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Ensure that they're building it on a slab of concrete at least 3"/75mm thick, falling slightly towards wherever you're sending the surface water. If its going right up to the house the finished surface should be a minimum of 4"/150mm below your damp proof course. This way you'll get no root problems OR give your house damp problems.
ColinTheBald
@hugo7
Also thoughts on this...
We've booked our patio in for jubilee week/weekend.
The raised beds are going, but we're keeping the bay inset into the patio.
It'll probably come up a course of bricks on the raised bed as you're looking at it now. And the soil doesn't go all the way up on the inside.
Obviously I don't want to do extra work I'm paying for, but is it worth me knocking out the bit of the bed around the bay now: a. to give more time to adjust. b. to get a better idea of how it'll look in advance?
I think I've answered my own question.
Also is there any extra precautionary stuff I can ask the builders to do to stop slabs getting lifted by roots and shoots etc?
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