2018 TAB 400 floor repair idea.

ETRADIOETRADIO Member Posts: 6
edited December 2023 in Modifications & Upgrades
After experiencing a soft spongy floor along the most traveled areas of the trailer, I have an idea, why can’t I just take a razor knife and cut along the base and remove that and use it for a template to lay down marine plywood and install a floating vinyl floor system on top of that. Is there anything that would prevent me from doing this? And does anyone have a picture of what that floor looks like with the top floor material removed? Has anyone removed the underbelly cover on a 2018 Tab 400? Maybe I can at lease check the subfloor areas for water intrusion while I’m under it, and possibly address the floor issue from below and weatherproof the underbelly with some tank heaters and insulation. 

Comments

  • Denny16Denny16 Member Posts: 5,445
    @ETRADIO I had the floor replaced on our 2018 TaB400, here is what the floor looks like under the Infinity flooring

    This is the new seal layer installed over the Greencore subfloor, next a new Azdel panel is glued to this and a new Infinity floor covering installed.  To see the process, go to https://tab-rv.vanillacommunity.com/discussion/11153/tab-400-floor-replacement
    cheers
    2018 TaB400 Custom Boondock,  Jeep Gladiator truck, Northern California Coast.
  • ETRADIOETRADIO Member Posts: 6
    2018 TAB 400 FLOOR REPAIR : UPDATE MARCH 28th 2024 

    We have begun our removal of the foam from the floor, we are down to the AZDEL, the soft spots are not what we expected, there is no water damage discovered at this point. The idea of using the removed rubber flooring covering is working out perfectly. I will be posting pictures soon. 
  • ETRADIOETRADIO Member Posts: 6
    UPDATE: March 31st 2024
    Okay Folks, a few months back I told you that my wife and I were going to replace the floor in our 2018 TAB 400. A lot of you said it can’t be done. First “IT MOST DEFINITELY CAN BE DONE.” You have to have very sharp razor knives, a small pry bar, pliers, rubber ballot and a 7 in 1 tool. First we cut the rubber mat out from the floor and removed it in one piece so that we can use that for our pattern for the new 3/4 inch marine plywood floor that we are putting down, then we removed the first layer of Azdel, there’s 2. We discovered that the soft spots in the floor is actually a HUGE DESIGN FLAW! They use these odd shaped inserts to go inside the spaces of the floor frame and sandwiched between Azdel, (they’re screwed in from the sides but….What happens is that this (Brilliant Idea) works for a couple of years until the inserts begin to fail, this cause the inserts to sink down to the bottom section of the Azdel giving you a soft spot, we discovered that the whole floor is done like this. We will post the entire job when completed, right now we will post what we’ve done so far. When we get through with this floor, you’ll be able to jump from a second-story building onto the floor of our camper and the only thing that will happen is you’ll break your legs way before you break this new floor! Cheers! 
  • Denny16Denny16 Member Posts: 5,445
    If you put plywood down on the floor, you are going to need to increase the gap on the bottom the the rear and galley cabinets to maintain the Alde return air flow.  Our factory repaired floor did not include adding plywood, just removing the Infinity flooring, adding a replacement Azdel panel over the Greencore that caused the soft spots and a new moisture barrier and Infinty flooring added on top.  No more soft spots or floor issues.
    Cheers
    2018 TaB400 Custom Boondock,  Jeep Gladiator truck, Northern California Coast.
  • ETRADIOETRADIO Member Posts: 6
    actually, I will adding additional air flow for the Alde System. The floor did not fail because of greenboard, our failed because of poor craftsmanship. The idea was to save weight, the cross beams are to far apart to provide support after several years of use. but I have the remedy, I have done other floor systems and it seems that all RV craftsmanship suffer in one way or another.
  • ETRADIOETRADIO Member Posts: 6
    UPDATE: 
    Floor cut and laid, Now the next steps will be to add the additional crossbars and screw the floor down, we will be adding commercial grade carpet squares to the top. Easy to maintain and replace if needed, the floor will be easy to repair if needed, since I now have a complete template. There’s nothing complicated about doing this if you have experience in wood work and RV maintenance. I’ve been doing this for 40 plus years, I would recommend taking it to a professional if you are not experienced. We have 8 hours into this, by the time we finish the project I would say it takes about 24 hours all together and about $300.00 worth of materials and some time.
Sign In or Register to comment.