Should you buy a house with EIFS or stucco?

Should you buy a house with EIFS or stucco?

A dry probe moisture test at the high-risk spots (windows, roof-wall joints, the base of walls) is the evidence that makes buying a house with EIFS or stucco a reasonable risk. Stucco and EIFS (exterior insulation and finish system, often called synthetic stucco) can both trap water and rot the framing out of sight. A standard home inspection only looks briefly at the outside. Ask the seller for written permission to test, and book it before your inspection deadline.

Key takeaways

• Wood behind EIFS rots once its moisture stays at 30%, per the International Association of Certified Home Inspectors (InterNACHI). Only a probe test measures that.
• Widespread damage is the expensive case: Redfin puts full remediation at $14,000 to $34,000+, and one central Indiana contractor puts water damage in older EIFS at $15,000 to $100,000.
• Texas's insurance regulator says most home policies don't cover a continuous water leak, so price the wall before you close.

What does it cost to fix stucco moisture damage?

The cost to fix depends on what the probe readings show.

For the rest of your report, Kept prices every line of an inspection report for $79, usually under 4 hours, and marks the ones that need a professional quote, like a stucco remediation.

Say the probe test finds wet readings under two windows, the wood there is still sound, and the rest of the house is dry. Redfin's national range for the probe test is $600 to $1,500+. Its range for minor moisture remediation adds $1,000 to $4,000. That's $1,600 to $5,500 or more, plus a retest after the repair, which your tester will quote.

Widespread wet readings point to the remediation rows. Send the seller a stucco contractor's written bid then, not a range from this table.

What's the difference between EIFS and stucco?

Traditional stucco is a plaster applied wet over brick, stone or wood. EIFS is foam board and fiberglass mesh covered with a polymer finish textured to look like stucco, according to InterNACHI. Your report may just say "stucco," so the specialist's first job is to confirm which one you have.

EIFS blocks water vapor. Water that gets in through a crack or a joint at a window, door or roof has no easy way out. EIFS is riskier when it was installed without drainage. Redfin says older EIFS homes are more vulnerable. It also flags hybrid or older systems from the 1950s to the early 2000s as prone to installation and drainage problems.

Hardcoat stucco is cement-based and breathes better, but it can crack or pull away when it was applied badly or the foundation shifts. Don't assume real stucco is safe. One Minnesota testing company says "real" stucco is what it has had so many problems with there.

What are the signs of moisture behind stucco?

The signs show up where water gets in. InterNACHI's EIFS checklist and Redfin's stucco guide name these:

• Finish running into the ground. EIFS should stop at least 6 inches above finished grade. Below grade, InterNACHI says cracks let in moisture and termites.
• No kickout flashing where a roof meets the wall. When it's missing, InterNACHI says "there is a good possibility that water is entering the wall cavity."
• Cracked caulk around windows and doors, or soft, discolored wood on the frames.
• Cracks, bulges, or patches that sound hollow when tapped (InterNACHI). Bulges can mean the finish is coming loose from the foam board.
• Signs indoors: stained or damp drywall, peeling paint, or windows that stay fogged.
• Water pooling or ground sloping toward the house. See negative grading on an inspection report.

None of these proves rot. They show the tester where to probe. On EIFS, InterNACHI says cracks in the finish let moisture into the wall, where it can cause rotting.

If your report already notes soft or rotted framing, treat it as structural. Get the probe readings, and a structural engineer's opinion if the tester finds rot, before your deadline.

What does a stucco moisture test cost?

A stucco moisture test is a probe test. The tester drills small holes, inserts probes to read the moisture in the wall cavity, and seals the holes afterward. InterNACHI's threshold: "When prolonged moisture intrusion of the wood behind the EIFS reaches 30%, rotting will occur." Redfin calls this the most accurate option, and the one to pick when you need to confirm or rule out hidden damage.

Most stucco inspections take 1 to 3 hours, and reports usually arrive in 24 to 48 hours, per Redfin. Structure Tech can run the test during the home inspection. It also needs its own release form signed by the seller and won't take an amended purchase agreement instead, so ask your tester for its form on day one.

What should you ask the seller for?

Ask the seller in two steps.

1. Before your deadline: written permission to run a probe moisture test. Book the tester as soon as it's signed. See how to get repair estimates during the inspection period for fitting a specialist into your window.
2. After the readings: a repair by a stucco contractor, with a retest to confirm it, or a credit equal to that contractor's written bid. Redfin puts moderate repairs at 2 to 5 days and major remediation at 1 to 3 weeks, longer if structural repairs are needed. Ask for a finish date before closing.

If the readings come back dry, ask only for the small items, like cracked caulk. Dry readings cover only the spots that were probed, and cracked joints still need sealing to keep the wall dry. What to ask for after a home inspection covers how this line fits your list, and the buyer repair request letter template covers the wording.

What if the seller says no?

If the seller won't allow the test, you'd be buying without the one reading that matters on a stucco house. Redfin notes that sellers may hesitate or refuse to have holes drilled. Ask whether your inspection contingency lets you cancel over it. Your contract sets the exact dates and terms, so confirm with your agent or attorney.

If the readings are wet and the seller won't repair or credit, you have the bid in hand. When to walk away after a home inspection weighs cost against what you still don't know.

How long does EIFS or stucco last?

InterNACHI's life expectancy chart lists stucco and EIFS together at 50+ years. The chart assumes regular maintenance, not neglect. Caulking on the same chart lasts 5 to 10 years, so ask when the joints were last redone.

Does homeowners insurance cover stucco moisture damage?

Usually not when the water got in slowly. The Texas Department of Insurance lists "a continuous water leak" among the damages most policies don't cover, and says policies "won't cover mold removal, except to repair damage caused by a covered risk." Coverages vary by company, so read the policy or ask your insurance agent before closing.

Where do other exterior findings fit?

Other exterior items are covered in exterior findings on an inspection report.

If your deadline is close and stucco is one line among many, upload your inspection report to Kept and send the seller one list with a number on every line that can be priced now.

Sources

• InterNACHI, Water Damage and EIFS
• InterNACHI, Stucco
• InterNACHI, Standard Estimated Life Expectancy Chart for Homes
• Redfin, What Is a Stucco Inspection, and Do You Really Need One?
• Structure Tech, Stucco Moisture Testing Minnesota
• Central Indiana Stucco Repair, Risks of Buying a Home with Older Standard EIFS
• CountBricks, Synthetic Stucco Cost Guide
• Texas Department of Insurance, Home insurance guide