How to Soundproof a Doorway

Doors are generally the weak link in any room when it comes to soundproofing and yet they are often overlooked in large scale soundproofing projects.

Before your take on your walls, floors or ceilings the door is actually one of the first things you should soundproof.

Soundproof a Doorway

Reason being that doors can be a big sound leak as noise can very easily travel through them. Cheap doors are constructed of thin materials which are usually completely hollow, supported with basic cardboard lattices which offer minimal sound resistance.

Poorly fitted doors will have large gaps around the frame which will enable air-borne noise to freely leak into your room.

Adding density and sealing up gaps are the best ways of prohibiting sound from travelling through a door.

If you want to know how to soundproof a doorway then proceed to follow the steps below.

Each of these steps can be done on their own, however we recommend combining as many of them as possible to obtain the most effective result.

Seal the Frame

The gaps between your wall and door frame can often enable sound to leak through.

Sealing up a door frame often requires a steady hand and some good quality acoustic sealant such as green glue. If you have both of these then you can follow the steps below.

How to Seal a Door Frame

  • Firstly place masking tape around your door frame. The masking tape should be able to stick to your wall flush with the frame.
  • Fit the sealant of your selection into a sealant gun.
  • Then apply the sealant into the gaps around your frame.
  • Smooth out the sealant making use of your finger dipped in some warm water – simply dip your finger in warm water and run it over the sealant to get a smooth, clean and well-sealed finish.
  • Lastly remove the masking tape and leave it to dry.
Keeping Fun Indoor Weather Stripping

Use Acoustic Thresholds

An acoustic door threshold works in a similar way to a door sweep because it creates a (more or less) airtight seal between the door and the floor prohibiting airborne sound from getting through.

A standard door threshold is a piece of metal which sits underneath your door and covers the join between your flooring.

Acoustic Thresholds

Acoustic door thresholds differ to standard thresholds because they have a raised lip which runs down their middle, this is typically made of rubber.

They usually work by creating a seal with the door when the door is closed.

Combining one with a door sweep will mean that the bottom of your door is double sealed and therefore pretty much indestructible to all sound!

How to Install an Acoustic Threshold

For this installation you will require a screwdriver, a drill (not always necessary), screws, a saw and a claw hammer.

  • Firstly unscrew the screws on your original threshold and pull up the threshold. You might need to slide the claw hammer underneath the threshold to help lever it off.
  • Measure the space and check that your new acoustic threshold fits, if not then cut it to size.
  • Place your new threshold down and utilize a pen or screw to mark where the screws will go – if you are really lucky the holes may line up with your previous holes.
  • Before you screw it down check the door can close over it and that the rubber seal is positioned perfectly, if not make adjustments.
  • Proceed to drill small guide holes for the screws to go into.
  • Screw the threshold down, making sure that all screws are tightened up completely so that the screw head is not protruding at all (otherwise you will be forever ripping your socks on it!) and there is no gap beneath the threshold and the floor.

Use Weather Stripping

Sealing gaps between your door and the frame is actually one of the most effective door soundproofing methods.

The most efficient and effective way of doing this is to apply door weather stripping around the edge of your door where the door sits in the frame when closed.

Weather stripping is typically utilized for preventing draughts. If air can get through then airborne sound can get in too, so weather stripping is extremely useful for soundproofing.

The main reason why many doors leak sound is that they don’t fit their frames quite well, this allows airborne sound to flow freely into your room.

Weather Stripping

Utilizing weather stripping is a simple and highly effective method of completely sealing up the gap between your door and the frame.

Ensure you purchase high quality stripping as cheap options will quickly degrade and fall to bits, rendering them useless.

Installing weather stripping is extremely easy, particularly if you purchase stripping that is self-adhesive. All you have to do is peel off the back and press it tightly into place.

When you have finished the process close your door and leave it closed for a few minutes to seal the stripping down.

If your weather-stripping is not self-adhesive make sure to glue it in with a high-quality adhesive bond that resists vibrations.

Weather-stripping has its limitations though – it can’t seal the gap at the bottom of your door, and this area can be a huge problem for many doors.

Weather-stripping combined with a door sweep is an extremely effective door soundproofing solution.

It’s not really uncommon for a door to have 10mm of space beneath it, which obviously will let a lot of sound in….to fix this you may require a door sweep…

Tips

  • Once you’ve completed a few soundproofing steps, test your results by utilizing a decibel meter or a decibel meter app on your phone. This device will tell you precisely how much noise is making it past your door. At best, the meter will only show a reading of 10 to 20 decibels.
  • If you want to know how to soundproof a doorway made of steel, you can spray a rubberized automobile undercoating on each side. Then you can proceed to paint over it with oil-based paints.

Conclusion

You can cut down on the exterior distractions by taking the time to figure out how to soundproof a doorway. You can even select a basic solution, such as placing a rug before the door. Keep trying out solutions until you find the one that works best for you.

We hope this article helped you work out the best way how to soundproof a doorway and that your new-found tranquility helps you sleep much better whether its during the daytime or nighttime!                                              


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