DuPont Styrofoam™ Brand XPS Insulation is presented as a straightforward material for contractors to install, though long-term performance relies on proper installation techniques. Achieving optimal performance and longevity requires careful attention to adhesive selection, fastener choices, and seam sealing. This article details recommended practices for installing Styrofoam™ Brand XPS Insulation, based on guidance from DuPont and associated manufacturers.
Adhesive Recommendations
Adhesives are crucial for securing Styrofoam™ Brand XPS Insulation effectively. DuPont adhesives are generally compatible with most construction materials and offer dependable, long-term service. Great Stuff Pro™ Construction Adhesive is the most commonly recommended adhesive for use with this insulation. However, other DuPont adhesives are also suitable depending on the specific application. When considering adhesives from other manufacturers, it is essential to verify compatibility with polystyrene-based insulations by checking the adhesive container or contacting the manufacturer directly. A comprehensive list of compatible adhesives can be obtained from local suppliers or by exploring DuPont’s adhesive solutions.
Fastener Selection
The appropriate fastener for Styrofoam™ Brand XPS Insulation is application-dependent. There is no single, universally suitable fastener. Several manufacturers produce fasteners suitable for use with XPS insulation, and consulting a local construction supplier is recommended to determine the best option for a particular project. Some manufacturers of suitable fasteners include:
- Hohmann & Barnard, Inc. (Ties and Anchors)
- TRUFAST® Walls (Brick Veneer Anchors)
- Heckmann Building Products, Inc. (TRUFAST® Walls)
- Hilti (Concrete or Masonry Wall Fasteners)
- UCAN Fastening Products (Concrete or Masonry Wall Fasteners)
- ITW Buildex (TAPCON concrete anchors)
Continuous Insulation and Fastener Considerations
Achieving continuous insulation is optimal, as it minimizes thermal bridging caused by metal fasteners. Continuous insulation is defined as insulation where only fasteners penetrate the material. DuPont provides downloadable resources illustrating the differences between z-furring and continuous insulation techniques.
Addressing Wall Anomalies
When installing Styrofoam™ Brand XPS Insulation, builders must account for the added thickness of the foam board, particularly around wall anomalies such as windows and bumpouts. This increased thickness can impact the installation of trim, flashing, and housewrap. Careful planning and attention to detail are necessary to ensure a proper and weather-tight installation.
System-Based Envelope Design
Effective installation requires considering the building envelope as a complete system. Integration with other components, such as openings and intersections, is critical. Wider flashing or other detailing may be necessary to accommodate the insulation’s thickness and maintain proper weather protection. Proper sequencing with flashing and housewrap remains essential for a durable and energy-efficient building envelope.
Calculating Insulation Requirements
Determining the correct amount of Styrofoam™ Brand XPS Insulation needed for a project is straightforward. The required amount of XPS board will generally equal the amount of wood sheathing specified. DuPont representatives have calculators available to assist dealers and customers in selecting the appropriate amount of insulation to meet local building codes for each climate zone.
Sealing Sheathing Seams
Properly sealing seams in the sheathing is vital to reduce air infiltration and maximize the insulation’s performance. Specific sealing techniques are recommended to ensure an airtight barrier. The documentation does not detail specific sealing techniques.
Importance of Following Manufacturer Instructions
The documentation consistently emphasizes the importance of adhering to the manufacturer’s installation instructions. These instructions provide detailed guidance on proper installation procedures and ensure optimal performance and longevity of the insulation system.
Conclusion
Successful installation of Styrofoam™ Brand XPS Insulation relies on careful consideration of adhesive and fastener selection, attention to wall anomalies, and a system-based approach to envelope design. Prioritizing continuous insulation and properly sealing seams further enhances performance. Following manufacturer instructions is paramount to achieving a durable, energy-efficient, and effective building envelope. Consulting with local suppliers and utilizing DuPont’s expert resources can provide additional guidance for specific project requirements.