Do I need underlayment for hardwood flooring?

Author: Juanita Kling III  |  Last update: Wednesday, June 29, 2022

While underlayment isn't always necessary for your hardwood floors, there are always benefits to it. One of the most significant reasons to install underlayment is the added stability and durability. Underlayment provides support for your floor and helps smooth subfloor imperfections.

What is the recommended underlayment for hardwood flooring?

What Underlayment is Best for Wood? When installing hardwood or engineered wood flooring, the best underlay options are cork and foam. However, foam does have more give than cork so, while it is the more popular option, we recommend cork. Cork has less give, making it less likely to flex underneath your planks.

Is underlayment necessary?

Underlayment is not optional. If your laminate planks don't have it already attached, we recommend that you buy rolls of underlayment on which to install your laminate floor.

What happens if you dont use underlayment?

If the subfloor in your home or property is uneven, then your laminate floor could move and shift if it doesn't have an underlayment for support. As a result, the floor will be more prone to wear-and-tear and could even warp. The more stability, the less likely you'll have to pay out of pocket for costly repairs.

What flooring does not require underlayment?

If you're laying the LVP over an existing cushion-backed vinyl floor or a below-grade tile floor, then you won't need to use an underlayment. However, you'll want to use one in every other application including covering existing hardwood floors, vinyl flooring that isn't cushioned, and concrete floors.

Choosing the Best Underlay For Laminate & Wood Flooring

What is the difference between subfloor and underlayment?

Basically, subfloors are a structural part of your home that provide strength and rigidity to your home's flooring. Underlays, on the other hand, protect your floor covering from moisture, help soundproof your floor, and offer cushioning and comfort underfoot.

Can I use roofing felt under hardwood flooring?

Roofing paper should not be used under hardwood flooring. Due to its bituminous materials, it could begin to exude an unpleasant odor and even be toxic for your family. Instead, rosin or felt underlayment paper is appropriate.

What are the requirements for underlayment?

Underlayment Requirements
  • be structurally sound.
  • be designed for resilient flooring underlayment purposes.
  • be a minimum thickness of 1/4"
  • have panels smooth enough so that texture or graining will not show through finished flooring.
  • resist dents and punctures from concentrated loads.

What roofing underlayment should I use?

Synthetic Underlayment

This is currently the most popular choice for roof underlayment, and with good reason. Made with an asphalt-saturated basemat and fortified with a mix of fiberglass, this product is not only extremely water-resistant, much stronger and more resistant to tears than other types of underlayment.

Is roofing felt necessary?

Answer: Roofing felt is a layer of tar paper installed beneath the shingles to provide a backup waterproof membrane in case of leakage. Felt, otherwise known as underpayment, is required when asphalt shingles are installed as a first layer of roofing or when they are applied over wood shingles or a built-up roof.

How do you install underlay on hardwood floors?

First, roll out a piece of underlay and push it up to the wall. Make sure you install the underlay in the same direction as you're planning on installing the floor. Put a box of planks on it to hold that end in place before rolling out the rest in the other direction. Then, cut it off at the nearest perforated edge.

What goes between subfloor and hardwood?

Underlayment is the layer of material that sits between the subfloor and the new hardwood flooring. Subflooring is a layer of plywood or engineered wood that sits at the very bottom layer of the flooring.

How close should you nail hardwood flooring?

The nail spacing schedule varies by board type but you always nail down the ends of each board and space nails between 6, 8, or 10 inches apart. Always read and follow the flooring manufacturers guide and recommendations. We've now reached the final few rows that are too close to the wall for a Powernailer.

Why do you put wax paper under hardwood?

The wax paper provides a professional grade thickness and performance to help ease the installation and reduce squeaks in wood floors. The wax paper is simply placed between the subfloor and the wood flooring on above grade installations.

What is the purpose of flooring underlayment?

Flooring Underlayment

The thin layer of material helps cushion, sound absorption, insulation and reduce wear with your flooring. For laminate or engineered wood flooring, it provides a “vapor barrier” to prevent moisture from coming through and damaging your floor.

What wood should I use for subfloor?

Plywood has been a standard subfloor material since the 1950s and remains the preferred subflooring for many builders. Standard plywood can be used for subfloors, but a better material is 3/4-inch tongue-and-groove plywood subflooring.

Do you nail the tongue or groove?

The groove of the plank should face the wall and the tongue should face outward. This makes the tongue accessible for nailing, but not the groove.

How often should you staple hardwood floors?

We recommend nailing or stapling every 6-8 inches along the tongue of every board, staying in approx. 4 inches from each end of the floorboard. As a rule of thumb, the recommended sizes below apply.

Where do you start when installing hardwood floors?

The goal is to make the boards start about 1/2″ from the exterior wall on both the back side and edge. Since the wall was out of square, this varied as much as 1/2″ along the perimeter. In every hardwood installation, you should leave 1/2″ expansion joints between the flooring surface and the exterior wall.

Do I need a moisture barrier under hardwood floors?

Do I need a vapor barrier for hardwood floors?" The answer is YES! Moisture can destroy hardwood flooring. It causes cupping, warping, and even mildew if not treated. You must install a moisture barrier to protect your flooring from water wicking up from below.

Can you put wood floor over hardwood?

Yes, you can install over an existing wood floor, provided it meets some important conditions. First, make sure doing so won't create problems with height differences at areas such as transitions with other rooms and stairs.

How do you prepare a subfloor for hardwood floors?

Thoroughly vacuum the existing floor, and use a long floor leveler and tape measure to ensure the subfloor is level within 3/16 inch for every 10 feet. You'll need to know how to level a floor: Just sand any high spots and fill the low spots with leveling compound.

Do I need a damp proof membrane on floorboards?

When installing wood flooring, solid or engineered, on a concrete base the use of a damp proof membrane is always recommended. No matter how dry your floor feels it will always contain damp, which can be drawn to the wood if not treated causing cupping, lifting and general damage to the floor.

Is wood Fibre underlay good?

If you're looking for an alternative to foam underlay, fibreboard is an excellent option, which is good at both deadening sound in high traffic rooms and adding insulation. This underlay is also an eco choice, as it's made from 100% wood fibre that's sustainable and recyclable, and constructed without glue or resin.

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