Is sealing air leaks more important than adding insulation?
Verdict: YES — Yes — air sealing always comes first. $500 in sealant routinely outperforms $3,000 in extra insulation.
Cost & payback at a glance
| Typical cost range | $300–$800 |
|---|---|
| Estimated annual benefit | $285/yr |
| Simple payback | ~2 years |
| System | insulation |
| Scenario | general |
How HomeScore decides
HomeScore evaluates "is it worth it?" decisions across 40+ home systems using 2026 cost data, regional installer rates, lifespan modeling, and resale ROI. Every verdict on this page is anchored to the underlying replacement cost, annual operating savings, and the scenario you're in: general homeowner, in-2026 pricing, resale-driven, forever-home, or pre-1980 retrofit.