Blanke TRIBOARD Corner Joint Tape — Decouple the Floor From the Walls

An impact-sound floor is only as quiet as its perimeter. Where the floor meets the walls, any bedding mortar that touches the wall creates a rigid sound bridge — a direct path for footfall noise into the structure that quietly undoes the reduction the TRIBOARD board provides. TRIBOARD Corner Joint Tape closes that path around the entire room.

It's a wide 3-15/16" tape that wraps the floor-to-wall transition and corner areas, keeping the uncoupling and impact-sound layer continuous right up to the perimeter and blocking mortar from bridging to the wall. It's embedded in the tile adhesive as you install, so it locks into the assembly rather than sitting loose, and a 49.2 ft roll covers the perimeter of a typical room.

Run it along the straight walls, tie it into the pre-formed corners at inside and outside corners, and seal the field seams with the self-adhesive joint tape — the full accessory set that makes the TRIBOARD board perform to its 17 dB rating.

Why Tile Pros Choose It

• Decouples the perimeter: Wraps the floor-to-wall transition
• Blocks sound bridges: Keeps bedding mortar off the walls
• Wide 3-15/16": Enough width to wrap the change of plane
• Embedded in adhesive: Locks into the assembly
• 49.2 ft roll: Covers a typical room's perimeter
• Ties into the corners: Continuous wrap with the pre-formed corner pieces
• Where the quiet floor keeps its quiet: The edges decide it

Pro tip: Turn the tape up the wall slightly at the perimeter and keep bedding mortar from spanning between the floor field and the wall — that clean separation at the edge is what preserves the impact-sound rating across the whole floor.