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Explainers
Home Insulation Explained — Types, How It Works, and What to Look For
These explainers cover the fundamentals of home insulation — from fiberglass and rigid foam to spray foam and reflective insulation — so you understand how each type works and what specs matter before making any decisions.
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Featured Insulation Explainers
Start with the foundations, then zoom into specific insulation types. These featured explainers clarify how each works, what it’s best at, and how to choose the right one for your needs.
All Explainers
All Insulation Explainers
This is the complete Insulation explainer library — fundamentals, types, features, and material-specific guidance. Browse every article in one place, or use the sections below to narrow your focus.
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Insulation Explainers by Type
Jump straight to a Insulation type to explore all explainers inside it — how they work, key specs, and when to use each.
Explainers
Learn how fiberglass insulation works, its batt and loose-fill forms, R-values, and where it's used.
Explainers
Understand how reflective insulation blocks radiant heat, its foil-faced forms, and best applications.
Explainers
Explore rigid foam board types — EPS, XPS, and polyiso — and how R-value and moisture resistance vary.
Explainers
Understand open-cell vs. closed-cell spray foam, how each seals and insulates, and where each fits.
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Ready to move from understanding insulation to choosing one? Explore our top picks, narrow options with comparisons, or go deeper with hands-on reviews.