Nashville sits in a humidity band that most cities don't experience: 35–40% in January, 80–90% in August. That 40-to-50-point swing is enough to move structural lumber noticeably — framing members expand and contract, subfloor panels shift against their fasteners, and door frames rack slightly in the opening as the seasonal load changes.
Most homeowners notice this as squeaky floors in summer and fall, and sticking doors in late spring through August. The fix for each depends on diagnosing which phase of the cycle you're in and which part of the assembly is actually moving.
Squeaky floors: the structural screw method
Floor squeaks are usually a fastener problem: the subfloor panel is moving slightly against a nail that has lost its grip, or against the joist beneath it. You can hear the nail pulling out of the wood with each step.
The permanent fix — not the temporary one — is a structural screw driven from below through the subfloor into the joist, pulling the panel tight. This requires access to the floor framing from the crawl space or basement. Where that's not available, counter-sinking face screws from above through the finish floor works on hardwood, though the plugs are visible at close range.
Squeaky laminate floors are a different problem: they're usually floating over a foam pad and the squeak is panel edges rubbing. Driving fasteners into a floating floor destroys the system. The fix is usually shimming from below or addressing the source of moisture causing the panels to cup.
Sticking doors: cutting versus adjusting
Sticking doors in Nashville can usually be traced to one of three causes: swollen wood on the sticking edge (summer, high humidity), a sagging hinge (year-round, but worsened by heat), or a shifted strike plate (frame racking).
The mistake is to plane the door to fit the summer opening. Summer is peak expansion — if you cut enough material to clear the frame in August, you will have a gap in January. The right approach is to identify the binding point precisely (slide a piece of paper around the perimeter of the closed door — where it snags is where the wood is binding), remove only the material that represents the seasonal delta, and adjust the strike plate if the latch is no longer engaging cleanly.
New construction sticking doors are almost always a hinge adjustment rather than a planing job. The frame is still settling into its first full humidity cycle and the binding point moves. We adjust the hinge leaves first; if the door still contacts the frame after two adjustments, then we measure and plane.