Securing grid over driveway drain troughs

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22 Nov 2009
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United Kingdom
We have a long driveway on a slight slope, with 3 transverse gutters running across it at right angles to drain away surface water. These plastic gutters have slotted metal grids that fit across them as covers. The problem is: how can we fit the grids on securely? There are long screws (6 inches or so) that go through the grids, fitting into screw holes at the base of the gutters, but there's just soil beneath the gutters, so there's nothing for the screws to "bite" into. The gutters were put in when the driveway was tarmacked 5 years ago, and they held in place at first because the entry point into the plastic gutters was secure enough. Over the years, this entry point has become loose, so the metal grids are not held any more.
I can imagine squirting something through the screw holes, letting it solidify, then screwing the screws into it. But perhaps we need to lift the plastic gutters out completely, put in a bed of some sort of material that we can screw into, then lay them again.
All ideas appreciated, thanks.
 
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Just soil beneath the gutters? Is there just soil beneath the tarmac too? They should be bedded into concrete/mortar mix really.
 
The tarmac was put over a bed of compressed hardcore - so rather than "soil" I suppose the plastic drains are on top of that too. Of course we could lift them and put them into a bed of mortar or whatever but that would be a big job - they'd be likely to crack as we lifted them - so I'm looking to see if there's a different answer....
thanks
 
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I'm a beginner! What's grippy? Is there a particular brand name? I'm over in Ireland so may need to find a local equivalent.
 
get a two part chemical fix/resin fix, you'll find them at any builders merchant or hardware store and you'll need a standard silicon gun to apply.
P S this stuff sticks like **** to a blanket so when it takes theres no going back and a cheap version is good enough for what you need.
 

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