Is Flexicore Soundproof (All you need to know)

Flexicore buildings, also known as “modular construction,” are a great way to build a home. They’re affordable, sustainable, and customizable. They’re a good option for builders who want to speed up construction time and minimize waste by using standardized building components.

Is Flexicore Soundproof? Yes, Flexicore is a great soundproofing material because it’s dense, thick, and hard to break through. It absorbs sound waves instead of bouncing them back, so it reduces the amount of noise that can get through to the other side.

If you feel that your condo or home is letting in too much sound and is made of flexicore then you need to read this guide on how to soundproof the flexicore walls on your own.

Soundproofing with Flexicore

Soundproofing with Flexicore

Soundproofing is a critical aspect of building construction, particularly in environments where noise pollution can cause disruption and discomfort. Flexicore is a soundproofing material that has been gaining popularity in recent years due to its unique properties and benefits. 

This section will discuss how Flexicore works in soundproofing, its advantages and disadvantages over traditional soundproofing materials, and its testing and certification for soundproofing applications.

How does Flexicore work in soundproofing?

Flexicore is made up of concrete that is reinforced with high tensile strength steel wire, which creates a composite material that is both durable and flexible. 

When used for soundproofing, Flexicore can significantly reduce the transmission of sound waves by absorbing, reflecting, and dissipating them. The concrete layer in Flexicore acts as a barrier to sound transmission, while the steel wire reinforcement helps to dissipate vibrations and reduce noise levels.

Flexicore vs traditional soundproofing materials

Flexicore offers several advantages over traditional soundproofing materials such as mass loaded vinyl, acoustic foam, and fiberglass insulation. 

Flexicore is more durable and resistant to wear and tear than these materials, which can deteriorate over time. Additionally, Flexicore is more effective at reducing low-frequency sounds, which are more difficult to block using other materials.

Advantages and disadvantages of using Flexicore for soundproofing

Flexicore has several advantages as a soundproofing material, including its durability, flexibility, and effectiveness at reducing sound transmission. However, it can be more expensive than traditional soundproofing materials and may require specialized installation techniques.

Testing and certification of Flexicore for soundproofing

Flexicore has been tested and certified by independent acoustical consultants and laboratories for its effectiveness at reducing sound transmission. It has also been approved for use in building codes and standards in various countries.

Flexicore Soundproofing Applications

Flexicore Soundproofing Applications

Flexicore can be used for a wide range of soundproofing applications in various settings. This section will discuss some of the common applications of Flexicore for soundproofing.

Residential soundproofing

Flexicore can be used in residential buildings to reduce noise transmission between floors, walls, and rooms. It is especially useful in multi-story buildings where noise from one floor can disturb residents on other floors.

Commercial soundproofing

Flexicore is commonly used in commercial buildings such as offices, hotels, and hospitals to reduce noise levels and provide a comfortable environment for employees, guests, and patients. It can be used to soundproof walls, ceilings, and floors.

Industrial soundproofing

Flexicore can also be used in industrial settings to reduce noise pollution from machinery and equipment. It is commonly used in factories, manufacturing plants, and power generation facilities.

Transportation soundproofing

Flexicore can be used in transportation applications such as airports, train stations, and highways to reduce noise pollution from planes, trains, and vehicles. It can also be used in the construction of sound barriers and walls along highways and railways to reduce noise levels in nearby residential areas.

How to Soundproof Flexicore Walls?

How to Soundproof Flexicore Walls?

If you are still unhappy with the soundproofing of the flexicore you can apply some soundproofing methods to make it more soundproof.

Soundproofing flexicore walls can be a fairly simple process, but you’ll need to know what materials you’re working with. Following are some of the best ways to soundproof flexicore walls:

1. Add drywall

Add drywall

Drywall is an effective soundproofing material, and it’s also one of the easiest to install. It can be cut with a utility knife and nailed into place using finishing nails or construction adhesive.

2. Upgrade the insulation

Upgrade the insulation

Add extra insulation to your flexicore walls and ceilings if you want to improve your soundproofing. The right type of insulation will help absorb sound vibrations and reduce the amount that reaches your ears. You can add more fiberglass or cellulose.

Add insulation under the floorboards or in an attic space above you, if possible. This will also help keep noise from getting through those areas as well as blocking it from coming up from below or in front of you.

