Parquet flooring is one of the most timeless and elegant flooring options available. Its distinctive geometric patterns and natural timber finish add warmth, character, and value to any home. However, installing parquet flooring over a concrete subfloor requires careful preparation and attention to detail. Skipping important steps can lead to moisture problems, lifting, warping, or an uneven finish.
This parquet flooring installation guide explains each stage of the process, helping you achieve a durable and professional-looking result.
Step 1: Test the Concrete for Moisture
Before installing any timber flooring, it’s essential to check the moisture content of the concrete slab. Concrete naturally retains moisture, and excessive moisture can cause parquet blocks to swell, warp, or lose adhesion over time.
How to test the slab
- Tape a one-metre square sheet of clear plastic to the concrete and leave it in place for 24 to 48 hours. If condensation forms underneath, the slab contains too much moisture.
- For greater accuracy, use a calcium chloride moisture test or a concrete moisture meter.
- Most flooring manufacturers recommend readings below 75% relative humidity (RH) or approximately 5.5% moisture content, depending on the testing method.
If moisture levels are too high, allow the slab to dry further or apply an approved moisture barrier before continuing.
Ignoring moisture is one of the most common causes of parquet flooring failure, making this the most important step in any parquet flooring installation guide.
Step 2: Prepare the Concrete Subfloor
A successful installation starts with a clean, level, and structurally sound subfloor.
Before laying any timber, ensure that:
- The surface is level, with no more than 3 mm variation over a 2-metre span.
- High spots are ground down using a concrete grinder.
- Low areas, cracks, and imperfections are filled with a suitable levelling compound.
- Dust, dirt, paint, grease, and old adhesive residues are completely removed.
- Newly poured concrete has cured for at least 60 to 90 days, depending on site conditions.
Even the highest-quality parquet flooring cannot compensate for a poorly prepared subfloor.
Step 3: Apply a Moisture Barrier
Even if your moisture tests meet the recommended limits, applying a moisture barrier provides valuable long-term protection.
Common options include:
- Liquid-applied epoxy or polyurethane moisture barriers rolled directly onto the concrete.
- Sheet membrane systems installed over the slab before laying the flooring.
- Premium timber flooring adhesives that also function as moisture barriers.
Always follow the flooring and adhesive manufacturer’s recommendations. Many warranties require an approved moisture barrier, even when the slab appears dry.
Every professional parquet flooring installation guide recommends this extra layer of protection.
Step 4: Acclimatise the Timber
Timber naturally expands and contracts as temperature and humidity change. Allowing the parquet blocks to acclimatise helps minimise movement after installation.
For best results:
- Unpack the timber and spread it throughout the room.
- Leave it for at least 48 to 72 hours before installation.
- Maintain normal indoor living conditions during this period.
- Avoid storing the flooring in garages, sheds, or other areas with fluctuating temperatures.
This simple step helps prevent gaps, cupping, and buckling after installation.
Step 5: Plan the Layout
Unlike standard timber planks, parquet flooring relies on precise geometric patterns that require careful planning.
Before applying adhesive:
- Find the centre of the room by marking intersecting lines between opposite walls.
- Dry-lay a section of the pattern to confirm the layout.
- Adjust the starting point if necessary to avoid narrow cuts around walls.
- Position herringbone or chevron patterns along the longest dimension of the room where possible.
Taking time to plan the layout ensures a balanced, professional finish.
Step 6: Install the Parquet Flooring
Once the preparation is complete, installation can begin.
Follow these steps:
- Use a high-quality flexible timber flooring adhesive suitable for concrete subfloors.
- Apply the adhesive with a notched trowel in manageable sections.
- Work from the centre lines outward, pressing each parquet block firmly into place.
- Leave an expansion gap of 10–15 mm around the perimeter using spacers.
- Regularly check alignment, as even minor errors become more noticeable as the pattern progresses.
- Wipe away excess adhesive immediately before it hardens.
- Allow the adhesive to cure fully, usually 12 to 48 hours, before walking on the floor.
Although parquet installation takes longer than standard plank flooring, the finished result is well worth the extra care.
Step 7: Sand and Finish the Floor
Once the adhesive has fully cured, sanding and finishing complete the installation.
The finishing process typically involves:
- Sanding with coarse-grit paper to level the surface.
- Progressively sanding with medium and fine grits to achieve a smooth finish.
- Vacuuming thoroughly between sanding stages to remove dust.
- Applying your preferred finish, such as polyurethane, hardwax oil, or lacquer.
- Applying at least three coats, lightly sanding between coats where recommended.
- Allowing each coat to dry fully before applying the next.
The finishing process highlights the natural grain of the timber while protecting the floor against daily wear and tear.
When Should You Hire a Professional?
Installing parquet flooring over concrete is achievable for experienced DIY renovators, but it requires precision, patience, and specialised equipment.
Professional installation is recommended if:
- You’re installing premium or custom-made parquet.
- The project involves a large area.
- The concrete slab requires extensive preparation.
- You’re installing complex patterns such as Versailles, herringbone, or chevron.
A professional installer can identify potential issues before they become expensive problems and ensure the finished floor performs beautifully for decades.
Final Thoughts
Installing parquet flooring over a concrete subfloor requires careful planning, but the results are well worth the effort. By testing for moisture, preparing the slab correctly, applying an effective moisture barrier, acclimatising the timber, planning the layout, and taking your time during installation, you’ll achieve a floor that’s both beautiful and long-lasting.
This parquet flooring installation guide covers the essential steps, but every project is different. Always follow the recommendations provided by your flooring and adhesive manufacturers to ensure the best possible outcome.
With the right preparation and attention to detail, your parquet floor will become a stunning feature that adds warmth, style, and value to your home for many years to come.
About Australian Parquet Industries
Australian Parquet Industries, part of the Thrust Floors Group, has been designing, manufacturing, installing, and restoring premium parquet and timber flooring across Sydney for more than 53 years. We specialise in custom-made parquet flooring, traditional and contemporary patterns, premium hardwood timbers, floor repairs, sanding, and finishing.
If you’re looking for more than a general parquet flooring installation guide, our experienced team can assess your concrete subfloor, recommend the most suitable preparation methods, and professionally install a parquet floor that’s built to perform beautifully for decades.
