There is a very good insulating as well as soundproofing material that could be adhered to the inner or outer surface of the pocket doors. It is a material called Mass Loaded Vinyl (MLV) for short.
Soundproofing Pocket Doors – Do Pocket Doors Block Sound? The short answer is no – pocket doors do not block very much sound. Whether or not you chose to have pocket doors or the house came that way when you bought it, pocket doors aren't very soundproof.
Even when the door is closed, tiny gaps in a loosely-fitted door allow air to seep from one room into the other. Air from an unheated room infiltrating a heated room wastes energy and produces uncomfortable drafts. Apply a few simple techniques and some weatherstripping to make your pocket door airtight when closed.
Pocket doors do also have some functional issues like falling off of the tracks, they can be difficult to roll, problematic to lock and often make noise if not regularly lubricated.
Pocket doors are a good option for smaller rooms that may not have space for a full-swing door. They're perfect for closets, connecting two spaces (for example between an en suite and a walk-in closet, and small bedrooms where floor space counts.
For a more permanent solution that works for hot and cold weather close the gap between the stationary and sliding door by attaching silicone sealing strip weather stripping like this to the back side of sliding door.
Steps To Seal The Gap Between Double Doors. You can use silicone weather stripping, door sweeps, or a combination of the two to seal the area between your double doors. The silicone creates a soft and durable seal, while the door sweep acts as an extra barrier to prevent cold drafts from entering through them.
In order to fix a gap between the patio door and the frame, you need a screwdriver and a chisel or putty knife. To make this fix, I'm adjusting the screws at the bottom of the door until. Adjust the screws until there isn't a gap between the door and the frame.
In contemporary usage, a vestibule constitutes an area surrounding the exterior door. It acts as an antechamber between the exterior and the interior structure. Often it connects the doorway to a lobby or hallway. It is the space one occupies once passing the door, but not yet in the main interior of the building.
Double doors often require a hardware device known as an "astragal." The astragal helps seal the gap between pairs of doors, and is used to block sound or air drafts.
Mold Platen Insulation (MPI) from The Gund Company is a high compressive strength, heat-resistant composite insulating material. This insulation serves as a barrier between the mold or dies and the platen to resist heat transfer.
Because of their inherent design, sliding barn doors have a larger gap between the door and the wall than a traditional swinging door. The greater gap means that light, sound and even scent have more opportunity to pass from room to room. This can be problematic for bedrooms and bathrooms.
To keep insects from crawling under your door, install a sturdy steel or aluminum threshold under the door. For even better protection, combine this with a door sweep. A sweep is a cheap device that can be found at most hardware stores, and helps to cover the gap between a threshold and the door bottom.
Sliding doors often have an STC (Sound Transmission Class) value that is several points lower than standard doors, and soundproof sliding doors are basically nonexistent, leading many customers looking for soundproofing options after installation.
Again, any gap can cause air to pass through and vibrate the door. To fix, simply remove the door from the track by adjusting the rollers screws down and then removing the top door stop. Realign the door on the track, reinstall the top plate, and readjust the roller screws.
Fill a hollow core door with insulation foam
This option is not frequently discussed, but you can turn a hollow core door into solid by filling it with insulation foam. Make small holes on the edges of the door. Start from a low point on the door and let the foam expand and solidify.