How Interior Doors Reduce Sound Transmission


Your dishwasher shouldn’t be quieter. Better-performing interior doors reduce sound transmission!

How often are you irritated because you can hear your dishwasher or washing machine in the next room? Or maybe you’d like not to hear your teenager’s loud music? What if many of the sounds you’d like to block could be significantly minimized just by upgrading your interior doors? Well, that’s certainly a possibility.

In this post, you’ll learn how interior doors reduce sound transmission.

How sound travels

When sound comes into contact with a barrier like an interior door, some of the energy from the vibrations transfers to the door. The resulting vibrations in the door then set the air in motion, creating sound on the other side of the door. The mass and stiffness of the barrier impact how much sound will transfer.

Thus, the inside of your interior door is critical when considering noise reduction.

Why your interior doors matter

Busy homes or active areas create a lot of noise. However, you’d probably like to keep that noise confined to its space. Upgrading your interior doors is a budget-friendly, easy solution. You’ll want to determine the Sound Transmission Class (STC) and/or the OITC (Outdoor-Indoor Transmission Class). You can read more about STC and OITC in our blog.

Once you’ve determined what your level of sound reduction is, then you can review all the doors that meet those requirements. We offer ProCore® solid cores for all molded doors as an upgrade. This can reduce the transmission of sound by up to 50 percent compared to a hollow core door.

Our TRIA™ interior doors are carved from composite wood and have a solid core. The TRIA collection doors have the highest STC ratings of all our interior doors.

Where better interior doors will benefit you the most

Where to install higher-quality interior doors depends on the layout of your space as well as what occurs in it. We’ve discussed the annoying sounds of a dishwasher and washing machine. If your home has its own laundry area, install a solid core door here to reduce the myriad of sounds. Kitchens are typically open spaces now, so it might be harder to ignore the dishwasher.

They also make sense in bathrooms or bedrooms. Again, these are noisy areas, so a great solid door in a child’s bedroom will hopefully keep him or her asleep. For bathrooms, eliminate noise related to plumbing and the blow dryer.

By reducing the transmission of sound throughout your home, you can create a better experience for each of your spaces. And interior door upgrades are certainly not a blow-the-budget kind of upgrade. It’s worth checking out some better doors if the noise in your space is impacting your quality of life.

We invite you to review all our interior doors. Better interior doors reduce sound transmission, providing you a more serene environment. Just another way that JELD-WEN is here to make your possibilities come true.

Wood Composite Interior Door Benefits

Wood composite interior doors

Because you deserve the best interior doors

There is more to an interior door than just what you see. What it’s made from and how it’s made impact many factors of its performance and style. When determining what material is right for your doors, consider the many benefits of composite interior doors. Describing the material as composite wood means it is made from an engineered wood product, which is constructed from wood fibers. Wood composite door benefits include better performance, reduced sound transmission, sustainability opportunities and more design options.

Wood composite interior doors perform better

Composite doors don’t react to humidity the way wood doors do. Solid wood doors can expand or contract depending on the level of humidity. Composite doors, however, resist splitting and warping.

Composite doors are also more durable. They can withstand the daily abuse an interior door encounters.

Any room can be a quiet room

Composite doors have a solid core, which helps block out unwanted noise. When compared with a hollow door, composites can block up to 50 percent more noise. There are plenty of spaces in residential and commercial settings that could benefit from this application. Use a composite door on bathrooms, laundry rooms or offices.

Composite doors offer a more sustainable solution

Composite doors can be No Added Urea Formaldehyde (NAUF) certified. This references the type of resin used in composite woods. Formaldehyde occurs naturally in some wood. Having the NAUF certification simply means there was no further formaldehyde added. Composite doors can also contain recycled wood fiber content.

Fire-rated available

Our composite wood doors are also available as 20-, 45-, 60- and 90-minute fire rated. This can offer additional safety features. Options depend on door size and style. Learn more about fire ratings for doors.

