How to seal the rubber on a garage door?


Just purchased new shop doors. They look lovely. The new doors have a rubber seal on each of the bottom of the doors. Problem is the concrete is not completely smooth so there is several gaps where the rubber seal does not fit tightly against the concrete. The doors face West, the direction of adverse weather in this area which means there could be water or snow that could still enter into the shop under the doors. Not sure about what options are available to remedy the problem. Maybe a threshold? Concrete filler/smoother? Anyone have any thoughts or ideas that might help?

  8 answers
  • Zard Pocleeb Zard Pocleeb on Oct 03, 2018

    I think both of your ideas are excellent.

  • Johnavallance82 Johnavallance82 on Oct 03, 2018

    Hi there you can buy a garage floor bumper that sticks on the concrete to give you a good seal.

  • There might be thicker rubber seals out there to replace it with.

  • Lilly Lilly on Oct 05, 2018

    Thank you for all your thoughts and ideas! Much appreciated.

  • Becki Becki on Oct 05, 2018

    when my new doors were installed, I also had some gaps. They took plastic bags and put them in e rubber sill.

    And it worked

    • See 1 previous
    • Becki Becki on Oct 19, 2018

      My floor wasn't level so where it wasn't touching they took plastic bags and stuffed into the sill where the gap was.

  • William William on Oct 05, 2018

    The rubber on the door bottoms is made to seal against a threshold. You can install a threshold if it won't be in your way.

    • Lilly Lilly on Oct 19, 2018

      Hi! Thanks for your idea! Was definitely thinking about installing a threshold although there could still be gaps due to the unevenness of the concrete. I believe our best action would be smooth the concrete, level it further and then see if the rubber seal touches the concrete more tightly.

  • Sewcrazy Sewcrazy on Oct 14, 2018

    i have the same problem. i've been thinking about attaching pool noodles to the bottom of the garage door somehow.

    am i crazy? has anyone else thought of this?

    • Lilly Lilly on Oct 19, 2018

      Hi! Thanks for your idea! Pool noodles have many uses so I understand. However I've not heard of this. Maybe try it and see if it works.

  • William William on Oct 19, 2018

    If you do decide to level the concrete make sure you use a latex modified concrete resurfacing compound. What I would do is install a threshold with the doors closed. Then shim the threshold till it touches the rubber. Fill any gaps with door and window Great Stuff expandable foam. Cut out any squeeze out once it hardens.