• If the floor is textured, cracked, or uneven, and the home has a raised threshold, use the threshold to help seal the dam.

• Apply a double layer of weather stripping along the inside bottom edge of the dam:

  • First strip runs along the edge where it contacts the floor.

  • Second strip is placed on top, slightly overlapping where the vertical weather stripping will meet.

• Install vertical weather stripping on the inside wall where the dam touches the structure:

  • Align flush with the top of the dam.

  • Extend downward to meet the inner edge of the bottom strip.

• Ensure the bottom and vertical strips overlap to create a watertight seal.

• For tri-fold dams, place weather stripping between connecting panels:

  • Align with the wall.

  • Allow it to expand outward and connect with the top and bottom seals for a continuous barrier.

Using Parting Bead

• Textured flooring under the door sill may cause an uneven surface, preventing a tight seal.
• Use a thin piece of wood (parting bead) to level the surface with the exterior wall.
• Cut the parting bead 1/8 inch shorter than the indentation length.
• Fill the remaining gap with weather stripping raised no more than 1/8 inch.
• The raised weather stripping provides a firm surface for the dam’s bottom seal.