Elevated design

Composite doors provide so many design possibilities! There are options for contemporary and traditional looks. You can even design your own with our TRIA™ interior doors. The TRIA collection features three options: C-, L- and R-Series. The C-Series offers a carved appearance with simulated raised panels and two etched profile choices. The L-Series is sleek and simple. Two solid surfaces surround the interior panel. This means no gaps or places in need of touch-up paint. The R-Series stands out with dramatic contours and has three molding detail options.

Our molded wood composite interior doors offer several all panel designs. These are available as textured or smooth. They arrive ready to paint.

Composite doors are also available as flush. Flush doors are clean and offer a traditional look. Because they are composite, they have minimal maintenance. Choose a wood finish or paint.

Composite wood doors have much to offer your spaces. With design and performance, these doors are sure to meet all your needs.

Fire-Rated Doors: What You Need to Know

fire-rated doors

Fire-rated doors help reduce the spread of fire and smoke in a home or building. Both commercial and residential structures can use fire-rated doors.

Fire door materials and parts

Fire doors can consist of a combination of materials: gypsum, steel, timber, Vermiculite, aluminum and glass. Both the slab and the door frame must meet requirements to earn a fire-rating. The door frame parts include seals, hardware and the structure. On an even more granular level here is a breakdown of elements:


  • An intumescent strip, which expands when exposed to heat
  • Gaskets to prevent the passage of smoke
  • Neoprene weatherstripping

Door hardware

  • Automatic closing devices or objects
  • Ball-bearing hinges
  • Gas seals
  • Positive latching mechanisms
  • Smoke seals

If a window is present,it must have a rating as well. Fire-rated glass may contain wire mesh glass, liquid sodium silicate, ceramic glass or borosilicate glass. Wired glass typically withstands the fire. The sodium silicate liquid acts to insulate heat transfer.

Standards for fire-rated doors

The National Fire Protection Association (NFPA) 80 standard regulates the installation and maintenance of assemblies and devices used to protect openings in walls, floors and ceilings against the spread of fire and smoke. The International Building Code (IBC) and International Fire Code (IFC) reference the NFPA 80 standard.

NFPA 80 5.2.4. requires the following items be verified, at minimum:

  • No open holes or breaks exist in surfaces of either the door or frame
  • Glazing, vision light frames and glazing beads are intact and securely fastened in place, if applicable
  • The door, frame, hinges, hardware and noncombustible threshold are secured, aligned and in working order with no visible signs of damage
  • No parts are missing or broken
  • Door clearances at the door edge of the door frame (wood door), on the pull side of the door, do not exceed clearances listed in 4.8.4 (the clearance under the bottom of the door, maximum of 3/4″) and 6.3.1 (top and edges, 1/8″); or for metal doors (top and edges, up to 3/16″)
  • Self-closing device is operational
  • Coordinators, if installed, close the inactive leaf before the active leaf
  • Latching hardware operates and secures the door when in the closed position
  • Auxiliary hardware items that interfere with or restrict operation are not installed on the door or frame
  • No field modifications to the door assembly have been performed that void the label
  • Gasketing and edge seals, where required, are inspected to verify their presence and integrity

Fire-resistance ratings

The fire-resistance rating is the duration for which a passive fire protection system can withstand a fire-resistance test. It is most often a measurement of time. Fire ratings can be 20, 45, 60, 90 or 180 minutes. A third-party agency tests doors to ensure they meet the requirements.

Standards and testing

Testing of fire-rated doors is via Underwriters Laboratory (UL) standards and NFPA standards:

  • UL 10B, Fire Tests of Door Assemblies (neutral or negative pressure)
  • UL 10C, Positive Fire Pressure Tests of Door Assemblies
  • NFPA 252, Standard Methods of Fire Tests of Door Assemblies

The IBC also requires side-hinged or swinging fire doors be tested with positive pressure, using either UL 10C or NFPA 252.

Testing of doors uses heat up to 1925 degrees Fahrenheit. If the door remains in the frame with no through openings and limits flames, it’s certified with an endurance rating of the appropriate minutes.

