Built Around the Existing Structure
Two Housing Stocks, Two Different Problems
Up around the Center and on Chequessett Neck the houses are old enough to have board subfloors and plaster, framing that settled generations ago, and bathrooms carved out of rooms that were never bathrooms. The floors there are rarely level and almost never stiff enough for stone without help.
South Wellfleet and the necks are the opposite problem. Those houses are newer and straighter, but many were built as seasonal cottages with light framing, wide joist spacing and minimal insulation. A floor like that can look perfect and still move more than ceramic tolerates.
Both end the same way if the preparation is skipped. The tile is not what breaks, it is the bond layer and then the waterproofing, and on the Outer Cape the first sign is usually a smell or a soft spot rather than a crack.
That is why a Wellfleet quote comes after we have been in the room. Deflection and framing are checked first, the shower is built on Schluter Kerdi-Board, which is waterproof through the panel rather than coated, and a bonded membrane is detailed over every seam, corner and curb on top of it.
An antique house and a summer cottage need the same two waterproof layers for completely different reasons.