Everyone knows that water intrusion is bad news for a building. Air leakage, the same. But for long-term performance and protection, it’s important to keep both outside, away from interior walls and spaces.
Easy enough, right? Actually, it’s trickier than you might think.
Today’s buildings often include complex geometries and varied substrates. Plus, trade sequencing often creates potential failure points. Using multiple, uncoordinated products can also result in gaps or inconsistent adhesion. Successful systems require cross-compatible materials, trained application and field-tested detailing.
The Role of Continuity in AWRB Systems

The secret to air and water-resistive barrier (AWRB) success is continuity. In other words, continuity across those complex geometries and different substrates, and compatibility between all materials, transitions, penetrations and terminations—from foundation to parapet.
Why is this continuity so important? Because any break or incompatibility in the barrier can compromise performance, leading to condensation, mold growth or structural deterioration. A continuous air and water-resistive barrier, on the other hand, prevents moisture intrusion, air leakage and energy loss.
A Proven, System-Based AWRB Solution

The problem with many existing buildings is a piecemeal mix of materials and products that weren’t designed to work together and have been cobbled together as best the installers could manage. A better approach is the system approach.
StoGuard® is a proven, system-based AWRB solution that eliminates performance and risk gaps by maintaining continuity across materials, climates and design conditions. All the components of this trusted system have been designed to work together with precision.
The StoGuard® System
- Can be used behind Sto or non-Sto claddings, offering seamless integration across assemblies
- Combines liquid-applied and self-adhered membrane (SAM) options for flexibility and project-specific needs
- Features fluid-applied components that create a seamless, monolithic layer that easily covers complex shapes and penetrations
- Utilizes self-adhered components that provide immediate waterproofing and durability in extreme conditions
- A set of fully compatible accessories design for use and continuity at movement joints, substrate transitions, penetrations, transitions to roofing and below-grade air barriers, and rough openings.
- Employs a hybrid approach that allows mix-and-match compatibility for transitions, openings and challenging conditions
The StoGuard® Advantage

StoGuard® creates a continuous, compatible and tested barrier that meets modern building code and energy performance standards. The benefits to building owners are clear:
- Vapor-permeable and impermeable options are available to suit different climate zones and wall designs
- Tested assemblies are fire-rated and qualified for use on noncombustible construction
- Low-VOC, mold- and mildew-resistant formulations promote healthy indoor environments
- Designed to perform in cold, wet and high-humidity climates, enabling faster installation schedules
- Backed by Sto’s integrated wall system approach—one manufacturer, one system
The Best System for Design Freedom

But the benefits of StoGuard® don’t end there. By ensuring a consistent AWRB layer, StoGuard allows architects to focus on creative expression without compromising performance. They can get crazy with their geometry. They can go nuts with their different substrates. StoGuard will work beneath them all, quietly keeping air and water at bay for years to come.
StoGuard Delivers the Difference
Sto is a leader in integrated air and moisture barrier technology. StoGuard® is a clear example of why. With StoGuard®, air and moisture protection is seamless, tested and complete—ensuring the building envelope performs as designed. Simply put, it makes any wall a better wall.
To learn more, we invite you to download the updated StoGuard brochure for a full overview of components, system compatibility and application best practices. You can also visit our Documentation Center for system details and product specifications. Or you can talk to one of our experts at 800-221-2397.