Window Drainage Plane™

Sub Sill Drainage

WDP 5000
Product made with a minimum 94% post industrial recycled plastic Made with a minimum 94% Post-Industrial Recycled Plastic

Window Drainage Plane™ Installation

  • 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

Ordering & Shipping

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.

Product Number
WDP 5000
Piece Length (Feet)
Pieces per Bundle
Linear Feet per Bundle
Bundles per Box
Linear Feet per Box
Boxes per Pallet
Linear Feet/Units per Pallet
Pallet Size

Documents, Specs, Details & More

L & R Weep Screed™

 LR 3501 

Sure Cavity®

 SC 5016, SC 5032