Extruded polystyrene (XPS) fanfold siding underlayment arguably provides the best performance in the industry.

This state-of-the-art material is simple to install and comes with several top-tier features:
• Not susceptible to moisture damage
• Totally mold resistant
• Superior insulation properties that last over time and provide long-term energy efficiency
• Ultimate durability

GreenGuard® offers several types of siding underlayments to suit a variety of needs and applications. Contact us to learn more.