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Structural issues.

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  • Section62 said:

    Your bounciness might just be that the joists are a bit under specced for the span.  

    Difficult to tell from the picture alone, but to me they look newer and cleaner than I'd expect from the condition of the brickwork, and they also look quite widely spaced.

    I wonder whether someone has redone the floor and just used off-the-shelf 4x2(?) rather than matched the original section, and has also opened up the spacings a bit to save a fractionally on materials cost?

    Without seeing the full span it isn't easy to tell. But it doesn't feel like a PPI job to me.
    Hmm Interesting! I wonder if it might be worth closing the spacing by adding some more timber or just leaving as is for now. Sorry for the question but what do you mean 'PPI job'? 

  • Section62
    Section62 Posts: 9,696 Forumite
    1,000 Posts Fourth Anniversary Name Dropper

    Hmm Interesting! I wonder if it might be worth closing the spacing by adding some more timber or just leaving as is for now.


    It depends whether that's the cause of the problem, and how bad you feel it is.  Most suspended floors have a bit of 'bounce'...

    If there's space to crawl under the floor it should be possible to add some extra joists (if needed), or do some doubling up.  But it is filthy uncomfortable work and won't be enjoyable/cheap.

    Personally unless I felt unsafe I'd leave it for now.  The timber looks new and in good condition, so it isn't likely to suddenly fail as it might if they were old and rotten.


    Sorry for the question but what do you mean 'PPI job'? 

    'Put Plenty In' - old school structural design where you worked out roughly what you needed, then added a bit more until it looked right. Structural calculations were time consuming and expensive, materials were cheap, so it made sense.

    Somewhat done away with by computers and building regulations, but the the appearance of the brickwork suggests it dates from  well before those times... so I'd expect to see more timber in there (i.e. than you might on more modern work now that economy in material tends to be king).

    But it does still live on in craftspeople who have a feel for the job they are doing, and know almost instinctively how to do it without the need for a computer printout pdf.
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