To soundproof a door, make it structurally strong enough to block noise by replacing it with a solid core door or by adding mass loaded vinyl, soundproof blankets, and panels to the existing door. Then, seal the gaps with a door gasket, door sweep or spray foam to prevent air leaks.
Noise pollution is a real problem and although soundproofing walls, floors and ceilings seems the obvious solution, soundproofing doors can also help. Even if noise isn't a problem in your home, you might be a musician and need to reduce the noise escaping your home.
Fiberglass doors have some type of foam at their core, which gives them the opportunity to be extremely well-insulated and one of the best soundproof door options if the foam is high-density.
How much do soundproof doors cost? Soundproof doors are expensive and can cost between $1000 and $4000. However, solid core doors are comparatively cheaper and very useful for soundproofing.
Glass doors are a pain to try to soundproof because either way, you will need to cover the glass in some way to block the intruding noise. Of course, when you block the glass, you mostly make a glass door useless by not being able to see the view.
The easiest and most cost-effective way of soundproofing a glass door is by covering them with soundproof curtains. These curtains are basically heavy drapes which will help deaden the sound that is entering or leaving the room.
Exterior French Door Soundproofing
Exterior french doors (also know as garden doors or terrace doors) are easier to soundproof than interior french doors. They are usually sealed better and the glass is at least dual glazed–or should be. They can be either inswing or outswing.
Buy Solid Doors to Block Sound
Between the thin surfaces and the air-filled core, not much is there to block the movement of sound because they're built like drums. Solid-core exterior or interior doors block noise more effectively because of their density.
First, try Green Glue acoustical caulk. This product is STC rated; meaning it has proven sound blocking abilities. You can also use weather strips around and between the doors to close up any gaps. Or, if you already have weather strips, try and find out how old they are because you may need to replace them.
The company's website states that sliding doors made of soundproof glass cost $1,200 to $4,000 on average, excluding installation costs. This price range is close to the estimate by CostOwl that I mentioned earlier in the article.
It's possible to completely soundproof a room, but you'll need to address the source of the sound, its entry point, and its reflection points. Depending on these factors, you may use a sound booth, acoustic panels, acoustic foam, curtains, and/or window treatments to block incoming noise.
Glass transmits a lot of sound energy at its resonant frequency and at low frequencies. Laminated glass and insulated glazing units both reduce sound transmission through glass by reducing resonance and adding air-space.
Bedroom: Soundproofing a 10-foot-by-10-foot bedroom typically costs around $300 to $400, but the cost can reach upward of $1,500. Home Theater: A smaller home theater with basic soundproofing can cost around $1,000.
However, when it comes to soundproofing, the difference between hollow and solid wood doors is not comparable. Doors made from solid wood are much denser and heavier, which automatically means they provide better sound insulation.