3. Use soundproofing spray foam

Use soundproofing spray foam

Spray foam is an excellent option for soundproofing flexicore walls. It’s easy to apply and can be used in any room because it doesn’t require special ventilation. Spray foam is also ideal for soundproofing floors, ceilings, and other surfaces.

4. Seal your windows and doors

Seal your windows and doors

Windows and doors are the primary sources of sound leaks in flexicore homes. You can use weather stripping, soundproofing foam around the door frame and even a door closer to reduce noise. A door sweep at the bottom of your door will also help seal out unwanted noise when it’s shut.

5. Apply soundproof paint

Apply soundproof paint

Apply soundproof paint to your flexicore wall and get the same effect as a soundproofing material. There are many different kinds of soundproof paint, so you can choose one that’s right for your space.

Soundproofing paints are easy to apply and they help a bit when it comes to reducing noise in a room. They’re also available in many colors, so you might be able to find something that matches your walls perfectly.

6. Hang heavy curtains on your windows and your walls

Hang heavy curtains on your windows and your walls

Hang heavy curtains on your windows and your walls. Curtains can reduce sound by up to 30%. You should hang curtains on both sides of the window, to prevent sound from coming through and also muffling it when it does.

Curtains made from heavy fabrics like velvet and silk are recommended because they absorb more noise than thin fabrics.

Curtains should be hung at least 1 foot off the floor, so that they aren’t in direct contact with any walls, which would cause them to absorb sound instead of blocking it completely.

7. Add acoustic panels to your room

Add acoustic panels to your room

If you’re looking for a more permanent solution, acoustic panels are an excellent choice. These panels absorb sound rather than block it and can be installed on walls or ceilings. They come in a variety of colors, shapes, and sizes, so you can pick the ones that match your decor best.

However, acoustic panels are usually pretty expensive. If this option is out of your budget range, consider one of the other methods outlined here.


Flexicore is a great material for blocking out sound. Concrete has a very high mass that makes it difficult for noise to penetrate through the material, so you’ll be able to hear less of what’s going on in other rooms or spaces.

In conclusion, Flexicore is a versatile soundproofing material that offers several advantages over traditional soundproofing materials.

Its unique properties make it an effective solution for reducing noise levels in various settings, from residential and commercial buildings to industrial and transportation applications.

Frequently Asked Questions (Is Flexicore Soundproof)

Do condos have good soundproofing?

Yes, condos have great soundproofing. The walls between units in a condo complex are typically made of concrete, which is a great sound barrier. In addition, the air gap between the walls and the ceiling also helps to reduce noise transmission.

Moreover, many condos are constructed with double-pane windows and thick walls to prevent noise from outside from getting in, and many also have floor-to-ceiling windows that let air flow through the space and help reduce the amount of sound coming from inside the condo as well.

If you’re looking for a condo that has great soundproofing, one of the best options is to buy an apartment in an older building. Older buildings tend to be built with more insulation and better window treatments than newer ones, which means they tend to be quieter overall.

What is a Flexicore building?

Flexicore building construction uses concrete poured into individual cells, which are stacked to form a continuous wall. This technique reduces the weight of the structure by eliminating the need for steel reinforcing bars, which means that different shapes and patterns can be created in a Flexicore building.

The term “Flexicore” comes from the fact that the building has a flexible core, which consists of a lightweight concrete slab that allows for easy expansion or contraction in response to changes in temperature and humidity.

Can you hear neighbors in a condo?

Yes. It is possible to hear your neighbors in a condo building, especially if they are being loud or playing music. However, the walls of condos are made of thick concrete and the noise will not be much audible as concrete acts as a good soundproofing material.

Can you soundproof a condo ceiling?

Seal gaps between joists and studs with foam sheets. Block out holes from pipes and wires with insulation materials. Install drywall over existing drywall to create an air gap between the two layers, or purchase acoustic panels made specifically for soundproofing the ceiling.

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Brendan Ratliff
Brendan Ratliff

As a soundproofing and acoustical professional, I have helped new homeowners, builders and remodelers with their projects. I also help contractors/designers learn how to properly install soundproofing in their clients homes.
I enjoy helping people understand the process of soundproofing and acoustical construction. is a one-stop solution for all of your soundproofing related questions.