Step 1: Thin-set Application
Apply unmodified thin-set mortar to the internal corner using a 1/4" x 3/16" V-notched trowel. Ensure full coverage on both meeting walls.
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Eliminate the #1 cause of shower leaks: structural joint failure. Our pre-formed polyethylene inside corners provide a seamless, permanent barrier for high-stress intersections.
Unlike manual folding which creates bulk and stress points, our pre-formed waterproof corners utilize an injection-molded thermo-bonding process.
| Feature | Manual Mesh Folding | Mondeway Pre-formed |
|---|---|---|
| Waterproof Integrity | ✘ Risk of pinholes | ✔ 100% Monolithic |
| Installation Speed | Slow (8-10 mins/corner) | Fast (< 1 min/corner) |
| Thickness Consistency | Uneven (Builds up mortar) | Ultra-thin (Seamless tile fit) |
| Longevity | High fatigue failure | Decades of elasticity |
Permeability Rating
Elongation at Break
Warranty Life
Apply unmodified thin-set mortar to the internal corner using a 1/4" x 3/16" V-notched trowel. Ensure full coverage on both meeting walls.
Press the Mondeway Inside Corner firmly into the mortar. Use the flat side of the trowel to bleed out air bubbles from the center outwards.
Ensure the waterproof membrane overlaps the corner flange by at least 2 inches to maintain a continuous seal.
Yes. While designed for sheet membranes, our fleece-backed polyethylene is compatible with most high-quality liquid-applied waterproofing, providing a reinforced core that prevents cracking at the joints.
Cutting and overlapping sheet membrane in a 3-way corner creates significant thickness. This "hump" makes it difficult to set tiles flat. Pre-formed corners are thermo-pressed to be ultra-thin without losing strength.
We recommend an unmodified thin-set mortar for bonding the membrane to the corner. However, always follow the specific local building codes and the adhesive manufacturer’s instructions for wet-area substrates.
Polyethylene is highly stable. Our corners remain flexible from -20°C to +90°C, ensuring they don't become brittle in unheated construction sites or soften in steam room applications.
When stored away from direct UV light and extreme heat, the product has an indefinite shelf life. Once installed, it is designed to last the lifetime of the tile installation.
Absolutely. With a Perm rating of <0.1, they act as a Class I vapor retarder, which is essential for the high-pressure moisture environment of a residential or commercial steam room.
We recommend maintaining the full flange for maximum bond area. If trimming is necessary, ensure at least a 2-inch overlap with the connecting waterproof membrane to maintain system integrity.
Yes, we provide a full system including Inside Corners, Outside Corners, and Pipe Seals to ensure every vulnerability in the wet room is covered.