If you have recently heard the phrase “concrete cancer” connected to swimming pools in Central Texas, you may feel like every crack is suddenly a warning that the entire pool must be demolished. That is not a helpful way to approach the subject.
The best response is not panic. It is a step-by-step process: understand what the condition is, identify what is actually known about the individual pool, obtain the right inspections, protect the important real estate deadlines, and make a decision based on evidence rather than fear.
This guide brings the major questions together in one place. It is designed for Central Texas buyers, sellers, homeowners, and anyone trying to understand how concrete cancer may affect a swimming pool and a real estate transaction.
TLDR: Understanding Concrete Cancer in Swimming Pools Without Panicking
- Concrete cancer is the common name often used for alkali-silica reaction, or ASR, in affected concrete.
- ASR is a documented Central Texas pool problem, but there is no reliable evidence that most area pools are affected.
- Cracks, water loss, movement, and recurring repairs deserve attention, but they do not confirm ASR by themselves.
- Diagnosis may require a pool specialist, engineer, core sampling, petrographic examination, or laboratory testing.
- Buyers and sellers should focus on documentation, inspection findings, repair reliability, cost, insurance, financing, disclosure, and future resale.
What Is Concrete Cancer?
Concrete cancer is an informal term. In the current Central Texas swimming-pool discussion, it commonly refers to alkali-silica reaction, usually shortened to ASR.
Concrete contains cement, water, sand, and larger pieces of stone or gravel called aggregate. Some aggregates contain forms of silica that can react with alkalis in the concrete when enough moisture is present. That reaction can create a gel that absorbs water and expands.
As the gel expands, it can create internal pressure within the concrete. Over time, that pressure may contribute to cracking, movement, increased permeability, and deterioration.
A swimming pool presents a particular concern because the concrete shell is expected to hold water continually. Moisture is part of the pool’s normal environment, which can make an ASR-susceptible concrete mixture more difficult to manage.
For a deeper explanation, read What Is Concrete Cancer in a Swimming Pool?.
Why Has This Become Such a Central Texas Issue?
A 2024 forensic engineering paper published through the American Society of Civil Engineers reported more than 100 pools in and around Central Texas affected by ASR. The paper described varying levels of cracking and noted that many affected pools were no longer retaining water.
That is enough to establish that this is a serious regional issue. It is not enough to conclude that most Central Texas pools have concrete cancer.
There is no complete public database showing every pool in the region, every confirmed ASR diagnosis, every privately resolved claim, or every pool with similar symptoms caused by another condition. Without those numbers, nobody can responsibly state a reliable percentage of affected pools.
Read Is Concrete Cancer Common in Central Texas? for a more detailed discussion.
Does Every Pool Built After 2017 Have Concrete Cancer?
No. A construction year may help identify a pool that deserves more questions, but it does not diagnose ASR.
The year alone does not tell you:
- Which aggregate was used
- Which concrete mixture was supplied
- Whether the aggregate was reactive
- What alkali loading was present
- How the concrete was placed and cured
- Whether the shell is currently expanding
- Whether visible cracks have another cause
Many pools built during the same general period may perform normally. Two pools built in the same year can have different builders, suppliers, soils, drainage, maintenance histories, and construction methods.
What Are the Common Warning Signs?
Possible warning signs include:
- Map-like or irregular cracking
- Long cracks that appear aligned with structural features
- Cracks that return after cosmetic repair
- Cracking that extends beyond the interior finish
- Movement in tile, coping, steps, benches, or decking
- Bulging, distortion, or separation
- Unexplained water loss
- Repeated plaster or finish failure
- White, clear, or gel-like deposits near cracks
- Engineering, insurance, or warranty records mentioning ASR
None of these signs confirms concrete cancer. Pool cracking may also result from soil movement, shrinkage, plumbing leaks, hydrostatic pressure, drainage problems, workmanship, corrosion, or ordinary finish deterioration.
See Common Signs of Concrete Cancer in a Pool for a complete guide.
How Is ASR Confirmed?
A photograph cannot reliably confirm ASR. A visual inspection may identify conditions that justify further evaluation, but the underlying process occurs inside the concrete.
A qualified investigation may include:
- A detailed visual condition survey
- Crack mapping and monitoring
- Review of construction and repair records
- Leak-detection testing
- Core sampling
- Petrographic examination
- Laboratory testing
- Engineering analysis of current damage and future expansion
Petrography involves detailed examination of concrete and its components, often using prepared samples and microscopy. It may help identify reaction products, cracking around aggregate, and other internal evidence consistent with ASR.
Can a Regular Home Inspection Find Concrete Cancer?
A general home inspector may identify visible cracks, water loss, movement, unsafe equipment, or other concerns and recommend further evaluation. That is valuable, but it is not the same as confirming ASR.
A dedicated pool inspector may provide a deeper review of the pool shell, equipment, circulation, heater, plumbing, safety features, and visible repair history. Structural or materials questions may still require an engineer or laboratory.
