Better Window Installations. Improved Water Drainage.

Foam Stop is an innovative new product for window installations. When it comes to stopping spray foam to maintain a drainage plane, nothing is easier and more sure than Foam Stop. Reduce water intrusion damage and give your windows a chance to breathe. Foam Stop is fast, easy-to-use, and affordable. Scroll down to learn more. 

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  • Prevents spray foam from reaching the nailing flange
  • Helps to maintain a free draining cavity at the perimeter of the window assembly
  • Easy to install
  • Cost effective
  • Purchase direct
  • Limited warranty


After flashing the window opening, install T-Stop! Installing T-Stop is easy: simply trim to fit and fasten in place. Watch the installation video for more detailed information. 


  • Sold in 8.5' lengths
  • Flexible plastic with patented design
  • Install with simple fasteners such as staples