Probably need a flooring expert to answer this one...
I had an interior drain tile system with sump pump installed in my basement. That system involves a pipe with a "lip" that is cemented into place so it presses against the concrete wall. The concept being that if the walls leak at all it will catch the water and let it flow into the drain tile system below.
SO, my question is about the laminate floor I'm about to install. I see you are supposed to allow 1/4" on the edges of the room for expansion. I'm wondering if I need to put 1/4" spacers against this lip OR if the plastic drain tile lip will be "give" enough to allow for expansion safely. It would be a lot easier if I didn't have to install the spacers just because then I'd have to shim the baseboards off the wall to make sure they cover the edge of the flooring (even with quarter round on the bottom).
I've included two pictures, one with descriptions so it makes more sense. Again, the lip is plastic and a little flexible...but of course I don't want to break it with overexpanding laminate flooring. The second picture is a close up of the lip.