Site Preparation

1. Check the Concrete Floor and Surface Level

Before installation, ensure the concrete floor is properly prepared, firm, clean, dry, and level according to Holzer Floor’s installation requirements.

● Check the floor level across the entire installation area.

● Repair uneven areas and remove loose material, dust, debris, and other surface contaminants before installation.

● Holzer Floor can be installed over existing tiles, provided the tiles are firmly bonded, stable, clean, dry, and sufficiently level.

● Repair loose, cracked, or hollow-sounding tiles and address uneven grout lines where necessary before installation.

Important The integrated underlay is designed to provide an underlay layer beneath the flooring. It cannot correct uneven concrete, level the floor, or compensate for significant surface defects. The subfloor must be properly prepared before installation.

2. Inspect for Water Leakage and Moisture

Before installation, inspect the site for potential water leakage and moisture-related risks. This step is highly recommended, particularly in areas exposed to rainwater, plumbing leaks, or moisture penetration.

Pay particular attention to:

• Wall corners and external walls exposed to heavy rain.

• Bathrooms, toilets, and adjacent areas where water leakage may occur.

• Sliding doors, windows, and balcony entrances where rainwater may enter.

• Plumbing connections, concealed pipes, and other potential leakage points.

• Concrete floors that may retain moisture.

Recommended procedure:

1. Visually inspect the site for water stains, damp patches, cracks, and signs of previous leakage.

2. Use a suitable moisture meter to check the concrete floor and other relevant areas before installation.

3. Investigate any unusually high moisture readings and identify the source before proceeding.

4. Complete the necessary waterproofing and repair work in high-risk areas, including wall corners, external walls, wet areas, and door or window junctions.

5. Allow repaired and waterproofed areas to dry or cure fully, as required by the relevant product specifications.

6. Confirm that the site meets the applicable moisture requirements before installation.


Important: Waterproofing must address the actual source and path of water entry. A moisture meter reading alone does not confirm that an area is waterproof. Do not install flooring over an unresolved leak or a subfloor with moisture levels outside the permitted limits.

3. Complete Cabinets and Other Construction Work First

Holzer Floor is factory-finished. To minimise scratches, impact damage, stains, and unnecessary repair work, we highly recommend installing the flooring as late as practical in the construction process.

Where the project design allows, complete the following work first:

• Ceiling and overhead work.

• Wall painting and finishing.

• Cabinetry, built-in wardrobes, and fixed furniture.

• Other heavy construction and finishing work.

Install Holzer Floor after these activities have been completed and the site has been cleaned.

Recommended approach: Install the wood flooring as one of the final finishing stages to reduce the risk of damage caused by cabinet installation, painting, tools, ladders, and other trades.

If the project requires flooring to be installed before certain cabinets or fixed items, confirm the flooring layout, installation details, and relevant expansion requirements with the project team before work begins.

After installation, protect the finished floor appropriately if other trades must return to the site. Use clean, non-abrasive protective materials and avoid dragging heavy objects across the surface.

4. No Additional Underlay or Wooden Substructure Required

Holzer Floor Engineered Natural Oak Flooring features an integrated underlay supplied as part of the flooring construction.

• No separate underlay is normally required beneath the flooring.

• No additional wooden substructure is normally required for installation on a suitable, properly prepared subfloor.

• The flooring is designed to be installed over an appropriate prepared concrete floor or a suitable existing tiled surface.

Important: The integrated underlay does not level the subfloor or correct unevenness. Do not use additional underlay or a wooden substructure to compensate for an uneven surface unless the installation design has been specifically reviewed and approved.

Always follow the applicable Holzer Floor installation instructions and confirm that the proposed subfloor is suitable before installation.

5. Repair: Individual Planks Can Be Replaced

One advantage of a plank flooring system is that a damaged individual plank does not necessarily mean replacing the entire floor.

If one or a few pieces are seriously damaged, the affected plank can be removed and replaced by a trained installer.

Typical replacement process: 

1. Identify the damaged plank.

2. Cut the plank carefully through the centre.

3. Remove the damaged sections without damaging the surrounding floor.

4. Clean the area and remove remaining material.

5. Prepare the replacement plank.

6. Remove the required tongue from the replacement piece where necessary.

7. Apply the appropriate flooring adhesive to the back.

8. Position the new piece carefully into the opening.

9. Allow the adhesive to cure according to the adhesive manufacturer’s instructions.

Important Plank replacement should be carried out by a qualified or experienced flooring installer, particularly when the floor has already been installed and surrounding planks must be protected.