I have a 30 year home. At some point in the past a french drain/drainage tiles and a sump pump were installed around the perimeter of the basement. In the three years since I moved in, on three occasions I have had a puddle near one corner of the basement. I do not know where the water comes in...it does not touch any walls and the walls are dry...presumably up through a crack in the floor.
I want to finish my basement. I have spoke basement waterproofers and always get the same answer...your system failed it has to be completely replaced (new perimeter trench, new drainage tiles, etc). But I do not know if they really even think of the problem...they always seem set on a whole new system (obviously to their advantage)...i feel like i cannot get any unbiased opinion.
could a less expensive solution work...add a sump pump near where the puddle has been...add extra drainage tiles under that part of the floor leading to a new sump pump...etc
i feel that these contractors (or at least the ones I talk with) play are trying to play on my fears to get me to agree to install a really expensive new system....
my old system for the most part seems to work...i have had a puddle three time in one spot with the rest of the basement dry...mb
p.s. i have delt with contractors for other types of home work without any problem or discomfort but basement waterproofing seems much more like "a racket" with high pressure sales techniques...