basement block walls .

I have a basement with block walls that has leaked in th past. The leaks in the past enimatedat th juction of the slab and the wall.The wall has been thoroughly scoured with a steel bush and painted with the usual sealer [drylock I think], a particularly heavy coatings have been applied to where the leaks emulated from. In over two years now there have been no more leaks.
Most of the wall is below ground level. As a belt and braces approach Iam going top redo the sealing process. ,apply plastic sheeting ,furring strips with foam insulation between and then beedboard [painted]
Question 1 Is the foam insulation necessary ?
Question 2 Does the plastic sheeting go behind the plastic or infront of it ?
Any help appreciated....mjh
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UGL isnt going to stop a leak that is at the slab-wall seam. That realy should be done with a drain tile and pump setup. Even grinding out the seam and using motar would be better than UGL - Drylock. The insulation is to save you on utilities - right. You might be best off to wait till the rains come to see if your repairs work.
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sorry about that the seam was claened out and then filled with hydraulic cement . there has been one very minor leak in 2 years now.
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