1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Cobbled drive jetwashed. Now: re-'grout' (I think) but with what, how?

Discussion in 'In the Garden' started by autopoiesis, 2 Dec 2019 at 1:40 PM.

  1. autopoiesis

    autopoiesis

    Joined:
    6 Oct 2010
    Messages:
    25
    Thanks Received:
    1
    Country:
    United Kingdom
    Hi all,

    Cobbled 30+ years old drive slippery due to moss/lichen now jetwashed. Much cleaner, wow!

    Quite a bit of material dislodged from between the stones per attached. My understanding is that the stones now risk becoming unstable, and best thing to do is re-'grout' them, eg by spreading sand over the stones, brushing into cracks and hosing gently.

    Is this about right? What kind of sand (fine, sharp, etc)? Any tips on method (start from top/bottom - whatever)?

    Drive sloping, and used to park car so subject to considerable forces.
    20191202_141827_Post-jetwash_Drive.png
    Any tips welcome.

    Cheers,
    auto

    [EDIT: stones are 25x12.5cm]
     
  2. Nige F

    Nige F

    Joined:
    28 Jun 2005
    Messages:
    19,984
    Thanks Received:
    1,472
    Country:
    United Kingdom
    Kiln dried sand into the cracks - then later when the weather warms , a sand stabiliser - not a shiny block sealer . No hosing. Have a look at pavingexpert.com
     
  3. Halitosis

    Halitosis

    Joined:
    7 Oct 2014
    Messages:
    181
    Thanks Received:
    30
    Location:
    West Lothian
    Country:
    United Kingdom
    As Nige says - make sure its kiln-dried and sweep it in (diagonal strokes) with a broom - on a dry day!
     
  4. autopoiesis

    autopoiesis

    Joined:
    6 Oct 2010
    Messages:
    25
    Thanks Received:
    1
    Country:
    United Kingdom
    Hi Nige F and Halitosis,
    Many thanks for the prompt responses. Is there another term for "kiln-dried sand"? In Switzerland here and can't find a direct (French) translation.

    Cheers,
    AP
     
  5. Halitosis

    Halitosis

    Joined:
    7 Oct 2014
    Messages:
    181
    Thanks Received:
    30
    Location:
    West Lothian
    Country:
    United Kingdom
    No idea what it may be called over there but it is dried in an oven (kiln) to remove all moisture content. If they have block paving or driveways over there then I’d expect it to be common and available from most DIY warehouses or builders merchants. Should come in 25kg sealed bags to stay dry
     
    • Thanks Thanks x 1
  6. Ian H

    Ian H

    Joined:
    14 Sep 2010
    Messages:
    5,716
    Thanks Received:
    622
    Location:
    Rochdale
    Country:
    United Kingdom
    Silicone sand maybe?
     
Loading...

Share This Page