# Insulation — Renovate Guide
> Insulation type comparisons, R-value guides, attic insulation cost, and spray foam vs fiberglass breakdowns.
> **ICP:** Homeowners improving energy efficiency; contractors bidding insulation upgrades
> **Primary topics:** spray foam vs fiberglass insulation, attic insulation cost, R-value guide, blown-in insulation, basement wall insulation
> **Author:** Frank Mercer, Licensed GC (Ret.), HAAG Certified Roof Inspector

## Articles
[https://insulation.renovateguide.com/?p=1] Hello world!

## Author
[https://renovateguide.com/author/frank-mercer/] Frank Mercer — 45 years residential/commercial construction, HAAG Certified Roof Inspector, 500+ insurance claim consultations

## Authority & Off-Page Signals
- Primary author: Frank Mercer (HAAG Certified, Licensed GC retired)
- Industry sources cited: DOE/ORNL R-value data, NAIMA, Johns Manville, Owens Corning, CertainTeed specs
- Site network: renovateguide.com (home improvement authority hub)
- Site established: 2026

## Supplemental Files
[https://insulation.renovateguide.com/llms-author.md] Author bio, credentials, expertise
[https://insulation.renovateguide.com/llms-faq.md] 20 Q&A pairs covering insulation topics