Why Air Sealing Is More Important Than Insulation Alone

Insulation slows heat transfer — but it doesn’t stop air movement.That’s where air sealing comes in.

Why Air Sealing Matters More Than People Realize

Most homes leak a significant amount of air through gaps in the attic floor, walls, and mechanical penetrations. Insulation alone cannot stop this airflow.

Benefits of Air Sealing

• Prevents drafts

• Stabilizes indoor temperatures

• Reduces moisture movement (a big cause of condensation and mold)

• Improves indoor air quality

• Boosts insulation performance (insulation works best when air isn’t blowing through it)

Why Air Sealing + Insulation Works Best

This combination creates a true thermal envelope.Air sealing closes the gaps; insulation adds resistance.Without sealing, insulation becomes far less effective.

If you want the biggest impact on comfort and efficiency, air sealing should always come first.