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Best way to soundproof a door on the cheap? Expanding Foam?

Discussion in 'Building' started by Gorguruga, 1 Nov 2015.

  1. Gorguruga

    Gorguruga

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    Got a very thin door so housemates are heard pretty loudly from my ground-floor room when they're downstairs. Even with my door closed, you can sometimes hear the faintest of nose sniffs if someone is in the kitchen or living room. I recently changed the lock on this door and during the drilling I realised it seemed to be filled with mainly paper and foil!

    Before taking the plunge and investing in a soundproof door (not sure which one though?) I was wondering if there might be a way to try soundproofing my existing door. Thought I might as well give it a try beforehand just in case it works, and might save a few quid in the process.

    Happened to run across a message on a since-forgotten forum some time ago where someone described how they used expanding foam in their thin door as a way to soundproof it. I'll try to find the message and quote it here later. Apparently it worked amazingly well.

    Does anyone have any experience with that or any other economical soundproofing techniques? At the moment I'm thinking I should drill about 20 holes at different points on the face of the door and fill each hole with expanding foam?
     
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  3. footprints

    footprints

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    If it is rented you could well be in trouble with the landlord if you start drilling holes and pumping foam. As an experiment how about a rug pinned to the inside of the door or the old stand by for draughts a heavy curtain across the door?
     
  4. cAtLeYx

    cAtLeYx

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    Hi - Could you confirm if you all simply rent a house and split the rent or if you are paying rent based on your room with shared communal areas. If the second, HMO regulations would apply and therefore your bedroom door should be at least 30 minutes fire rated if accessible from a hallway, corridor or protected escape route. This would have a solid core and therefore have better acoustic property?
     
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  5. Gorguruga

    Gorguruga

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    Ah, it's my house so I've got the all clear to experiment from the landlord. (y)

    I tried something similar to a rug but it didn't unfortunately reduce sound to any noticeable level, although I didn't actually try attaching it to the door properly, it was just heaped up at the base of the door where there's is an inch gap between the door and floor. I thought by trying to seal the gap it'd reduce sound but it had no effect.

    I'm hoping for something more permanent than a rug or curtain and something that wouldn't get in the way much if possible. Although I if I spent time to attach a rug or carpet properly they could fit snugly against the door without much overflow. I also came across soundproofing exterior foam sheets, which I think could be attached to the door, maybe a few layers thick. Not sure how effective though.
     
  6. Gorguruga

    Gorguruga

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    Hi, I own the house, thanks for info about the fire door, wasn't aware of that. I started renting out the other rooms only a few months ago. I do have smoke alarms fitted in both hallways but will have to look into the regulations about the fire door.
     
  7. Gorguruga

    Gorguruga

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    Thanks newboy, only 2 tenants so this doesn't apply:

     
    Last edited: 1 Nov 2015
  8. Gorguruga

    Gorguruga

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    Since it's not an HMO by definition and therefore is removed from HMO regulations about mandatory fire doors, this brings me back to the question about the expanding foam?
     
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  10. TonyW2

    TonyW2

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    Probably a honeycomb/egg box centre so unlikely to work.
    Sound will get through any gaps around door, so door construction is not the only consideration.
     
  11. Gorguruga

    Gorguruga

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    I think it is a honeycomb centre. When drilling the fairly big hole for the lock I removed bits of foil and paper which seemed to be wedged into a pocket so I'm guessing the door has lots of these pockets inside (like a honeycomb core).
     
  12. ^woody^

    ^woody^

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    That was probably an expanding foam salesman. Foam's acoustic insulation properties are worse than your existing door.

    You need a dense door and rubber seals around the lining.
     
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  13. Gorguruga

    Gorguruga

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    Maybe he was an expanding foam salesman.. lol.. he did mention the product itself. Searched my history and found the original message here:

     
  14. Nige F

    Nige F

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    Great Stuff Door Insulation sounds like it came from Home Deepot;)
     
  15. ^woody^

    ^woody^

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    Home Despot more like.

    That great stuff is so great it only expands upwards, so as not to leave the door looking like a banana.
     
  16. Gorguruga

    Gorguruga

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    Well after reading that guys post about the foam I popped down to B&Q a few weeks ago and picked up some Soudal Gap Filling Exapanding Foam which I'm yet to use for this but have used it for other filling jobs.

    On the back of the canister it says: "the foam is an excellent thermal and acoustic insulator that sticks to practically all building materials."
     
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