Installing drain to daylight and a sump? – GreenBuildingAdvisor

Our foundation was recently dug and 8” clear stone put down as a base prior to footings. From here, the footings will be made using form-a-drain and the plan is to have two drain to daylight exits (it is a breezeway home with one side slab on grade and the other a short finished basement. So a drain to daylight is planned on each end of the north side of the home. After excavation, we found the granite bed under parts of the home is right at the surface of the excavation elevation. We added the 8” of clear stone as a base over the site, but with heavy rains, perched water will still rise above that and make the drain to daylight in use constantly. I’m wondering if we should also have a sump installed in the finished short basement side? Maybe not even hooking it up yet but at least having it installed just incase we need it? Our contractor said it would be an additional hole that would draw water to the area, but I’m wondering if it would actually help to keep the water level lower than the form-a-drain footings and drain to daylight? That way incase of torrential rains and fast water table rise we wouldn’t have a rose of water in the basement?