The inside of the the door skin yes.
Dynamat door inside or outside.
I used about 2 3 square feet there.
Dynamat extreme is about 1 8 thick rubber based just like strip caulk that you would use under the roof rail strips.
Make a piece to fill any large holes best you can yes msg fiberglass aluminum flashing anything you can mount to the door really then cover with more closed cell foam or peel n ply.
Or just behind panels.
That whole panel is like a big drum membrane so even putting some material on it helps a lot.
They like hearing the sound of their own voices and my two nieces are always yelling at each other.
The people in my house are loud af.
Dynamat is a like a think sheet of tar sandwiched between two foil sheets.
Dynamat products damp vibrations stop noise and block heat.
I have a hollow core bedroom door.
The most difficult part of the project is removing and refitting the interior of your vehicle as you ll have to remove the door panels carpet paneling and headliner before installing the product.
Alan slapping dynamat etc on to the inside of the outer panel is a very good idea if you re trying to kill noise from the outside.
Dynamat can be used in any vehicle to create a cool and quiet ride.
Should i place the soundproofing material on the outside facing the people or on the inside.
How to install dynamat and kilmat 1.
2 boxes will do a car unless you go crazy then its about 3 1 2.
On the doors we install extreme on the outer skin then use dynaliner 1 4 on the door structure to keep any.
Another great cheap mod is adding foam baffles to the back of any door deck speakers.