Flat-roof homes across Cave Creek, Carefree, North Scottsdale, Desert Hills, New River, and Rio Verde share a common issue that leads to hidden, persistent water leaks: parapet wall failures. These leaks often appear far from the actual source, confusing homeowners and contractors who misdiagnose the problem.

At Bild LLC, we specialize in leak detection and parapet waterproofing, and we see the same failure pattern on almost every home:

Stucco and Paint Are Not Waterproof – and Builders Used a Vertical-Rated Membrane on a Horizontal Surface

Most parapet walls in Arizona were built using a WRB (weather-resistant barrier) on top of the parapet. That material is only approved for vertical applications.

But parapet tops are:

• Horizontal
• Exposed to ponding water
• Hit with intense UV
• Exposed to wind-driven monsoon rain

As a result, the WRB breaks down prematurely and allows water to infiltrate the parapet, run down the wall cavity, and appear inside the home.

And because stucco and exterior paint are NOT waterproof, the problem gets worse each time it rains.

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Why Parapet Walls Leak in Arizona

1. The wrong material was used on top of parapets

A vertical WRB was installed horizontally, guaranteeing early failure.

2. No slope on parapet tops

Water sits and penetrates the system.

3. Missing coping or protective caps

The parapet is left completely exposed.

4. Monsoon wind-driven rain

Sideways rain forces water deep into small openings.

5. Moisture travels inside the wall cavity

This is why leaks show up far away from the parapet itself.

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Signs Your Parapet Is Leaking

Parapet leaks rarely show symptoms at the parapet. Instead, they show up inside the home where wall and ceiling assemblies are weakest.

1. Water stains above windows and doors (drywall returns)

This is the #1 sign of a parapet leak.

Most Arizona homes use drywall returns, not wood trim. These are thinner and reveal moisture quickly. Water from the parapet travels down the interior wall and appears:

• Above windows
• Above doors
• In the corners of drywall returns

Homeowners often think it’s a window leak – but the parapet is the actual source.

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2. Staining or bubbling where walls meet ceilings

Water can track horizontally before dropping at ceiling lines.

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3. Soft, sagging, or bubbling drywall

Chronic parapet leaks saturate insulation and framing long before reaching the visible surface.

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4. Drips during or after storms

If water appears hours after rain stops, the parapet has almost certainly failed.

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5. Roof membrane issues near parapet bases

Peeling coating or cracked transitions indicate moisture is coming from above, not from the flat roof.

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**How Bild LLC Fixes Parapet Leaks

(Smart, Simple, Long-Lasting – No Stucco Removal Needed)**

Instead of tearing into stucco or rebuilding parapets, Bild LLC uses a proven, roofing-grade repair system installed directly over the existing stucco on the parapet top.

This is the correct way to waterproof parapets in Arizona.

We install the Three-Course Mule-Hide A200 System directly over the stucco.

This makes the repair:

• Non-invasive
• Durable
• UV-resistant
• Designed for horizontal waterproofing
• Affordable compared to reconstruction
• Ideal for monsoon conditions

A200 is already UV-resistant – no additional coating is applied.

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Our Parapet Repair Method Using Mule-Hide A200 (Applied Directly Over Stucco)

Step 1 – Clean and Prepare the Parapet Top

We remove dust, loose materials, and contaminants so the A200 bonds properly.

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Step 2 – Apply the Three-Course Mule-Hide A200 System

This includes:

1. Base layer of Mule-Hide A200 flashing cement

Applied directly over the existing stucco.

2. Reinforcement fabric embedded into the A200

Creates a strong, flexible membrane that withstands movement and prevents cracking.

3. Second application of A200 fully encapsulating the fabric

Forms a thick, durable, waterproof membrane on top of the parapet.

Important:

A200 is already UV-resistant, so we do not apply coating over it.

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Step 3 – Seal All Seams and Corners

We reinforce parapet transitions and movement areas to prevent future leaks.

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Why This Method Works (When Other Repairs Don’t)

✔ No stucco removal

Avoids unnecessary damage and cost.

✔ Stops water at the true entry point

The parapet top – not the wall, window, or roof.

✔ Uses a roofing-grade waterproofing system

Not paint, caulk, or stucco patch material.

✔ UV-resistant and designed for horizontal exposure

Unlike the original WRB that failed prematurely.

✔ Clean, simple, and extremely effective

This is the proper solution for Arizona parapet leaks.

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Why Choose Bild LLC for Parapet Leak Detection & Repair

Most companies misdiagnose parapet leaks as:

• Roof coating issues
• Window leaks
• Stucco failures

We specialize in water intrusion diagnostics and know exactly how parapet leaks behave.

Bild LLC provides:

• Professional leak detection
• Parapet waterproofing
• Mule-Hide A200 systems
• Flat roof repair
• Viga and latilla replacement
• Exterior waterproofing solutions

We fix the problem once, the right way.

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Serving Arizona’s Foothills & North Valley

Proudly serving:

• Cave Creek
• Carefree
• North Scottsdale
• Desert Hills
• New River
• Rio Verde
• Phoenix & surrounding areas

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Schedule a Parapet Leak Inspection Today

If you’re seeing water stains above windows, drips during storms, or ceiling-line bubbling, your parapet is almost certainly the cause.

Bild LLC – Leak Detection & Exterior Waterproofing Specialists
📞 480-818-8839
🛠️ Parapet Repair • Leak Detection • Mule-Hide A200 Systems • Roofing & Waterproofing

View Our Gallery to see pictures of this system when fully finished!

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