted the roof rejuvenation service. The service is offered by contractors and specialized applicators. The roofing industry is divided, and the following two different views exist:

It is a maintenance product that is marketed to extend the life of an asphalt roof.

It is a limited treatment that does not address the problems that develop as the roof ages.

It is not a substitute for a roof replacement when the roof has reached end of life.

How Asphalt Shingles Age Asphalt shingles contain maltenes which are the oils that keep shingles flexible. Exposed to the elements they lose the petrochemical oils. This is the natural aging process of asphalt. UV exposure, heat, and oxidation deplete these oils over time that causes the following conditions:

· Brittleness

· Cracking

· Granule loss

· Reduced flexibility

The Rejuvenation Process The spray contains micro‑beads of natural oil that penetrate the top layer of the shingle. Roof‑rejuvenation companies use plant‑based oils, typically soybean‑oil formulas, to soften aging asphalt shingles and reduces brittleness. These products are used to replace the oils lost overtime through oxidation. Their purpose is to restore flexibility, slow the aging process, and extend the life of the roof.

The application typically takes 1 to 3 hours and requires about 72 hours to fully absorb. Independent reporting describes these as liquid treatments applied to the roof surface to temporarily improve flexibility and slow granule loss. Absorption varies widely from shingle to shingle that can result in uneven applications. A reputable company includes a “roof tune-up” before the application. Minor repairs are usually included in the service price which includes the following:

· Hammering down and sealing exposed nail pops

· Re-securing or replacing loose or missing shingles

· Re-sealing flashings and other vulnerable spots

· A visual inspection of the overall roof structure

Note: The spray treatment does not rebuild the asphalt binder, replace granules, or repair structural issues and the spray is only surface level. If there is substantial damage or the roof is at the end of its life cycle, full replacement should be recommended.

Oil Penetration is Surface Level The oils do not reach the full depth of the asphalt mat. They do not correct the following structural failures:

· The asphalt binder

· The fiberglass mat

· Thermal cracking

· Lifted shingles or nail pops

· The cracks, splits, or hail bruising

Roof Rejuvenation Marketing It is marketed as an extension for the life of the roof at a lower cost vs a replacement.

· Roof replacement alternative

· Method to restore flexibility and slow granule loss

· Way to extend roof life up to 15 years with repeated treatments

They also advertise a “tune‑up” that includes hammering down nail pops, sealing flashings, and minor repairs before spraying.

Independent Evaluation — The Ohio State University (OARDC) OSU researchers conducted laboratory testing on Roof Maxx using shingles taken from a 17‑year‑old roof. The testing included ASTM pliability and flexibility evaluations, with the lab work performed by PRI Construction Materials Technologies, an accredited testing lab used by shingle manufacturers. OSU’s work was industry‑supported and focused on short‑term flexibility improvements, not long‑term roof life extension. The conclusions were as follows:

· The benefits are temporary

· The treatment cannot fix underlying aging

· It may delay, but not prevent, the need for replacement

· A full roof replacement remains the more durable, long‑term solution

Contractor and Roofing Association Review Independent roofing contractors and state roofing associations have published evaluations and field observations. These are not formal scientific studies but provide real‑world insight. Reviews consistently note short‑term flexibility improvements but limited evidence of long‑term 10 plus year benefit.

Consumer‑facing Technical Reviews Some third‑party roofing analysts and technical writers have reviewed the claims, comparing marketing promises with available data. These reviews emphasize that peer‑reviewed, long‑term studies are sparse, and results vary widely depending on roof condition.

Note: No major shingle manufacturer has conducted or published independent studies validating rejuvenation sprays. No long‑term 10-to-20-year peer‑reviewed studies exist. Most testing focuses on short‑term pliability, not structural life extension. Rejuvenating service providers claim an 80% savings vs replacement cost of the roof.

Summary of Independent Evaluation

· The benefits are temporary

· The treatment cannot fix underlying aging

· A full roof replacement remains the only long‑term solution

· It may delay, but does not prevent the need for replacement

Treatment Benefits — The claims state that that the application adds 5 years of life to the roof. Independent sources state the effectiveness is temporary and depends heavily on the types of weather exposure. The science behind the oils is real for some roofs. Depending on the condition of the roof it can provide the following:

· Softens dried asphalt

· Slows oxidation

· Improve flexibility

· Reduces granule loss

For an older roof that is in good structural condition the treatment may buy a few extra years. Most companies claim 5 years per treatment and would need to have a treatment every 5 years.

Common Problems The following is the roof damage the treatment is unable to correct:

· Nail pops

· Lifted shingles

· Granule loss

· Hail bruising

· Thermal cracking

· Soft decking

· Cracked shingles

· Curled shingles

· Roof leaks

· Granule loss

· Structural issues

Insurance Company Standards Insurance companies classify roofs by age, condition, granule retention, and hail/wind vulnerability and do not recognize or give credit for roof rejuvenation spray treatments. A chemical spray does not change the following:

· Consider it a repair

· The age of the roof or its insurability

· Do not extend roof life on underwriting

· Do not waive replacement requirements

Roof Modifications It can cause the following issues:

· Trigger a roof inspection

· Void coverage for workmanship issues

· Lead to a non‑renewal if the roof is too old

Claims Evaluation Problems

· Sprays can darken shingles that make hail bruising harder to see

· Insurers may request documentation because the treatment is not recognized

· Sprays mask granule loss, making it difficult for adjusters to evaluate conditions

· The spray applied to close to the end of the life roof can trigger an underwriting review

Manufacturer Warranty Problems It can void manufacturer warranties. Most shingle manufacturers do not approve chemical treatments and may consider them a warranty‑voiding modification. “Any aftermarket coating or treatment not approved by the manufacturer may void the warranty.”