Read Pool Inspection vs. Home Inspection and How to Inspect a Pool Before Buying a Home.
What Should Buyers Ask Before Purchasing a Home With a Pool?
Buyers should ask:
- When was the pool built?
- Who built it?
- Has the pool ever leaked?
- Has it been replastered or structurally repaired?
- Have cracks returned after prior repairs?
- Are inspection or engineering reports available?
- Has anyone mentioned ASR or concrete cancer?
- Were insurance or warranty claims filed?
- Are repair warranties transferable?
- Can the pool be insured on acceptable terms?
Read Questions to Ask Before Buying a Home With a Pool for a complete checklist.
Can Concrete Cancer Be Repaired?
Possibly, but “repairable” can mean different things.
A proposed repair may be intended to:
- Seal a current leak
- Improve appearance
- Reconnect cracked concrete
- Strengthen the shell
- Reduce moisture exposure
- Control movement
- Extend the pool’s usable life
- Replace part or all of the shell
A cosmetic patch or new plaster may improve appearance without stopping an active reaction inside the concrete. When the shell continues expanding, repaired cracks may reopen or new cracks may appear.
Some affected structures can be monitored, mitigated, strengthened, or repaired. Others may require substantial reconstruction or replacement when cracking is widespread, future expansion remains significant, the shell cannot retain water, or the repair uncertainty becomes too great.
Read Can Concrete Cancer in a Pool Be Repaired?.
How Much Does Repair Cost?
There is no standard repair price because the cost depends on the diagnosis, damage, repair method, engineering, permits, plumbing, tile, coping, decking, equipment, landscaping, and whether rebuilding is necessary.
The complete cost may include:
- Engineering and laboratory testing
- Leak detection
- Demolition and hauling
- Structural repair or reconstruction
- Plumbing and electrical work
- Interior finish, tile, and coping
- Deck removal and replacement
- Equipment replacement
- Permits and inspections
- Landscaping and fencing restoration
- Future monitoring
A low estimate may not be a bargain when it excludes engineering, permits, decking, plumbing, or restoration. Compare complete scopes rather than headline prices.
Read How Much Does It Cost to Repair Concrete Cancer?.
Does Home Insurance Cover Concrete Cancer?
Coverage depends on the policy, cause of loss, timing, exclusions, and evidence. ASR may develop gradually, which can lead insurers to examine exclusions involving deterioration, cracking, defective materials, faulty construction, seepage, or earth movement.
A separate sudden event may create a different coverage question from the underlying ASR. Owners should document the condition, preserve records, report potential claims promptly, and speak with the carrier before making permanent repairs whenever practical.
Buyers should not assume that a future policy will pay for a known condition that existed before closing.
Read Does Home Insurance Cover Concrete Cancer?.
How Can Concrete Cancer Affect Home Value?
A confirmed or suspected pool problem can affect value by reducing buyer demand, increasing uncertainty, lengthening marketing time, complicating insurance and financing, and changing the price buyers are willing to pay.
The value effect is not always equal to the repair estimate. Buyers may also discount for:
- Risk that the scope will increase
- Loss of pool use
- Project management and inconvenience
- Future disclosure obligations
- Insurance and financing concerns
- Resale uncertainty
A documented repair with a transferable warranty may be treated very differently from a pool with recurring cracks and no reliable diagnosis.
Read How Concrete Cancer Affects Home Value.
Should You Buy a House With Pool Damage?
A damaged pool does not automatically make a home a bad purchase. The buyer should understand:
- The likely cause
- The seriousness of the damage
- The reliability of the repair plan
- The complete cost and contingency
- The project timeline
- Insurance and financing implications
- The effect on future resale
- Whether the price reflects the risk
The home may still make sense when the condition is understood, the price is appropriate, the repair is credible, and the buyer has enough financial and emotional room to manage the project.
Walking away may be reasonable when the cause cannot be determined, the scope remains open-ended, the seller refuses documentation, or the buyer cannot absorb the worst reasonable outcome.
Read Should You Buy a House With Pool Damage?.
What Should Texas Sellers Disclose?
Texas Property Code Section 5.008 establishes a seller disclosure notice for many sales of previously occupied single-family residential property. The notice reflects the seller’s knowledge of the property’s condition as of the date signed and is not a substitute for buyer inspections.
Texas REALTORS reported that its revised Seller’s Disclosure Notice, effective June 15, 2026, added Alkali-Silica Reaction, also known as concrete cancer, to Section 3.
Sellers should provide known facts rather than guess at technical causes. Relevant information may include structural cracks, leaks, prior repairs, inspections, engineering reports, testing, insurance claims, warranty claims, and known ASR findings.
Read Texas Seller Disclosure for Pool Damage.
Should Sellers Repair the Pool Before Listing?
Repairing before listing may make sense when the cause is known, the scope is dependable, the work can be completed properly, and the repair is likely to improve marketability enough to justify the cost.
Selling in the current condition may be more practical when the diagnosis is uncertain, the repair may become a full rebuild, timing matters, or the seller cannot absorb the cost and risk.
