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  1. #11
    Join Date
    Sep 2012
    Location
    Boston
    Posts
    1,004

    Default Re: Installing HardiPlank over Existing Siding??

    what year was your house built? 1795? are you sure about that?

  2. #12
    Join Date
    Jun 2013
    Posts
    13

    Default Re: Installing HardiPlank over Existing Siding??

    1920's. That is what I am being told. Going to see for myself this morning. Will let you know.

  3. #13
    Join Date
    Jun 2013
    Posts
    13

    Default Re: Installing HardiPlank over Existing Siding??

    I saw it for myself. There is NO sheathing/plywood on the outside of the studs. What would you do now? Also, what insulation would you add? HELP!!!

  4. #14
    Join Date
    Mar 2008
    Location
    nova scotia, canada
    Posts
    1,522

    Default Re: Installing HardiPlank over Existing Siding??

    well, your going to have to strip down the old siding. .insulate teh cavitys then sheath it.. then put house wrap on then the rain screen.. it looks like you bought a money pit
    fire up the saw and make some dust

  5. #15
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    6,507

    Default Re: Installing HardiPlank over Existing Siding??

    DeniseTW,

    Now you understand why we recommended to rip and remove the existing siding in the first place:

    1. To uncover what you go there.

    2. To make repairs, to make changes and to make improvements.

    3. To bring everything up to code.

    4. To have the correct surface for the new hardiplanks.

    Costly? yes, but worth it.

  6. #16
    Join Date
    Jun 2013
    Posts
    13

    Default Re: Installing HardiPlank over Existing Siding??

    Quote Originally Posted by jkirk View Post
    well, your going to have to strip down the old siding. .insulate teh cavitys then sheath it.. then put house wrap on then the rain screen.. it looks like you bought a money pit
    Yep looks that way. What type of insulation would you use & how to install it other than the rolled fiberglass type? We are going to work on one side at a time in order to preserve the integrity of the house. Thanks for your input.

  7. #17
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    6,507

    Default Re: Installing HardiPlank over Existing Siding??

    Rolled insulation is fine. Check owenscorning.com for the R value in your area.

  8. #18
    Join Date
    May 2012
    Posts
    137

    Default Re: Installing HardiPlank over Existing Siding??

    Dow Chemicals has a "FROTH" Pak which contains the two chemicals needed for spray foam, which can insulate more fully instead of rolled insulation. And, you can do it yourself.

  9. #19
    Join Date
    Jun 2013
    Posts
    13

    Default Re: Installing HardiPlank over Existing Siding??

    Quote Originally Posted by daspyda View Post
    Dow Chemicals has a "FROTH" Pak which contains the two chemicals needed for spray foam, which can insulate more fully instead of rolled insulation. And, you can do it yourself.
    Thanks, have you ever used it? The reviews I've been able to find are less than favorable.

  10. #20
    Join Date
    May 2012
    Posts
    137

    Default Re: Installing HardiPlank over Existing Siding??

    Not yet. However, most of the pro reno shows on HGTV and DIY Network use foam in their projects and have pronounced it superior to standard insulation.

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