The Preservation Trades Network and adjacent historic-trades rosters already store every plaster restoration specialist as a row: business name, member ID, plaster types worked (three-coat lath-and-plaster, gauging, ornamental run-in-place, scagliola, fresco secco), service region, project portfolio size and historic-tax-credit project experience. That tabular shape is what SleekRank reads. Instead of cloning 600 WordPress pages, you keep one source-of-truth file and let one base template render every row at /plaster-restoration/{slug}/.

SleekRank pulls the rows through a json_file or google_sheets source, then uses tag, list, selector and meta mappings to inject each field onto the per-specialist URL. The shared template carries hero, plaster types pills, service region, portfolio gallery, PHC member badge, historic-tax-credit badge, FAQ and quote CTA. A cacheDuration of 86,400 seconds keeps the directory aligned with the source roster.

Adding a new specialist is a one-line append. Retiring a retired craftsperson is a one-line delete that returns a clean 404. Editing a generic ornamental-plaster explainer takes one template change that propagates to 600 URLs at once. The directory matches the PTN roster without an editor cloning Gutenberg pages, which matters because plaster-type capability and historic-tax-credit experience drive search intent for preservation architects and homeowners.

Historic plaster restoration search is technique-specific and credential-driven. A preservation architect specifying ornamental run-in-place plaster for a National Register cornice wants specialists who actually do run-in-place (which requires a horse, a sled and decades of muscle memory), with documented Historic Tax Credit project experience confirming the documentation discipline. That shape of result is impossible to maintain by hand at 600 specialists.

Technique inventories shift as craftspeople apprentice in new methods, HTC project counts grow with every completed rehab, memberships renew on different schedules, and a hand-built WordPress directory drifts within a year. The Preservation Trades Network roster already exists in structured form, which means the public directory should be a view of that data rather than a fresh hand-curated artifact. SleekRank treats the roster as the source of truth, renders one URL per specialist, and lets editorial energy go into the surrounding chrome instead of per-page maintenance.

The directory stays current because the data source is current. The schema stays valid because LocalBusiness JSON-LD is wired once at the template level. The internal links stay intact because the parent index is generated from the same rows.

When a specialist completes their fiftieth HTC project on Monday, the badge updates by Tuesday.