How hard is it to replace fence panels?

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Our fence is rotting and falling apart. I'm debating whether to get a handyman/gardening firm to replace the panels or try to do it myself. I have no idea how big a job it is though. The posts are all ok (solid concrete posts) and it looks like the panels just slot in but I'm wondering if there's more to it than that. Any tips from anyone who's done it would be appreciated. TIA.

2 person job but dead easy. Reason I say 2 person is because of the weight of them. Just slot them in like you guessed. Also, if you can, paint them before you put them in on the side where the slats point up IYSWIM, then if your neighbour paints their side it won't run through your side.

If you need to slot them out/in you need to be tall or have a second person to hand it up to you while you are on a ladder.

The fence posts are the hard bits of putting a fence up. Replacing the panels is fairly easy. Try to find some tall people to help.

Thanks. Sounds like it's doable then....if I can rope some very tall family members in to it!