Floor Joist Isolators (Case of 50)

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    Made in USA

Floor Joist Isolators (Case of 50)

Soundproof Cow makes it easy to limit the amount of noise that is transferred through floors into adjacent rooms. With soundproofing floor joist isolators from Soundproof Cow, you’ll reduce noise with an extra layer of isolation material.

If you’re rebuilding or installing brand new floors, these U-shaped isolators fit easily around floor joists to prevent vibrations from coming through from above or below. Installation is easy and tool-free. You just snap the floor joists into place over any kind of 2X lumber.

Each soundproofing floor joist isolator is 1 1/4-inch thick. When placed on 16-inch centers, each case of 50 will provide 64 square feet of coverage. These isolators are particularly effective at blocking low-frequency noises — the type of sounds with the largest wavelength that travels the farthest distance. Order your floor joist isolators from Soundproof Cow today for shipment in one to three business days.

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Weight 20 lbs
Thickness 1 1/4 in.
Weight 20 lbs./case
Coverage 64 sqft. when placed on 16 in. centers
Quantity Case of 50
Availability Usually ships in 1-3 business days

Soundproofing Floor Joists

If you are soundproofing a room, it’s important not to neglect the floor. While most sound transmission may come through walls, any barrier between you and the outside of your space needs to be reinforced against sound to truly protect you from unwanted noise transmission.

Part of soundproofing your floor is isolating the flooring from the structural assembly. This is important due to the problem of impact noise, noise caused by vibrations and impacts rather than through airborne frequencies. This noise can be just as distracting as airborne noise.

Block Vibrational Noise Through the Floor

Therefore, for true floor noise and sound reduction, you need Floor Joist Isolators. These are U-shaped pieces of thermoplastic, which is known for its sound control properties. The pieces fit around your joists and block the vibrational noise from coming through your floor. The isolators can fit on any 2X lumber product, and they are easy to install.

In fact, you simply fit them over the joist and snap them into place. There are no tools of any kind required, and anyone can do it, so if you are working on a do-it-yourself soundproofing project like creating a home recording studio, these are a perfect item to include.

Before laying down sound-deadening rugs, barriers or other floor soundproofing material, you need to control for vibrational noise. With our Floor Joist Isolators, you have the tools you need. For an affordable, effective addition to a complete floor soundproofing solution, order your Floor Joist Isolators from Soundproof Cow today.

Product Availability

Case of 50 (64 sqft when place on 16 in. centers)
Case of 100 (128 sqft when place on 16 in. centers)

Features / Benefits

Good Soundproofing Performance — Floor Joist Isolators are attached to floor joists in order to structurally isolate floor surfaces, including substrates, from the structural support elements. They are a cost effective product that reduces sound transmission through floor or ceiling assemblies. Floor Joist Isolators are perfect for applications that use the “Box in a Box” or “Room in a Room” construction methods commonly used when building a professional home theater or recording studio environment.

Quality — Floor Joist Isolators are made from a medium density thermoplastic that is commonly used to make vibration isolation feet or vibration damping pads for large industrial machinery. The raw material is a time tested vibration isolating material.

Ease of Installation — Floor Joist Isolators are friction fit over any wood with a 2 inch width (actual width equals 1.5”). No messy glues or adhesives are needed to install is product. No tools required!

Cost Effective Soundproofing — Floor Joist Isolators are our most cost effective sound isolation product due to the ease of installation. Labor costs are minimal to install this product.

Light Weight and Low Profile — Floor Joist Isolators are designed to provide effective soundproofing performance with minimum added weight and thickness. The low profile maximizes valuable square footage.

In-stock — We stock Floor Joist Isolators in large quantities. Most orders are filled and shipped the same day the product is ordered.

Made in the USA


Great for:

  • Professional and Home Theaters
  • Professional and Home Recording Studios
  • Band practice rooms
  • Broadcast Studios
  • Any environment that uses “Room in a Room” or “Box in a Box” construction method

Product Dimensions

Floor Joist Isolator Diagram

Installation Details

Tools Needed: None

Materials Needed: None

Customer Reviews

Average Customer Ratings: 4.8 (34 reviews)

The times I talked with you on the telephone and corresponded through email you have been very helpful and efficient. I would highly recommend Soundproofcow.com to anyone!

– S. Cimino, PA

I have emailed a lot of different manufactures and I have to say your customer service is head and shoulders above all of them. I emailed your company at about 9pm my time and when I woke up the next morning you had already answered my question and then the follow up was a few hours later. I am impressed. Thanks a lot for the quick turn around!

– E. Gustafson, NV

I just wanted to send a quick thank you for your rapid response and helpfulness. I very much appreciated it. You have been responsive in every way all through the process. It has been a pleasure doing business with you and your company.

– T. Alexander, CA

I just wanted to let you know that in the end, sealing the air spaces on this door worked just fine and took care of the problem.

I really appreciate you taking so much time to share your expertise with me, and in particular recommending I try the simpler solution before investing in more expensive noise barriers. That is a big credit to you and your business.

– Mike

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