What preparations are needed before installing PU moldings on unfinished walls?

What preparations are needed before installing PU moldings on unfinished walls?

Before installing PU mouldings on an unfinished (bare) wall, the surface should be properly prepared to ensure good adhesion and a clean final result. Key preparation steps include:

1. Surface cleaning

Remove dust, loose particles, oil stains, and construction debris. The wall must be clean and dry.

2. Wall leveling

Check the flatness of the wall. Uneven areas, holes, or cracks should be repaired with putty or cement-based filler and sanded smooth.

3. Moisture check

Ensure the wall is completely dry. PU mouldings should not be installed on damp walls, as moisture can affect adhesion.

4. Primer application

Apply a suitable wall primer or sealing coat to strengthen the surface, reduce dust, and improve bonding performance.

5. Marking and positioning

Measure and mark installation lines in advance to ensure accurate alignment of the PU mouldings.

6. Adhesive compatibility check

Make sure the wall surface is compatible with the PU adhesive recommended by the manufacturer.

Proper wall preparation helps ensure strong adhesion, precise installation, and long-term durability of PU mouldings.