New TPO roofover blocking indoor antenna signal?

Discussion in 'TiVo Roamio DVRs' started by TivoJD, Aug 9, 2017.

  1. Aug 9, 2017 #1 of 12
    TivoJD

    TivoJD Active Member

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    I've had a Roamio OTA for over a year with an indoor Mohu Leaf antenna taped to the wall and it's worked beautifully. Yesterday I had a new roof put on the house (it's a roof-over that is a membrane that goes right over the old roof and there is a layer of Styrofoam with a foil like layer on both sides under the membrane) and now I get no signal at all for any channels. Has anyone else run into this?
     
  2. Aug 9, 2017 #2 of 12
    PSU_Sudzi

    PSU_Sudzi Well-Known Member

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    No but I think it's fair to say it's more than a coincidence. Have you tried relocating the antenna to see if you get a signal, maybe near a window?
     
  3. Aug 9, 2017 #3 of 12
    TivoJD

    TivoJD Active Member

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    I did, but the direction where the signal comes from is the side of the house that has no windows except in the dining room and kitchen and even those are not really external windows, they are covered by a metal carport, so I get nothing. Guessing if I want to have OTA, I am going to need an outdoor antenna now.
     
  4. Worf

    Worf Well-Known Member

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    If that foil is as you describe, maybe metallized mylar or actual metal foil, that would basically be a huge shield that blocks your antenna....
     
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  5. Nickipedia

    Nickipedia Nick of Time

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    This will definitely block or severely diminish your reception. This type of insulation is called PIR (Polyisocyanurate), it has a sheet of aluminum thermoset to the surface. It's popular in roofing with corrugated steel, as well as under vinyl siding. My house is covered with this stuff. An outdoor antenna is your best bet. :)
     
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  6. dwatt

    dwatt Well-Known Member

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    Will it also affect cell phone signal strength inside the house the same way?
     
  7. TivoJD

    TivoJD Active Member

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    Cell phone signal seems fine.
     
  8. PSU_Sudzi

    PSU_Sudzi Well-Known Member

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    You could try an amplified indoor antenna to see if that works though it seems a long shot.
     
  9. Nickipedia

    Nickipedia Nick of Time

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    It can. In my house I get about 2 bars LTE, outside I get 5. Line of sight to the tower is about 600 yards away. Though there are a lot of other factors that contribute as well, this can certainly dampen them. It's like having the house wrapped in aluminum foil. It's great for energy efficiency, just not for radio waves. Houses here covered in cultured stone have the similar issue due to all the wire lath, it has a faraday cage like effect. Off course that could just be Dow Chemical...
     
  10. Teeps

    Teeps Well-Known Member

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    You are living in a Faraday Cage now.
    If you don't have line of sight from a window to the transmission tower, you are going to need an out door antenna.
     
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  11. ggieseke

    ggieseke Well-Known Member

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    FWIW, spraying thermal barrier paint on the inside of my attic decking didn't do my TV or LTE signals any good either. Aluminum makes s pretty good RF shield even when it's just microscopic particles.
     
  12. Bigg

    Bigg Cord Cutter

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    If it attenuates TV signals, it WILL attenuate cell phone signals. In the OP's case, there is probably plenty of margin on the cell phone side so it's not noticeable, but the actual signal strengths will be lower.
     

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