What Is Gypsum Underlayment, and What Is It Used For?

Gypsum underlayment (also known as gypsum floor, gyp floor, gypsum concrete or gyp concrete) is a building material composed of a mixture of gypsum plaster, Portland concrete, and sand. The product is normally batched onsite and pumped into place.

While there are many potential applications for gyp underlayment, the following are the top 5 applications for gypsum underlayment in commercial construction:

Application 1 – Fire ratingwhatIsGypsumUnderlayment650x552

For commercial buildings that require a fire-resistance rating, gypsum underlayment is oftentimes the best and most cost-effective solution. The product acts as a passive fire protection system that effectively meets code requirements.

Application 2 – Sound reduction

No one wants to hear every move that people upstairs are making. It is for this reason that all multifamily residential buildings are required to meet a minimum STC/IIC sound rating of 50.  While there are many more expensive ways to achieve this sound rating, gypsum underlayment in combination with a sound mat remains one of the most cost-effective solutions.

Application 3 – Floor leveling

Either due to settling over time or poor construction, many commercial remodeling projects require getting floors back to level. When pumped onto uneven floors, gypsum underlayment “self-levels” and when cured creates a level floor with a compressive strength similar to that of traditional concrete.

Application 4 – Radiant heating

Modern underfloor heating systems that use fluid flowing in pipes to heat the floor must be encapsulated with a material that will conduct the heat and protect the pipes. Gypsum underlayment is a perfect solution because it can be poured into crevices to stabilize the piping. 

Application 5 – Asbestos encapsulation

Asbestos is a naturally occurring mineral whose fibers are soft and flexible yet resistant to heat, electricity and corrosion. The problem is that when someone inhales or ingests asbestos dust, the mineral fibers can become forever trapped in their body. The trapped asbestos fibers can cause inflammation, scarring, cancer, and eventually genetic damage to the body’s cells. Because of this, the use of asbestos in the construction industry was effectively banned in 1989.

Many commercial buildings built before the late 1980s still contain asbestos. While there are multiple ways to deal with the asbestos, one of the most efficient and cost-effective solutions is to encapsulate existing asbestos with gypsum concrete.

Contact us today to find out how Nettles Construction Solutions can offer you the best services in gypsum underlayment treatment. Our employees are experts in managing the equipment, batching on site, supervising the mixed designs, working with different materials, pumping and placing the material correctly and precisely, and leaving the worksite in pristine condition. 

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