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[quote=Anonymous]Of course the best way to waterproof any below-grade assembly is from the exterior or the positive side — but what if you have to work from the interior or the negative side?

https://www.waterproofmag.com/2018/04/dos-and-donts-of-basement-drainage/

If you do interior it has to be done perfectly and you have to keep it clean and operating perfectly. But I can’t get over the fact that the water is still freely getting into your structure it’s just being whisked away after it’s gone through your walls or foundation. In fact you’re drawing it in and into the drain actively through the action of the sump pump.

You should consider increased moisture and humidity that is likely from the interior solution. It’s not clear to me how installing weep holes into your wall which then drain into the interior drain which then drains into a sump pump, even if perfect, prevents mold? The interior solution doesn’t stop the water ok the outside of your walls; it drains it into an interior channel. So 🤔

It strikes me as an idea we might come to regret; like the spray foam or EIFS

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