Backer Rod and Sealant Joint Design in Exterior Walls
Sealant joints are critical to the integrity of the building enclosure. When combined with properly sized backer rod, joints provide flexibility, airtightness, and water resistance at cladding transitions, penetrations, and dissimilar materials. This article outlines how to detail and install backer rod and sealants for high-performance joints in exterior walls. Functions of Backer Rod and […]
Detailing Penetrations Through WRBs and Air Barriers
Every pipe, conduit, duct, or fastener that penetrates the building enclosure represents a potential leak point. This article outlines best practices for air sealing and flashing penetrations through WRBs (Water-Resistive Barriers) and air barriers to ensure continuous control layers and long-term performance. Common Penetration Types Air and Water Barrier Detailing Use pre-formed gaskets or fluid-applied […]
Zip System Sheathing Detailing and Taping Strategy
The Huber Zip System is a structural sheathing and WRB solution that requires proper taping and detailing to function as a high-performance air and moisture barrier. This article outlines best practices for field taping, transition detailing, and QA when using Zip panels. Zip System Overview Panel Installation Guidelines Taping and Transition Sealing Use Zip System […]
Drainable Housewraps and WRB Installation Best Practices
Drainable housewraps, also known as enhanced WRBs (Water-Resistive Barriers), provide a textured or channeled surface that allows incidental water to drain from behind cladding. This article explains how to select, install, and inspect WRBs for optimal moisture management and air barrier continuity. Benefits of Drainable WRBs Installation Best Practices Integration with Windows and Cladding QA […]
EIFS Drainage, Backwrapping, and Termination Detailing
Exterior Insulation and Finish Systems (EIFS) require precise detailing to manage moisture, protect thermal layers, and maintain the integrity of the cladding system. This article outlines best practices for drainage EIFS, including backwrapping, base-of-wall terminations, and flashing integration. EIFS Drainage Systems Backwrapping and Insulation Termination Backwrapping protects insulation edges from delamination and UV exposure. Wrap […]
Brick Veneer Drainage Cavity and Flashing Design
Brick veneer walls must include a continuous drainage plane behind the cladding to prevent moisture accumulation, freeze-thaw damage, and deterioration of inner wall components. This article outlines best practices for detailing cavity spacing, flashing, and weep systems in residential and commercial veneer assemblies. Drainage Cavity Design Guidelines Flashing at Base, Lintels, and Openings Install through-wall […]
Detailing Control Joints in Stucco and EIFS Systems
Control joints in stucco and EIFS (Exterior Insulation and Finish Systems) are essential for managing movement stresses and preventing unsightly cracking. This article explains proper detailing and installation methods to maintain performance and aesthetics. Why Control Joints Are Critical Control Joint Placement Guidelines Industry standards (ASTM C1063 for stucco, ASTM E2568 for EIFS) recommend: Flashing […]
Parapet Detailing for Air, Water, and Thermal Control
Parapets are one of the most vulnerable locations in the building envelope. This article outlines critical detailing steps for maintaining control layer continuity across parapets and roof-wall transitions, ensuring thermal efficiency, water resistance, and long-term durability. Typical Parapet Failures Control Layer Coordination Detail all four control layers (air, vapor, water, and thermal) across the wall, […]
Roof Drain and Scupper Integration in Low-Slope Assemblies
Low-slope roof systems must be designed with positive drainage to avoid ponding water, structural loading, and membrane deterioration. This article details the integration of roof drains and overflow scuppers with membranes, insulation, and vapor barriers. Primary and Secondary Drainage Systems Flashing and Membrane Integration Drains should be fully clamped into place with compression rings or […]
Flashing Roof Penetrations: Pipes, Vents, and Equipment Curbs
Penetrations in roof membranes are one of the most common sources of leaks. This article covers how to flash pipes, exhaust vents, and rooftop mechanical curbs using tested, reliable detailing methods and code-compliant materials. Common Roof Penetration Types Flashing Strategy and Sequencing Code and Warranty Considerations Use manufacturer-approved accessories to avoid voiding membrane warranties. NRCA […]
