LOCAL · SEO GLOSSARY
Window Fitter Schema Markup
HomeAndConstructionBusiness schema for window fitters — hasCredential FENSA registration and GGF membership; serviceType array for all window, door, and glazing product types; areaServed.
Definition
Window fitter schema uses schema.org HomeAndConstructionBusiness: (1) hasCredential: EducationalOccupationalCredential for FENSA Registered Installer (recognizedBy FENSA, url fensa.org.uk), GGF Member (recognizedBy Glass and Glazing Federation), CERTASS registration if held; (2) serviceType: array of all offered products/services ("Replacement uPVC Windows", "Aluminium Windows", "Timber Sash Windows", "Bifold Doors", "Sliding Doors", "Composite Front Doors", "Conservatories", "Orangeries", "Roof Lanterns", "Roof Lights"); (3) telephone in E.164 format; (4) areaServed: county or multi-county coverage (window fitters typically cover 20–40 mile radius); (5) openingHoursSpecification; (6) aggregateRating once reviews established.
Why it matters for SEO
FENSA in hasCredential with the recognizedBy link to fensa.org.uk creates a machine-readable cross-reference between the schema claim and the public FENSA register. Google and AI systems can validate FENSA membership status against the public register — the same verification a homeowner would perform. This is a stronger E-E-A-T signal than a text mention alone.
How DeepSEOAnalysis checks this
DeepSEOAnalysis parses HomeAndConstructionBusiness JSON-LD for window fitting sites, validates hasCredential entries for FENSA registration, checks serviceType completeness, and verifies areaServed and telephone format.
Useful tools and resources
GLOSSARY
Related terms
local
Window Fitter SEO
SEO for window fitters and double glazing installers — FENSA registration (publicly verifiable, mandatory for building regs compliance), CERTASS, GGF membership, BFRC energy ratings, service-specific pages by window type and material, HomeAndConstructionBusiness schema.
Read definition →local
FENSA Window Installer SEO
"FENSA registered window installer [city]", "FENSA certified windows [city]" — buyers searching for FENSA-registered installers are pre-qualified; FENSA certification is publicly verifiable at fensa.org.uk and required for building regs compliance without a separate council application.
Read definition →local
Window Fitter E-E-A-T Signals
FENSA registration (public register, building regs compliance), CERTASS, GGF membership (consumer helpline, code of practice), BFRC Window Energy Rating accreditation, and Secured by Design for security glazing as E-E-A-T signals for window fitters.
Read definition →structured data
Structured Data
Machine-readable annotations added to HTML — usually JSON-LD — that explicitly describe what a page is about to search engines and AI systems.
Read definition →onpage
Local SEO
SEO optimisation for location-based search queries — ensuring a business appears in Google\'s local pack and map results for "near me" and city-specific searches.
Read definition →See how your site scores on Window Fitter Schema Markup.
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