What Insulation Do I Need?
Answer 5 quick questions and get personalized recommendations for the best insulation type, estimated costs, and next steps for your project.
Where do you need insulation?
Select the area of your home you want to insulate.
How We Make Our Recommendations
Factors We Consider
Our quiz algorithm weighs multiple factors to recommend the best insulation for your specific situation. Here's what goes into our recommendations:
Location in Home
Different areas require different insulation types. Basements need moisture resistance, attics need the highest R-values, and walls have space constraints.
Climate Zone
Cold climates (zones 5-8) require higher R-values and benefit from air-sealing spray foam. Hot climates (zones 1-3) may benefit from radiant barriers.
New vs. Retrofit
New construction allows easy batt installation in open cavities. Retrofit projects often need blown-in or injection methods to fill closed walls.
DIY vs. Professional
Some materials like batts and loose-fill are DIY-friendly. Spray foam requires professional equipment. We only recommend what you can actually install.
Quick Overview: Insulation Types
| Type | Best For | DIY? | Cost |
|---|---|---|---|
| Fiberglass Batts | New construction walls, accessible attics | Yes | $ |
| Blown-In Cellulose | Attic floors, retrofit walls | Yes | $ |
| Mineral Wool | Fire-rated walls, soundproofing | Yes | $$ |
| Spray Foam (Closed) | Basements, crawl spaces, cold climates | No | $$$ |
| Rigid Foam (XPS) | Below-grade, foundations, high moisture | Yes | $$ |
| Radiant Barrier | Hot climates (zones 1-3), attics | Yes | $ |
Always Meet or Exceed Code
Our recommendations are based on IECC code minimums, but going above code often makes sense for energy savings and comfort. Check local requirements — some states and jurisdictions have higher standards than the model code.
Related Resources
R-Value Calculator
Find required R-values for your climate zone.
Cost Calculator
Estimate material and installation costs.
R-Value Chart
Complete reference for all insulation types.
Types of Insulation
In-depth guide to all insulation materials.
Climate Zone Map
Find your IECC climate zone.
Thickness Calculator
Calculate required insulation depth.
Frequently Asked Questions
How accurate are these recommendations?
Our quiz provides solid starting points based on building science best practices and IECC code requirements. For complex projects or unusual situations (historic homes, moisture issues, extreme climates), we recommend consulting with a local insulation contractor or energy auditor.
Can I combine different insulation types?
Yes! Hybrid approaches are common. For example, 2" of closed-cell spray foam for air sealing + fiberglass batts to fill the rest of a wall cavity. Or radiant barrier on the attic roof deck + blown-in cellulose on the attic floor. Combining materials can optimize both performance and cost.
What if I'm still not sure which to choose?
Start by reading our detailed guides for your specific location (attic, walls, basement, etc.). Then get 2-3 quotes from local insulation contractors — they can assess your specific situation and provide material recommendations. Many offer free estimates.
Should I prioritize R-value or air sealing?
Air sealing often provides more bang for your buck than adding R-value alone. Many experts recommend addressing air leaks first. Spray foam does both — it insulates and air-seals. For batt or loose-fill insulation, separate air sealing (caulk, foam, weatherstripping) is essential for maximum effectiveness.