Location: Oregon
Contractor: Custom Home Builder
Project Cost: $575k (1,500 sq ft addition, ground-up build)
I hired a custom builder for a full 1,500 sq ft ground-up addition. His framing crew framed the structure, and his own direct employees did the luxury vinyl plank (LVP) installation.
After noticing excessive squeaking and dips as I walked, I checked the floor with a straightedge. Across several 10-foot spans, I'm measuring as much as 1/2" of deflection / dipping.
The manufacturer installation guide explicitly states the subfloor must be flat within 3/16" over a 10-foot radius, so the current state is more than double the allowable tolerance, and (I think) voids my product warranty.
Is it unreasonable or outrageous to expect the builder to pull the LVP back up, properly prep/level the subfloor (grinding high spots / pouring self-leveler), and reinstall?
What is the best way to handle this conversation with him without completely putting him on the defensive?
Any specific technical red flags I should watch out for if they try to offer "quick fixes" instead of a proper tear-out and leveling (example: I know they put down tar paper in a few low spots already, I feel like paper is a questionable long term fix).