Insulating an interior door (room, refrigerator, best, seal)

[nitroae23]

Has anyone ever filled a hollow core door with Great Stuff,or some other foam product to deaden noise.Any problems?

[Narfcake]

Unless you're keen on filling each of the honeycomb pockets inside the hollow-core door, it's not going to work.

[desertsun41]

Narfcake is correct. The inside of a hollow core door is filled with honeycomb webs of corrugated cardboard. The perimeter is a finger joint pine 5 quarter stock. It is impossible to fill an HC door.

Why would you want to do this? The only possible need to insulate an interior door is if you have a musician playing an instrument in that room and you want to deaden the sound. What about the threshhold? You gona put a rubber seal threshold down there inside the house too?

[harry chickpea]

The two previous posters are correct. The seal around the door (including the sweep at bottom) has to be very tight to limit sound. Insulating the door itself for sound will be a patch job at best. Along those lines, a double layer of 5/8" sheetrock screwed to the door would work better than any foam. Studio doors are different than regular doors. Opening them is almost like opening a safe door that leads to a refrigerator.