After the fire endurance test, the test specimen undergoes the hose stream test. The test consists of a fire hose delivering water at 30 psi from 20′ away. Building codes throughout the U.S. typically stipulate that 20-minute doors are exempt from the hose stream test.

JELD-WEN fire-rated doors

We offer fire-rated doors for interior and exterior usage. The highest-rated exterior doors we offer (90-minute) are our IWP® wood series and steel doors. Our IWP wood and solid mineral core flush interior doors also offer ratings up to 90 minutes.

You can view the complete listing of our fire-rated doors here.

Interior Door Design Ideas

interior door design

Redefine your spaces with these chic looks

Do you think of your interior doors as purely functional? Are they just something you must have for privacy? What about their design? Could new interior doors give your space a fresh look?

Interior doors are a budget-friendly way to redefine any room. And it’s a relatively easy DIY project. In this post, we’ll share some interior door design ideas you can try.

What’s behind the door influences its design

The average home has 10 interior doors. Depending on what’s behind the door, your interior doors could have different purposes. Bathroom doors are for privacy and typically have a solid core to reduce sound transmission. Interior doors that divide two rooms may be more creative. Consider how the use of barn doors acts as a barrier but also adds convenience and style.

Contemporary ideas

With a few purposeful lines, interior doors can capture a simple, unique look. Add some color to these doors for a more dramatic look. The smallest accents can add just enough style, creating a signature aesthetic.

Another contemporary idea is the use of panels. With multiple-panel configurations, you can also add glass. Clear or translucent glass inserts protect privacy or let light into the space. With multiple panel options, you can use the same door design throughout with different configurations for a consistent look.

Interior doors as art

You can design your own interior doors. A composite wood door is an excellent choice for a design of your own. Create an etched or carved appearance for a look that’s very Old World. Or create specific details designed to be straight or curved, depending on the aesthetic you most desire.

Prefinished woodgrain options

If you love the look of rich wood but don’t want the maintenance or costs, choose a prefinished woodgrain look. Our prefinished woodgrain interior doors use a hand-brushed finishing technique and two-tone process for a striking look. They are also molded doors with no gapping or stile/rail separation.

Change your space with new doors

Now that you’ve considered the possibilities of interior door design, it’s time to get inspired. View our complete line of interior doors including molded and flush.

Old World Interior Doors


If you’re designing for Old World style, don’t forget about your interior doors. Interior doors don’t have to be plain or boring. Old World interior doors can have a carved appearance, raised panels and other details. There are many options that offer great appeal. There are several benefits associated with how a composite wood door is made. In this blog, we’ll take a look at those.

Benefits of wood composite doors

In addition to adding style, interior doors can offer other benefits. First consider the materials. Deriving doors from composite wood, an engineered wood product made from wood fibers, can provide better performance than wood. Composite wood doesn’t react to humidity the way that all-wood doors do. It resists bowing, splitting and warping. Composite is also more durable. It can withstand the daily abuse that an interior door must take. This type of core also helps to block out sound so when closed, any room can be a quiet room.

The look of wood composite doors

Because composite doors aren’t all-wood, there’s no visible grain or imperfections to bleed through the paint. These painted doors will look great for years.

Creating Old World interior doors

Old World style is a blend of hard and soft; formal and comfortable. Carvings and details are found throughout homes in patterns, on furniture and of course on doors. Composite doors can be finished with a carved appearance. There are a variety of patterns to customize the look. Complement the etchings in your mantle or the intricacy of your molding in your interior doors.

First you would choose your profile, which can be wide or narrow. Then decide how intricate you want the door. Panels can be raised or inlaid. Dramatic contours make a statement. Complete the look by choosing a color for your door. Old World color patterns are known to be rich and regal. Colors are often dark like burgundy, navy or forest green. Ocher and cream are lighter. Really, the choice is up to you and how much you want your Old World interior doors to stand out.

To learn more about the benefits and options for composite wood doors, view our TRIA™ Composite Interior Door Collection.