Floor Problem!

Discussion in 'Motorhome Chat' started by Goldenoldies, Jul 13, 2015.

  1. Goldenoldies

    Goldenoldies Funster

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    I have a double floor so cannot see from underneath what is happening. I have a soft area of floor in front of kitchen sink, I have removed floor covering all the ply looks good and dry, the soft area is a section along where two sheets of ply meet, about 2ft long coming away from the sink and about 1ft wide. Now I am no diy expert so was wondering if I could just cut this section out and replace it.
    My first prom would be what is under this part of floor? What if I cut through a joist? and (I am sure you will come up with other problems) how would I support the new piece of flooring in such a high traffic area. All advice will be GREATLY received.
     
  2. ambulancekidd

    ambulancekidd Funster

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    Classic floor delamination. Sika-Flex & look up instructions on line. I cant quite remember which Sika-Flex you'll need.

    Robert.
     
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  3. TheBig1

    TheBig1 Funster Life Member

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    you use a 2 part resin and inject it into multiple holes drilled in the plywood. once set the ply then bonds back to the insulation and becomes firm again. look for delamination repair kits
     
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  4. Baycott

    Baycott Funster

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  5. jonandshell

    jonandshell Funster

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    Most double floor vans have a plain plywood floor.
    The 'basement' floor is the insulated sandwich one.
     
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  6. pappajohn

    pappajohn Funster Life Member

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    Not doubting you but........In which case the op would have gone through the floor by now if its that soft and springy.....this sounds like a laminated floor.

    TB1 is correct....to treat delamination require a two part apoxy resin, a 5mm drill bit and drill, a lot of 5mm wood dowels and the patience of a saint.

    You drill a grid of holes in the floor, just deep enough to go through the top covering and not into the foam core, then inject resin into each hole in turn.
    the holes should be around 50mm apart in all directions and overlap onto good floor.

    Inject resin until it ouzes back out the hole then tap in a wooden dowel and clean off any excess resin. ( once its cured you wont get it off)
    Where its delaminated will take a LOT of resin as its filling the void not just the holes.
    repeat for all holes then place plastic film on the floor and stand a heavy flat object on the floor.
    ideally a stack of house bricks but heavy books etc would do.
    leave overnight to fully cure.

    Same procedure applies to wall delamination but drill from inside right through the foam core without puncturing the outer skin.
    you need to park next to a wall as the wall supports the wooden props needed to push the outer skin back in place.
     
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  7. Goldenoldies

    Goldenoldies Funster

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    Thanks for all the advice. Cant find out if top flooring just ply (Lunar will not talk about it) so will go along lines it is insulated.
    I have seen a lot about the green poly one shot adhesive, is this just as good as the two part resin. You use it the same but it is ready mixed.
     
  8. TheBig1

    TheBig1 Funster Life Member

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    the green poly is polyurethane based, so although it stops the delamination it remains semi flexible unlike 2 part resin. slightly more user friendly, but from my experience not quite as permanent or as good a fix
    both do the job though
     
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  9. Minxy Girl

    Minxy Girl Funster Life Member

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    I wonder if it's nothing to do with delamination at all but that you've had a water leak which has caused the area to become soft ... check the water pipes etc first before you start any major surgery!
     
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