Window Drainage Plane™

Window Drainage Plane™ prevents entrapped moisture below windows.  The sub sill region of windows is an especially moisture-sensitive area.  MTI’s Window Drainage Plane™ allows moisture to escape from the sub sill area before it can cause problems.

Features/Benefits

• A unique product to drain moisture from the window sub sill area
• Creates a drainage plane in the sub sill region of the rough opening
• Rigid, durable and long lasting
• 100% post-industrial recycled plastic

Pair with MTI's Moisture Diverter™ for complete the ultimate risk management at windows.

• Prepare bottom of window rough opening with proper slope-to-drain surface
• Cut and place WDP on prepared surface at bottom of window; temporarily attach with dabs of construction adhesive
• Flash window rough opening according to window manufacturer’s instructions
• Install window
• View installation animation for detailed instructions

Contact MTI at 1-800-879-3348 for specific cost to your destination.

Window Drainage Plane Specifications

A 0.024" (0.6 mm) thick high-impact polystyrene strip formed with .120" (3 mm) deep corrugations, bent into L-shape, 5" (127 mm) wide by 9" (229 mm) high, to fit on top of sub-sill region of a window rough opening prior to window installation to facilitate drainage.