- Joined
- 6 Oct 2010
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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.
Any tips welcome.
Cheers,
auto
[EDIT: stones are 25x12.5cm]
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.
Any tips welcome.
Cheers,
auto
[EDIT: stones are 25x12.5cm]