Whichever path is chosen, documentation matters. Buyers generally respond better to a known, well-documented condition than to an unexpected one.
Read Should Sellers Repair Pool Problems Before Listing?.
Can a Pool Cause a Home Sale to Fall Apart?
Yes. A pool can disrupt a transaction when:
- The inspection reveals unexpected damage
- The repair cost cannot be determined
- The buyer and seller cannot agree on a solution
- The lender requires repairs
- The insurer will not accept the condition
- The appraisal comes in low
- The seller disclosure conflicts with the pool’s history
- Specialized testing cannot be completed before the option period ends
A pool problem does not automatically end the sale. Early inspections, accurate disclosure, complete documentation, realistic estimates, and carefully written agreements can create a path forward.
Read Can a Pool Cause a Home Sale to Fall Apart?.
Can Good Maintenance Prevent Concrete Cancer?
Good maintenance cannot guarantee that ASR will never occur. Maintenance cannot change reactive aggregate already inside the shell.
It can still help by:
- Protecting the finish and equipment
- Identifying leaks earlier
- Limiting uncontrolled water around the pool
- Keeping drainage working
- Documenting cracks and changes
- Preventing unrelated problems from complicating the condition
Read How to Maintain Your Pool to Help Prevent Future Concrete Problems.
A Calm Step-by-Step Plan for Homeowners
- Document what you see. Take dated photographs and note water loss, movement, or recurring cracks.
- Gather records. Find construction documents, service invoices, repairs, reports, claims, and warranties.
- Start with the right professional. A qualified pool specialist may be the first step, followed by leak detection, engineering, or materials testing when needed.
- Do not cover the evidence too quickly. Cosmetic work may make diagnosis more difficult.
- Compare complete repair scopes. Make sure estimates address the same condition and include the same work.
- Understand the limits. Ask whether the proposal repairs appearance, leakage, structure, active expansion, or all of the above.
- Preserve the documentation. Records matter for warranties, insurance, disclosure, and future resale.
A Calm Step-by-Step Plan for Buyers
- Review the seller disclosure and pool records.
- Schedule the home and pool inspections immediately.
- Ask for specialized evaluations when the findings justify them.
- Protect the option period and other contract deadlines.
- Investigate insurance and financing before closing.
- Estimate the complete cost, including contingencies and restoration.
- Decide whether the risk fits your finances, timeline, and tolerance for uncertainty.
A Calm Step-by-Step Plan for Sellers
- Review the pool’s history before listing.
- Investigate visible cracks, water loss, and recurring repairs.
- Gather reports, invoices, warranties, permits, and claim records.
- Decide whether to repair or sell in the current condition.
- Complete the disclosure accurately based on what you know.
- Price the home with the condition and buyer reaction in mind.
- Avoid unsupported promises about future performance.
Frequently Asked Questions
Does every pool crack mean concrete cancer?
No. Cracks may result from several causes, including shrinkage, soil movement, leaks, workmanship, hydrostatic pressure, or ordinary finish deterioration.
Can ASR be diagnosed from a photograph?
No. Photographs can document symptoms, but diagnosis may require onsite evaluation, core sampling, petrography, laboratory testing, and engineering analysis.
Are all Central Texas pools built after 2017 affected?
No. Construction date may justify additional questions, but it does not prove that a pool contains reactive aggregate or has damaging expansion.
Does a repaired crack mean the problem is gone?
Not necessarily. A crack repair may stop leakage or improve appearance without stopping movement or reaction inside the concrete.
Does an ASR pool always need to be rebuilt?
No. Some pools may be monitored, mitigated, strengthened, or repaired. Replacement becomes more likely when damage, leakage, future expansion, or repair uncertainty is extensive.
Can homeowners insurance pay for the damage?
Possibly, but coverage depends on the policy, cause of loss, exclusions, timing, and supporting evidence.
Can a home with concrete cancer still be sold?
Yes. Buyers will likely evaluate the diagnosis, repair plan, documentation, warranty, insurance, financing, price, and future resale implications.
Should a buyer automatically walk away?
No. The buyer should first determine what is known, what remains uncertain, what the likely cost is, and whether the risk fits the buyer’s financial plan.
Can maintenance prevent ASR?
Maintenance cannot change reactive materials already in the shell, but it can help identify leaks and movement early and reduce avoidable damage around the pool.
My Bottom Line
Concrete cancer in swimming pools should be taken seriously, but it should not be treated as a reason to panic. The phrase sounds dramatic, while the actual decision requires patience, inspection, documentation, and qualified analysis.
The safest approach is to separate what is known from what is suspected. Do not diagnose the pool from its age, neighborhood, builder, or a single crack. Do not assume a cosmetic repair solved a structural condition. Do not assume insurance will cover a preexisting problem. Do not let a short transaction deadline force you to ignore unanswered questions.
Understand the individual pool, gather the evidence, bring in the appropriate professionals, and make the decision that fits the property, the transaction, and your tolerance for risk.