· It hides defects

· It alters the shingle’s surface chemistry

· It interferes with standard repairs or sealing

· Treatments do not improve hail or wind resistance

· Sprays offer limited protection in extreme weather areas

· The rejuvenating companies state that the product does not seal leaks

· They cannot guarantee how the chemical interacts with asphalt

What Spray Treatment Companies Do Not Repair They avoid touching anything that requires roofing skill or liability. Most rejuvenation companies are a franchise, not roofing contractors. Their technicians are trained to apply a spray; they do not evaluate or make roof repairs. They usually do not hire the following:

· Licensed roofers

· Manufacturer‑certified installers

· Experienced repair technicians

· Anyone trained to identify installation defects or storm damage

Note: Repairing defects would expose that the roof would not benefit from the spray treatment. This is the difference between marketing and the actual service.

Spray Companies Qualifications

· They are not hiring licensed or certified roofers in most states.

· Their business model is a quick 1 to 2 hours job.

· Repairs and evaluations require roofing skills, liability, and time.

Repairs Spray Companies Do Not Provide Most spray companies will not make the following minor repairs but will spray over them.

· Nail pops

· Cracked shingles

· Repair flashing

· Correct thermal splits

· Lift shingles to inspect

· Check for soft decking

· Replace damage shingles

Some Companies Advertise Minor Repairs Included This consist of minor repairs to mask the damage temporarily.

· Blowing off debris

· Hand‑pressing lifted shingles — no repair

· Caulking exposed nails — temporary repair

· Replacing 1–3 shingles if the homeowner provides them

Cost for Rejuvenating Spray Treatment Prices vary by region, roof size, slope, access, and condition over the roof.

Typical Cost

· $1.50 to $2.50 per square foot

· $150 to $250 per roofing square (100 sq ft)

Average Home — 2,000 square foot roof

$3,000 to $6,000 per treatment — with no repairs

Required Re‑Treatments — Suggested for every 5 years

Guidelines for a Roof Treatment Roof rejuvenation companies should follow these guidelines.

· No leaks

· No bad flashing

· Correct installation

· No major granule loss

· No widespread cracking

· Proper attic ventilation

· Minimal curling or cupping

· Roof is between 6 to 15 years of age

· No soft decking or sagging areas

· Shingles that are drying but not failing

· Shingles should have at least 5 years of remaining life

Regulations for Roof Rejuvenation Sprays There is no Federal or State regulations for this industry. Rejuvenation spraying is not classified as roofing work. “It is a regulatory grey zone.”

Lack of Expertise in the Industry Inspecting and evaluating is a kill that requires proper training and experience. Most of the workers in this industry lack the ability to evaluate condition and problems on a roof. Companies that provide training only focus on how to apply the product and basic visual checks.

There is a financial bias or incentive to qualify roofs for the treatment. Treatment on roofs that do not qualify is a waste of a homeowner’s money and may result in other issues for the roof performance, voided warranty, and insurance issues.

Questions Before Hiring Before you decide choosing a roof rejuvenating company ask the following questions.

· Are you bonded?

· Can you provide local references?

· Do you carry liability insurance?

· Do you provide a written warranty?

· Do you provide a written condition report?

· Do you provide before and after photos?

· Do you provide a written roof condition report before treatment?

· Does the price include the tune-up — nail pops, flashing, and loose shingles?

Protect Your Home Before deciding on paying for a rejuvenation spray treatment, do the following research. This step establishes a baseline condition of the roof before any treatment is considered.

· Get a Second Opinion — Have a certified roofer inspect your roof.

· Roof Warranty — Check your roof warranty with the manufacturer. Most asphalt shingle warranties have a clause for unauthorized modifications. It voids the warranty.

· Insurance Company — Call your insurance agent and discuss how it affects your coverage.

· Repairs — Repair any existing problems before considering a spray treatment.

Note: Most insurance companies do not recognize spray treatments as extending roof life. Roof rejuvenation can be a useful tool in limited circumstances. However, only when a roof that has been properly evaluated, independently verified, and fully repaired as needed.

Common Complaints about Rejuvenating Roof Spray

· Uneven application

· No visible improvement in shingles

· Shingles still cracking or curling

· Roof still needed replacement soon after treatment

· Misrepresentation — Told it would add 5 to10 years

· Continued cracking or granule loss

· Lack of detailed inspection before application

· Overpromised lifespan extension

Every roof is unique and there are many variables that determine how a roof ages. Asphalt shingle rejuvenation sprays are marketed as a solution for most roofs. However, all asphalt roofs are not the same. Asphalt roofs age differently based on the following:

· The design of the roof

· Quality of the asphalt shingle

· Quality of installation

· Manufacturing process

· Exposure to the elements

· The different climates

· Prior maintenance

· Attic ventilation

Note: Each roof is unique and there are many variables that determine how a roof ages. There is no one product that can produce the same result for every roof. Because these sprays are applied the exact same way every time, they cannot adapt to the unique chemical and physical condition of each roof.

Charles Johnston Realtor® | SRES, SRS, RENE, PSA, CHMS TREC License — 0506067 Keller Williams Fort Worth Phone: (817) 917 6234 Email: crjohnston65@outlook.com Website: charlesjohnston.kw.com

© 2025 Charles Johnston — Realtor All rights reserved. This guide is for personal use only and may not be reproduced, distributed, or sold without permission.