In case it matters the hardwood was installed over a vapour barrier.
Caulking for hardwood floors.
Prep work is 90 of any job especially a paint job.
3 steps to fix hardwood floor gaps.
First the contractor who installed your floor should have leveled the sub floor within 1 8 inch over 8 feet.
I d like to use silicone caulking to fill that gap as i suspect that area to be a source of drafts.
2 insert a pry bar behind the baseboards and gently dislodge them from the wall being careful not.
However as humidity changes and the floor expands and contracts the filler may actually be forced out.
It is best to use fillers with few narrow gaps.
The hardwood flooring was installed with a 1 8 to 1 4 inch gap around the outside between the flooring and the walls i haven t installed baseboards yet.