GreenGuard DC14 Drainage Mat

GreenGuard DC14 Drainage Mat

Extruded polystyrene (XPS) drainage mat designed to provide rainscreen protection, continuous insulation, and enhanced moisture management behind exterior cladding systems.

• Dual drainage channels enable efficient water runoff and airflow
• Provides R-1 continuous insulation (CI)
• Supports rainscreen construction principles
• Highly moisture resistant and resists mold growth
• Compatible with fiber cement, wood, and foam-backed vinyl siding
• Ideal for use behind stucco and stone veneer systems
• Promotes wall drying and long-term durability

Product Specifications

Documents & Resources

• Product Data Sheet
• Safety Data Sheet (SDS)
• Technical Bulletins
• Installation Guides
• Technical Info

Frequently Asked Questions

Can building wrap be installed in any orientation?

No, drainage channels must be installed vertically or slightly angled from vertical to function properly. Horizontal installation reduces drainage performance.

Should fanfold or building wrap be installed first?

Installation order depends on the project. For full replacements, install fanfold first, then wrap. For existing windows, install wrap first, then fanfold.

Can house wraps be used under any exterior facade?

House wraps are suitable for most cladding systems and are required by building codes as water-resistive barriers, though some systems may require multiple layers.

Why use a house wrap?

House wraps improve thermal performance by reducing air leakage and protect wall systems from moisture, helping prevent material degradation.

Can fanfold siding underlayment replace building wrap?

Yes, when compliant with ICC-ES AC71 and installed per guidelines, it can serve as a water-resistive barrier without additional wrap.