If your planks already have a pad-attached underlayment, you most likely won't need an underlayment. However, if your flooring manufacturers installation instructions allow for an extra underlayment, adding an extra underlayment will provide improved sound reduction, insulation, and moisture protection.
Glue down vinyl plank flooring will not need an underlayment. You will install these planks by gluing them directly on top of the subfloor. It is very important to have a debris free and level subfloor for a glue down vinyl flooring installation!
Engineered vinyl plank (EVP) flooring (also known as rigid core luxury vinyl flooring) can be made with three different cores: stone-plastic composite (SPC), wood-plastic composite (WPC), and pure vinyl. SPC floors aren't as comfortable, so they pair best with soft underlayments made from foam, felt, and cork.
Luxury vinyl plank manufacturers mention only vapor barrier in their installations. They recommend this due to not allowing (concrete subfloor) getting moisture or alkalinity to your flooring choice. This will eliminate any potential for claims or damages to the manufacturers flooring.
In short, vinyl flooring itself can be completely self sustainable and does not require an underlayment to function properly. Another reason underlayments may be suggested for vinyl flooring is if the vinyl flooring type is thin. When the vinyl flooring is thin, it becomes a lot easier to flex and bend.
Vapor barriers should fully cover any ground and overlap at least 6”. Create a conditioned crawl space. Conditioned crawl spaces can prevent vapor drive and moisture build up and provide the added benefit of increased energy efficiency while still capturing the cost savings of building over a crawl space.
How to lay vinyl flooring on concrete. As you don't have to install underlay for Vinyl Flooring or LVT, this can go directly onto the concrete subfloor. However, allow 24 hours for your flooring to acclimatise by leaving it out of its packaging.
Concrete Subfloor
For floating floors, like loose-lay vinyl sheet or rigid vinyl planks, a vinyl flooring underlayment may be required as a vapor barrier and can also add much-needed cushion and warmth underfoot. You may also want to look for an underlayment designed for moisture mitigation and insulation.
You can install vinyl on many types of subfloor, including concrete and wood. But that floor must be flat for your installation to be a success. An uneven subfloor can lead to potential problems, such as planks having varying heights that will make the flooring unstable and wear down more quickly.
No. Rigid vinyl planks like Sound-Tec, Studio 12, and Foundations float over minor subfloor imperfections. They mask slight subfloor unevenness. However, because of the precisely milled clip system, a flat substrate is recommended for support.
Since vinyl planks are generally thinner than a laminate, the underlayment is also thinner. If too much cushion is beneath the vinyl planks, the locking system and joint integrity will be compromised. Most vinyl underlayments are 1mm to 1.5mm thick.
Unfortunately, adding insulating underlayment under vinyl flooring will cause the flooring to be unstable. Because vinyl flooring isn't made from wood products, it does not have the same structure that laminate flooring does.
When you're installing a vinyl plank floor or any rigid type of new flooring, it's important for the underlying layer to be both level and flat. If you're installing vinyl planks on top of a concrete floor, the standard tolerance required is for the floor to be level to 3/16” within a 10' radius.
Yes, vinyl plank flooring can be installed directly on concrete as long as the surface is clean and level. It is important to note that some manufacturers may require the use of a moisture barrier or adhesive during installation on concrete.
All-weather carpet, luxury vinyl flooring and porcelain or ceramic tiles are some of the best flooring options to go over concrete in basements.
Yes, mold can grow under vinyl flooring if moisture becomes trapped underneath the flooring material. Vinyl flooring is not a breathable material, which means that moisture cannot escape through the flooring.
Most vinyl floors don't need an underlay. If the surface you're laying on is level and smooth, a well-cushioned vinyl floor should be fine on its own. Our Luxury Vinyl Click flooring is laid using the same as technique as laminate options in that it's loose laid creating a "floating floor".
For any flooring that requires a floating installation method, be laminate or vinyl planks, use a 6 mils (or thicker) plastic sheet as a moisture barrier. You can also use an underlayment with a moisture barrier built-in for water vapor control.
When properly used, expansion gaps can relieve the pressure from heat expansion that can affect a floating floor and prevent any noticeable buckling or peaked appearance. If the floor is less than 50 ft in length or width, leave at least a ¼-inch expansion gap around the entire perimeter.
If the proper expansion gap is not left during installation, and the planks on the sides push up against the wall, the pressure will cause planks elsewhere in the room to buckle. Buckling floors are repairable, however, they are a major inconvenience and can be tricky.