Asked on Jan 23, 2018

How to repair a hole left from the removal of old dryer vent.

by Avc27528829
I want to remove the old dryer vent attachments, problem is that interior wall is drywall and exterior wall is concrete blocks and dept between 2 walls is approx
6 inches hole size is about 6 inches. interior attachment is round and exterior attachment is squared. please help.
  4 answers
  • Holly Kinchlea-Brown Holly Kinchlea-Brown on Jan 23, 2018

    Interior patch is fairly easy, remove the metal tube, place fibreglass insulation in the hole, cut a piece of drywall slightly smaller than the hole, put in hole, keep in place with mesh drywall tape, mud (probably need a couple of coats) the edges, sand smooth when dry and paint. I would assume the exterior hole would be treated similarly... would attach a concrete mesh over the hole and mix up a cement compound to go over the mesh, smoothing out with a trowel...I must confess that I have never patched concrete (yet).

    • Avc27528829 Avc27528829 on Jan 23, 2018

      Thanks for your advise the side I am most worried about is the concrete side since drywall interior is a breeze I have done many and had great success.

      thanks for your advice.

  • Francesca Francesca on Jan 24, 2018

    Check out Paul Ricalde on you tube. Excellent videos on repairs etc.

  • Roland Ronish Roland Ronish on Jan 24, 2018

    The outside can be done with mortar mix. Make it quite thick and build it up from the bottom about an inch at a time, just in from the outer wall. After it sets, put another layer on until the hole is closed. Don't do it all at once because the mortar mix shrinks a tiny bit, also it may sag out. The final "smooth" layer should be a little thinner for easier working. Fill the indented space and paint. Good luck.

    ' layer can be a little thinner for eaisier working

    • Avc27528829 Avc27528829 on Jan 25, 2018

      Thanks Roland,

      for your advice on this concrete repair I thought it was more complicated. I will get right on it and also replace some

      chipped and broken tiles from my front door veranda since I am going to work with mortar mix might as well make a list and do all the pending repairs around the palace.

  • Deborah S Cripple Deborah S Cripple on Jan 24, 2018

    I would try to get a close match to the current brick, put it in the square as a filler and mortar it in...go forward as stated above...

    • Avc27528829 Avc27528829 on Jan 25, 2018

      Thanks Deborah,

      Your idea is also highly appreciated and I will be using it in combination of others to make the repair more sound.

      Enjoy your day.