Original directory research · Recalculated hourly
The Chimney Directory Evidence Lab
A transparent look at what the directory records contain—and what they do not. This is coverage analysis of our dataset, not a census of the US chimney industry or a scorecard for individual companies.
Completeness signals
How much comparison context is recorded?
These percentages measure whether a field exists in the feed. They do not verify that the information is current or establish provider quality.
Recorded service vocabulary
Most frequently represented service categories
Each service is counted at most once per company record. Categories may overlap and do not confirm current capability.
Rating-source coverage
Sources attached to usable rating records
A source name identifies the recorded reputation context. It does not make collection methods comparable across platforms.
- Yellow Pages1,224
- third-party directory2
Reproduce the interpretation
Research method and limitations
- Load the same paginated directory feed used to generate public company pages.
- Validate rating, review-count and source fields using the published rules.
- Count each recorded service once per company.
- Report missing fields as unknown, never as failed qualifications.
- Recalculate after the directory cache refreshes.
Newest parseable company-record timestamp in this snapshot: September 22, 2026. This is a record timestamp, not a review or credential verification date.
Use the research correctly
Move from aggregate coverage to a property-specific decision.
Open a company record, verify the original source, define the required service and use a written scope. National field coverage cannot choose a contractor for you.