Installing hardwood flooring is one of the most rewarding upgrades a homeowner can make. The warmth, character, and durability that hardwood flooring brings to a space is difficult to replicate with any other material. But the process of getting from bare subfloor to finished room involves more steps than most people anticipate, and understanding what those steps look like before the work begins makes the entire experience smoother, less stressful, and more likely to produce results you will be satisfied with for years.
This hardwood floor installation guide walks through the full hardwood flooring installation process, from the preparation stage through to the finishing touches, so you know exactly what to expect at every point along the way.
Types of Hardwood: Options Available. Know This Before Installation
Before installation, the right type of hardwood flooring needs to be selected for the space. This decision affects not only the look of the finished floor but also the installation method used and how the floor will perform over time.
Solid hardwood is milled from a single piece of wood and can be sanded and refinished multiple times over its lifespan. It is best suited to above-grade installations and performs well in living rooms, dining rooms, and bedrooms where humidity levels remain relatively stable.
Engineered hardwood consists of a real wood veneer bonded over multiple layers of plywood or high-density fibreboard. This construction gives it greater dimensional stability, making it a practical choice for spaces with fluctuating humidity or installations over concrete subfloors, including basements.
The species of wood, the plank width, the finish, and the surface texture all influence both the visual outcome and the installation requirements. Wider planks, for example, require more precise subfloor preparation to prevent movement and squeaking after installation. Visiting our hardwood flooring store in Scarborough before making a final selection allows you to compare species, finishes, and plank widths in person, which makes the decision considerably easier.
How To Go About Subfloor Preparation Before Installation
Subfloor preparation for hardwood flooring is the foundation of a successful installation. This stage is often the most time-consuming part of the process, but it is also the most important. Cutting corners here is one of the leading causes of problems that surface after installation is complete.
The subfloor must be structurally sound, clean, dry, and level. Most hardwood manufacturers specify a maximum variation in levelness, typically no more than 3mm over a 1.8 metre span. Any high spots need to be sanded down, and any low spots need to be filled with a levelling compound and allowed to cure fully before installation begins.
Moisture is the single biggest threat to hardwood flooring. Before installation, moisture readings are taken from both the subfloor and the hardwood itself. If the subfloor contains excessive moisture, it must be addressed before any wood goes down. In concrete subfloor situations, a moisture barrier is typically installed as an additional layer of protection.
The subfloor is also checked for squeaks, loose boards, and protruding fasteners, all of which need to be corrected before the hardwood floor installation begins.
Acclimatization Before Hardwood Flooring
Knowing how to prepare for hardwood floor installation goes beyond clearing the room and moving furniture. Wood is a natural material that responds to its environment, and before installation, hardwood flooring needs to acclimatise to the conditions of the space where it will be installed.
This means the flooring is brought into the room and allowed to sit, still in its packaging or loosely stacked, for a period that typically ranges from three to five days depending on the product and the manufacturer’s recommendations.
During this time, the wood adjusts to the temperature and humidity of the space. If hardwood is installed before it has had a chance to acclimatise, it may expand or contract after installation, leading to gaps between planks, buckling, or cupping.
The room should be at its normal living temperature and humidity during the acclimatisation period. Running the heating or air conditioning system ahead of installation helps establish the conditions the floor will live in permanently.
Hardwood Flooring Installation Methods
There are three primary methods used to install hardwood flooring, and the right one depends on the type of hardwood chosen and the nature of the subfloor beneath it.
Nail or staple down is the traditional method used for solid hardwood installation over a wooden subfloor. A flooring nailer or stapler drives fasteners through the tongue of each plank at an angle, securing it to the subfloor below.
Glue down installation is used when hardwood is being installed directly over a concrete subfloor. A flooring adhesive is spread over the subfloor using a trowel, and the planks are pressed into it.
Floating hardwood floor installation is the most common method used for engineered hardwood. The planks are not attached to the subfloor at all. Instead, they are connected to each other using a click-lock or tongue-and-groove system and float as a single connected layer over an underlayment.
Hardwood Flooring Installation Process
Once the subfloor is prepared and the hardwood has acclimatised, hardwood flooring installation begins. The room is measured and a starting line is established, typically along the longest wall or the most visually prominent wall in the space.
Planks are laid row by row, with each row staggered relative to the previous one to distribute the end joints and create a natural, random appearance.
Expansion gaps are left around the perimeter of the room where the flooring meets the walls. Hardwood expands and contracts with seasonal changes in humidity, and without this gap, the floor has nowhere to move.
Doorways, vents, and transitions to other flooring types require specific attention. Transition strips are used where hardwood meets tile, carpet, or another flooring surface, and threshold pieces are fitted at doorways to create a clean, finished edge.
Sanding and Finishing: Unfinished Hardwood
If unfinished hardwood has been installed, the floor needs to be sanded and finished on site after installation is complete. Hardwood floor finishing is a multi-stage process that begins with coarse sanding to level the surface and remove any minor height variations between planks.
After sanding, the floor is cleaned thoroughly to remove all dust before the finish is applied. Stain can be applied at this stage if a specific colour tone is desired.
Once the stain has dried, multiple coats of finish are applied, typically a hardwearing polyurethane or oil-based product, with light sanding between coats to ensure proper adhesion.
Prefinished hardwood, which arrives with the finish already applied at the factory, skips the on-site sanding and finishing stage entirely.
Hardwood Flooring: Post-Installation Care
Once hardwood flooring installation is complete and the floor is ready for use, a few simple habits go a long way toward protecting the investment.
Felt pads should be placed under the legs of all furniture to prevent scratching. Area rugs are recommended in high-traffic zones and at entryways where dirt and grit are most likely to be tracked in.
Hardwood floors should be swept or vacuumed regularly using a soft-bristle attachment, as fine particles act like sandpaper under foot traffic over time.
Maintaining consistent indoor humidity levels, generally between 35 and 55 percent, helps prevent seasonal movement that can cause gaps or surface changes in the wood.
Common Hardwood Flooring Installation Mistakes to Avoid
Even well-intentioned projects can run into problems when certain steps are overlooked. Skipping the acclimatisation period is one of the most frequent mistakes.
Installing over a subfloor that has not been properly levelled or tested for moisture is another common issue that tends to reveal itself only after the floor has been down for several weeks.
Forgetting to leave expansion gaps around the perimeter is a mistake that can cause the floor to buckle during warmer months when the wood expands.
Working with an experienced flooring professional reduces the likelihood of these errors significantly.
A good flooring store will also be able to point you toward the right products and materials for your specific subfloor type and installation method before the project begins.
Conclusion
Hardwood flooring installation is a process that rewards careful planning and precise execution at every stage. From selecting the right product for your space to allowing proper acclimatisation, preparing the subfloor correctly, and applying the right installation method, each step builds on the one before it.
Understanding the process before work begins puts homeowners in a better position to ask the right questions, set realistic expectations, and make decisions that serve them well over the long term. A well-installed hardwood floor, properly maintained, can last for decades and remain one of the most valued features of a home throughout its life.