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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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    • CommentAuthorOIMO
    • CommentTimeAug 30th 2007 edited
     
    We need to replace the driveway outside our Victorian red brick semi. It is currently a mixture of crazy paving down each edge for approx 1m wide, then 2'x2' Concetre Slabs in the centre providing parking for two cars, finally between that and the tarmac pavement is a 1m wide section of a different tarmac.

    The crazy paving looks nasty, the tarmac to the pavement has sunk on one end and the paving slabs are loose having been driven over by various flat bed trucks etc during our renovation works. Having lifted one of the slabs I have discovered it is sitting on bare earth and it was seemingly just the cement mortar around the edges that was holding them in place. Now that this has started to break up in a few places water is getting under them and they are unstable.

    Can anyone suggest a cost effective yet relatively green replacement drive? We have ruled out grass grid as we think it will look odd in front of a formal red-brick Victorian house and caged gravel too as we have a tiled hall floor that will not appreciate gravel getting walked in. We could easily put in a slope away from the house out onto the pavement and road, but would rather use SUDS of some sort. Two final points, our mains electricity comes in under the drive at a depth of around 12" and there is a cellar grate set in the drive immediately outside the front bay window.

    Any suggestions and guideance gratefully received.
    • CommentAuthortony
    • CommentTimeAug 30th 2007
     
    Road plannings? They set pretty hard after a while but are recycled stuff.
  1.  
    At the Energy Centre (see www.syec.co.uk) we used recycled concrete block paviors. My view is that if you have to use concrete, then second-hand is good! And there is also the advantage that by the timew you buy them second-hand, they will probably have faded as much as thy are going to, so you don't end up with a disappointingly greyish-red drive.

    Nick
  2.  
    I guess the green option is to sell the cars and turn the forecourt back into a garden.
    • CommentAuthorOIMO
    • CommentTimeSep 9th 2007 edited
     
    Thanks all...sorry for the pause I have been on holiday (in the UK before you ask Chris!)

    Tony> I have not come across Road Plannings before, I presume the are created when the remove an existing road surface? Please can you point me to a source or link to more information, I seem to be struggling to Google for them?

    Nick> That sounds like an interesting idea, but how do you address the SUDS drainage issues? I did not think they were porous.

    Chris> Not a realistic option unfortuntately.

    I have also read about porous paving of various types, has anyone used any of them?
  3.  
    2 tracks approx 600mm wide for the cars, and a grass belt in the middle. If you want more 'serious' drainage, then dig a trench in the middle (avoiding the elec supply, of course!), fill it as a soakaway, and plant grass back on the top. If you do use block paving there's a really informative site called www.pavingexpert.com. Nick
    • CommentAuthortony
    • CommentTimeSep 9th 2007
     
    Try recycled materials from an aggregate supplier/waste disposal company for road plannings
    • CommentAuthorOIMO
    • CommentTimeSep 9th 2007
     
    Nick, unfortunately that approach will not work for our drive. The access only one car width and located in the centre of the drive, you then either come in to the left or to the right to fit two cars in or more centrally if only one car present and you wish to leave greater pedestrian access space.

    However you raise an interesting point, i.e. does it *all* need to be paved in some way. Perhaps softer edges would help the drainage issue.
  4.  
    Could you re-lay the slabs, on a proper bed of compacted hardcore then sand and cement, adding a few more from a reclaimer if necessary? Cover the area you need for parking and access then plant up the edges. Put a drainage gully at the entrance to catch the run off and lay it with a fall to a gravel soakaway at one side hidden within the flower beds. Failing that, would it be worth hiring a mini crusher for a day and crushing all your slabs and crazy paving etc on site rather than skipping it all?
  5.  
    If my vision of your description is right, then a 'railway points' sort of layout would maybe work? Fall everything to a permeable middle or edges and, effectively, a French drain.
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