The Charleston Lowcountry and York County on the South Carolina side of the Charlotte metro, across Berkeley, Charleston, Dorchester, Lancaster and York counties. Each town below has its own permit authority and its own housing stock, and both change what the work involves.
The Lowcountry moves everything you put on a floor. Humidity swings, a high water table and raised foundations mean the same product behaves differently here than in a dry climate.
Charleston County · City of Charleston
Charleston County · Town of Mount Pleasant
Charleston County · City of North Charleston
Dorchester County · Town of Summerville
Berkeley County · City of Goose Creek
Berkeley County · Town of Moncks Corner
York County · City of Rock Hill
York County · Town of Fort Mill
York County · Town of Clover
York County · City of York
Lancaster County · Lancaster County
Solid hardwood is the material that cares most. Wood takes on and gives up moisture with the air around it, and in a climate this humid that means real seasonal movement — which is why acclimating the material in the room before installation is not a formality, and why installers who skip it produce gaps in February and cupping in August.
Foundation type changes the answer. On a slab, moisture comes up through the concrete and a vapour barrier or a moisture-tolerant product is the sensible route — which is much of why luxury vinyl plank has taken over so much of this market. Over a raised crawl space, what matters most is what is happening underneath: an unencapsulated crawl space pushes moisture into the subfloor year-round, and no floor covering fixes that.
Tile stays dimensionally stable through all of it, which is why it remains the default in Lowcountry bathrooms and increasingly through main living areas.
Flooring is decided by the subfloor, and the subfloor question is different at each end of our area. A raised house over a crawl space takes its moisture from underneath: humid air in the crawl space reaches the underside of the subfloor, the boards end up wetter below than above, and they cup. Replacing the floor without dealing with what is under it buys the same fault on a new floor.
Over a slab the question is the slab itself. Concrete holds water long enough that what it reads today is not what it reads after a wet fortnight, so a moisture test precedes the specification rather than following the complaint. Either way the material choice comes second: tile and quality luxury vinyl plank are the most forgiving, engineered timber is a reasonable middle path, and solid hardwood is the least forgiving and entirely possible when it is acclimated properly and laid on something dry.
A floor replacement is not usually permitted work in any of the towns above.
Between them, the towns above fall under 11 separate permit authorities.
In the Lowcountry, permits come from the City of Charleston for Charleston, the Town of Mount Pleasant for Mount Pleasant, the City of North Charleston for North Charleston, the Town of Summerville for Summerville, the City of Goose Creek for Goose Creek and the Town of Moncks Corner for Moncks Corner.
In York and Lancaster counties, from the City of Rock Hill for Rock Hill, the Town of Fort Mill for Fort Mill, the Town of Clover for Clover, the City of York for York and Lancaster County for Indian Land.
It matters on a floor only when what is underneath turns out to be structural or a plumbing failure, at which point the office covering the address becomes relevant rather than academic.
What can be permitted is what is found underneath — joist or subfloor repair that turns structural, or a plumbing leak that has been feeding the problem. Those go to the licensed trade concerned, who pulls the permit in their own name.
Because the moisture it sees is different. A floor over a vented Lowcountry crawl space and the same floor over a dry slab are in two different environments.
The product data sheet assumes conditions that have to actually be true.
On a slab, yes. On a raised house we want to see the crawl space before specifying anything, and we will say so if that is the real job.
Yes, and it is the step most often skipped when a job is rushed. Material sits in the room it is going into, with the house conditioned, for days rather than hours.
It is the reason a floor that looked perfect in March opens up in August.