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  1. #1
    Join Date
    Jan 2002
    Location
    Melbourne, Aus.
    Age
    71
    Posts
    12,746

    Default Floor gap filling problem

    Hi folks, hope you can help with this one ...

    Years ago I extended a sunroom outwards. The extension was on a concrete slab butting the existing wooden floor. I levelled the slab with Ardit and surfaced all of it with cork tiles.

    Some time down the track I improved the underfloor ventilation and that led to the wood floor shrinking. There's now a gap of 4 - 5 mm between the old and new floors.

    Question is what to do.

    Is there a filler that would have

    * some elasticity
    * ability to adhere well to the vertical surfaces of the cork gap
    * be sand-able?

    Or are there other options like cutting cork infill strips?

    Thanks in advance,

    Ern

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  3. #2
    Join Date
    Dec 2003
    Location
    Frankston-Langwarrin VIC
    Age
    61
    Posts
    477

    Lightbulb Gap filler.

    G'day, Ern.

    I can highly recommend a product from HB Fuller by the name of 'Caulk In Colours.'

    This product is an excellent filler for any area where wood movement is present. It is water based, comes in many colours, easy to use, sandable and coatable.

    It will be on the shelves at Bunnings with all the Silicon types sealers.

    Also, too, and as well it's not expensive.

  4. #3
    Join Date
    Jun 2004
    Location
    upper ferntree gully, melbourne
    Posts
    14

    Default

    Dusty, how would that stuff be for filling gaps between floorboards? we have some serious (up to 5mm) gaps between a lot of our old baltic pine boards...

    cheers,
    Meaning

  5. #4
    Join Date
    May 2003
    Location
    Kuranda, paradise, North Qld
    Age
    62
    Posts
    5,639

    Default

    Meaning,
    should work fine for this but you may want to crawl underneath to back up the larger gaps with masking tape. If access is not possible you may need to push backing rod (cylindrical foam strips available in varying diameters) into the gap from above, leaving enough room over it to fill with the caulking. Otherwise you'll be there forever squirting the caulking into the gaps and watching it dissappear into the crawl space.

    Mick
    "If you need a machine today and don't buy it,

    tomorrow you will have paid for it and not have it."

    - Henry Ford 1938

  6. #5
    Join Date
    Jan 2002
    Location
    Melbourne, Aus.
    Age
    71
    Posts
    12,746

    Default

    Thanks Dusty - will give it a shot.

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