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Green Building Bible, Fourth Edition
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    • CommentAuthorjemhayward
    • CommentTimeApr 11th 2018
     
    The house has been there for at least 500 years. In that time the road level at the front has risen by (at a guess from looking at old photos) by about 4ft. At the rear the garden (which is not ours, but next doors) has been built up, and that was last done about 20 years ago, but the original alteration was probably 200yrs ago or earlier, and at the time the house next door was under same ownership as our house was. I think the opportunity for litigation passed some time ago.
    Our current thinking is to create a French drain 1m deep at the back to divert the run off from next doors garden, and our thatch, and run that away into a drain. At the front we will create a light well, and expose the coal chute / window.
    I doubt that we will find the drain, and if we do, I doubt it will be working as the road is between us and the drains.

    So, the plan is to reduce the amount of water hitting the back wall, and let what does get through flow under the floor to a sump, and then pump the water from the sump back under the floor in pipes, and outside to the drain.

    I don't think we will achieve 'dry' but I think we can achieve 'not too damp' which is basically what the rest of the house is.
  1.  
    Would suggest using some drain dye in your cellar in the existing drain. You may be pleasantly surprised that the drain still exists under the road and just needs the ditch that it runs into cleaning out.
  2.  
    Posted By: jemhaywardbut the original alteration was probably 200yrs ago or earlier, and at the time the house next door was under same ownership as our house was. I think the opportunity for litigation passed some time ago.

    Errr - yes!

    Posted By: jemhaywardOur current thinking is to create a French drain 1m deep at the back to divert the run off from next doors garden, and our thatch, and run that away into a drain. At the front we will create a light well, and expose the coal chute / window.

    Yes, much better to give the water an alternative to getting in the cellar rather than pumping it out afterwards. I would be inclined to do the french drains and the window first work and wait and see before putting in a sump and pump
    • CommentAuthorjemhayward
    • CommentTimeApr 12th 2018 edited
     
    Posted By: Peter_in_Hungary
    Yes, much better to give the water an alternative to getting in the cellar rather than pumping it out afterwards. I would be inclined to do the french drains and the window first work and wait and see before putting in a sump and pump


    We need to dig some form of sump, anyway, for radon mitigation, and we also have a pump, so I think we may as well do it anyway, as the original design is obviously a 'wet floor' to drain, and we may want to wash the floor enthusiastically one day!!!

    We're now thinking of putting some drainage pipework in the soil to divert any water ingress at the rear towards the sump, then a radon membrane, then geotextile, then geocell foamed glass (as water can flow through this, if necessary), then geotextile, and a layer of sand to bed the flagstones in, and hopefully gain an inch or two of extra headroom in the process. But, plans may change, as they seem to daily at the moment.
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