Schluter Ditra Uncoupling Membrane (54 sq ft) Review (2026)
By The DIYPicks Team · Updated July 2026
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- Crack isolation
- Waterproofing
- Bathroom floor
The gold-standard crack-isolation and waterproofing layer for tile over plywood or a cracked slab. It solves movement problems backer board can't, but it costs more and assumes your subfloor is already stiff enough.
Pros
- Uncouples tile from the subfloor so seasonal movement and hairline slab cracks don't telegraph up and crack the tile
- Doubles as a waterproofing layer when seams are sealed with Kerdi-Band, ideal over plywood in a bathroom
- Only 1/8 in thick, adding almost no height so it barely raises the floor at doorways and transitions
Cons
- Far pricier than backer board at roughly $2.30/sq ft before the extra thinset it needs above and below
- Requires the correct thinset under it (modified for plywood, unmodified over the fleece) or the bond fails
- Provides zero structural stiffness, the subfloor must already meet L/360 deflection or tiles will still crack
Specifications
| Type | Polyethylene uncoupling membrane |
|---|---|
| Base | Concrete / plywood / OSB |
| Thickness | 1/8 in (3.5 mm) |
| Coverage | 54 sq ft per roll |
| Cure | Set thinset over it immediately |