Is a higher IIC rating better?

A higher number shows better performance. The IIC sound rating does not account for any squeaking or rattling caused by loose wood frame construction. Nor does it account for low frequency footfall noise or structural deflection.

Similarly, you may ask, what is a good IIC rating?

Flooring Joists And Concrete Subfloors

Ref Topping IIC Rating
1–4 9–mm–thick hardwood on 5–mm–thick resilient layer 45–50
1–5 16–mm plywood or OSB on 40– x 90–mm wood strapping on 25–mm mineral fibra board 50–55
1–6 35–mm concrete on 25–mm mineral fibra board 60–85
1–7 Carpet and underlay 75–85

Subsequently, question is, is a higher or lower STC rating better? Higher STC ratings generally are better. This means that extremely low frequencies don’t register on the STC rating scale, thus when a sound on one side of a wall is below 125Hz, the ability of the wall to block sound cannot be calculated. STC is not a direct measure of how many decibels of sound a wall can stop.

Just so, what is the highest IIC rating for underlayment?


What does STC and IIC mean?

STC (Sound Transmission Class) is a measurement that indicates how much noise is stopped (absorbed) by the wall or floor ceiling assembly. ( airborne or voice noise) IIC (Impact Insulation Class) is a measurement that indicates how much impact noise is stopped in a floor/ceiling assembly.

17 Related Question Answers Found

What does IIC mean?

Impact Isolation Class

How is IIC measured?

IIC is the measurement of sound energy blocked by a particular product when used on a tested floor/ceiling assembly. A tapping machine is used to generate a constant impact and sound level on the floor, then the sound energy is measured below.

What is the best soundproofing material for floors?

For soundproofing purposes, one of the best underlayments that you can use is the LAMINATE Flooring Underlayment. This underlayment is made with a vapor barrier and is 3mm thick, giving it the best potential for absorbing sound.

What does an STC rating of 50 mean?

Best Blocking (STC 50) – Full Height Walls (Preferred) Share. A sound blocking level of STC 50 means that a listener in a quiet room would need to exert effort to hear raised speech levels in adjacent rooms, and the speech would not be understandable or disruptive.

What is the best underlay for soundproofing?

Best Soundproof Underlayment. Common underlay materials are cork, vinyl, rubber, and foam. These materials are dense and offer good sound isolation and impact deadening (footsteps). Here are some of the top acoustic underlayment for wood, laminate, and tile floors.

What is a good NRC value?

The NRC figure ranges from 0.00—perfectly reflective—to 1.00—perfectly absorptive. NRC is always expressed as a decimal that is rounded to the nearest 0.05. For example, an unpainted brick that absorbs very little sound may have a rating of .

What is NRC sound rating?

Noise Reduction Coefficient (NRC) A NRC is an average rating of how much sound an acoustic product can absorb. An NRC of 1 means that the product absorbs all sound. The higher the NRC, the better the product is at soaking up the sound. Calculating the NRC for an acoustic product is no small task.

How can I soundproof my floors cheap?

Cheap Ways to Soundproof the Apartment Floor Lay Some Carpets. I did say you might have already implemented some of these. Place Rubber Floor Mats. Install Soundproofing Materials like MLV. More Ideas for Padding the Floor.

How can I increase my IIC rating?

An IIC rating of 50 and above is most common in building code and HOA requirements. The GenieClips® RST or HushFrame Raftare most commonly used on the ceiling to improve the IIC rating, while GenieMat® RST rubber underlayment or Acoustic Sleepers are most commonly used on the floor to improve the IIC rating.

What is acoustical underlayment?

Flooring underlayment —the layer between the floor covering and the subfloor— adds value to commercial flooring systems in many ways. Architects and designers often use underlayment designed to dampen sounds —called acoustic underlayment— alongside acoustic ceiling and wall assemblies to soundproof buildings.

Does acoustic underlay make a difference?

Often combining several layers of spongy material, acoustic underlay provides great underfoot comfort to members of a household. Underlay can make a big difference, especially if installed beneath solid hardwood flooring, as it provides a softer surface, lessening the impact when walking.

How do you soundproof vinyl flooring?

Ways to Soundproof Vinyl Flooring Apply the acoustic underlayment to the subfloor, then apply the vinyl flooring above it. If the vinyl is already down, your choice will be to pull it up to apply the vinyl flooring underlay or simply to put carpeting down over it.

What does FIIC stand for?

Field Impact Insulation Class

Is laminate flooring soundproof?

Laminate or Engineered Flooring Laminate or composite floating floors cause two major noise issues: impact noise transmission and echoing within a room. Both of these problems can be significantly reduced by using Impact Barrier® Flooring Underlayment.

What is a good STC rating?

STC stands for Sound Transmission Class. Basically, STC ratings are an established way to average how much sound is stopped by something. STC ratings are used for windows, doors, walls and most building materials. For windows, STC ratings range from 18 to 38.

What is the STC rating of carpet?

Carpet with Carpet Pad Underlayment available through Carpets Plus Carpet IIC Rating, over standard floor/ceiling construction Interlock * 62-70 Tredmor * 71-73 Easymat 71-73 Cork 6mm 53-65

What is a STC rating?

Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations.

Leave a Comment