13 Comments

  1. matt gordon
    April 16, 2016 @ 3:09 am

    these videos are great. i'm not a pro, so it helps me think about things that could come up. thanks for the great videos and keep them coming.

    Reply

  2. regopit44
    April 20, 2016 @ 12:44 pm

    Fantastic video. Every homeowner and some contractors should watch this. A ton of information packed into 7 minutes. Nice job Rob #TIACREW

    Reply

  3. Franck Solow
    April 22, 2016 @ 3:02 am

    you hit the nail on the head bin in the biz for 30 plus great job

    and web site

    Reply

  4. Fernando Núñez Álvarez
    July 5, 2016 @ 10:07 am

    Your videos are great!!! I'm Spaniard, and I'm watching you from the other side of the North Atlantic Ocean, in Santiago de Compostela (northwestern SPAIN).
    You're awesome!!
    Btw I'm eager to visit Concord and the great state of Massachussetts in general.
    😉 Muchas gracias, amigo!!!

    Reply

  5. Rachel Blomberg
    March 28, 2018 @ 2:36 pm

    When drilling through floor joists for a bathroom drain (3.5" OD), how long do you recommend for making sister joists for support?

    Reply

  6. GuldeScott
    June 26, 2018 @ 4:31 pm

    This video inspired a lot of options in my project. Thanks.
    My floor joists are 2x6s. I want to run 1.5" pvc through them, but the O.D. of 1.5" pvc exceeds the 1/3rd rule. I think I will run a 2×4 or 2×6 underneath the joists, and then sister with 3/4" plywood on both sides. Then I should be able to run my DWV pipe and fit a P-trap in the floor.

    Reply

  7. Mariano S
    July 25, 2018 @ 12:17 pm

    Great information!

    Reply

  8. David Brewer
    July 28, 2018 @ 4:19 am

    Rob, thanks for the advice. You made my remodel much easier. Youre awesome!

    Reply

  9. nikfoto
    December 31, 2018 @ 3:58 am

    Would it be recommended to make an opening where two joist become interrupted?

    Reply

  10. Patrick Grimes
    January 9, 2019 @ 7:57 pm

    Great video. Thanks

    Reply

  11. Kat Westbrook
    January 23, 2019 @ 9:44 pm

    This is quite frankly hands down the most straight forward and mellow and understandable video I have watched while learning how I am going to repair the nightmare left behind from a slew of insurance sub contractors, do it yourselfers and family friends, lazy builders, a basically the derelict academy. Subfloors are no joke and this saved me. Thank you.

    Reply

  12. fuse98
    February 8, 2019 @ 7:07 pm

    Your rule of thumb for double headers connecting to adjoining joists of less than a 4' span not having to double up the adjoining joist is that only when you're dealing with 12" OC joists versus 16" OC joists?

    Reply

  13. Lee Edwards
    May 11, 2019 @ 1:48 pm

    Hi, thanks for taking the time to post your video and advice. I am from the UK and here we are allowed to drill a hole through the joists a 1/4 of the height of the joists. Can I make it bigger if I sister up with plywood as your hole looks bigger than this. Thanks

    Reply

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