Float, Glue, or Nail? How to Choose the Right Hardwood Install Method
The method matters as much as the material. Here is how to know which one fits your home.
Prefer to read? The full breakdown is below, same points in the same order.
Why the install method is not a minor detail
Most homeowners spend weeks choosing the right wood. They spend almost no time thinking about how it goes down. That is backwards.
The same hardwood floor installed three different ways will feel different, sound different, and last a different number of years. The install method is chosen based on your subfloor type, your moisture conditions, and what the product itself allows. Get it wrong and even the best floor underperforms. Get it right and the floor earns every dollar you spent on it.
Here is what each method involves, when it works, and when it does not, in the same order Andre covers it in the video.
The three methods
Same Points as the Video
Reference this any time you want to revisit what Andre covered. Share it with whoever else is part of the decision.
1
Floating: Flexible, Fast, and Right for More Homes Than You Think
A floating floor does not attach to the subfloor. The planks click together and rest on top of an underlayment layer. The whole floor moves as one unit, expanding and contracting with temperature and humidity changes without being restrained by fasteners or adhesive.
This method works well over concrete slabs, over existing tile or vinyl, over radiant heat systems, and in homes where the subfloor has minor irregularities that would be costly to correct. It is also the fastest method to install, which matters when you are living in the home during the project.
The trade-off is feel. A floating floor has a slight give underfoot that glue-down and nail-down do not. In rooms with hollow subfloor cavities or over crawlspaces, sound can telegraph more than with bonded methods. The right underlayment reduces this significantly but does not eliminate it entirely.
Floating is not the budget option. It is the right option for a specific set of conditions. We use it regularly on engineered hardwood over concrete and on full-home installs where consistent performance across different subfloor types matters.
2
Glue-Down: The Quietest, Most Solid Feel Available
Glue-down uses a urethane adhesive spread across the subfloor. Each plank bonds directly to the surface below, with no air gap between the wood and the subfloor. The result is the most solid feel of any install method. No bounce, no flex, minimal sound transmission.
It is also the best moisture barrier available for concrete slab installations. The adhesive itself seals against ground moisture that would otherwise work its way up through the slab and into the wood. In Bay Area homes built on slab, this matters year-round.
The requirements are demanding. The subfloor must be flat, clean, and free of any contamination that would prevent adhesion. The adhesive must be the right type for the product and spread at the correct thickness. Cure time must be respected before foot traffic. Skipping any of these steps creates voids under the floor that are worse than no glue at all.
When glue-down is done correctly, it is the best performing install method for feel and longevity. It is also the most unforgiving if the prep is skipped. We do not recommend glue-down unless we are confident the subfloor is ready for it.
3
Nail-Down: The Classic Method for Solid Hardwood on Wood Subfloors
Nail-down uses a pneumatic nailer to fasten each plank through the tongue into a wood subfloor. It is the standard method for solid hardwood and has been for decades. The planks are mechanically fastened but still have slight room to move with seasonal changes, which is exactly what solid wood needs.
It is cost-effective, time-tested, and produces a feel that is solid and traditional. Because the nails go through the tongue rather than the face of the plank, they are invisible once the next plank clicks into place.
The hard limit is the subfloor. Nail-down requires a wood subfloor of adequate thickness, typically 3/4 inch plywood or equivalent. It cannot be used over concrete. It also requires checking that the subfloor is tight and structurally sound before the first nail goes in, because a nail into a loose panel creates movement that gets worse over time.
Nail-down is the right choice for solid hardwood on plywood subfloors. It is not a substitute for glue-down on concrete, and it is not appropriate for engineered products that require floating or glue. Matching the method to the product and the subfloor is non-negotiable.
"The best floor in the world, installed the wrong way, performs like a cheap one."
Redeemed Flooring | Concord, CA | In Bay Area homes since 1999
How to know which method is right for your home
Three questions determine the answer. What is your subfloor made of, concrete slab or wood? What is the moisture situation in that part of the home? And what does the specific product you are choosing actually allow?
Concrete slab points toward glue-down or floating. Wood subfloor opens all three options, with nail-down as the standard for solid hardwood and floating or glue as options for engineered. High moisture points toward glue-down with a moisture barrier or floating with the right underlayment. The product spec sheet will list which methods are approved, and that list is not a suggestion.
If you watched the video and want to walk through which method makes sense for your specific home and product, the in-home estimate covers exactly this. We look at your subfloor, check for moisture, and match the method to what you are actually working with.
Not sure which method fits your home?
We look at your subfloor, check moisture conditions, and tell you exactly which install method your home and your floor actually need.
