Attic Fan or More Insulation? What Actually Cools a Lewisville Attic

Cornerstone Attic & Home Seal Solutions does not install attic fans. We install and replace attic insulation and seal air leaks in Lewisville homes, and we get asked about fans often enough to write this down. If your upstairs runs hot in summer, a fan is one answer people reach for. It may not be the right one for your attic. This page explains what a fan does, what insulation and air sealing do, and what to ask before you hire anyone.

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Fan or Insulation

Attic Fan or Insulation: What to Look at First

  • Upstairs is hot and the attic insulation looks thin or uneven

  • Drafts at the attic hatch or around lights and wiring

  • Old insulation is flattened, wet or dirty

  • Few roof or soffit vents, or signs of moisture in the attic

  • You want to add a fan

Questions to Ask Before You Hire an Attic Fan Installer

• Does my attic have enough intake vents for the fan to pull from, so it doesn't pull air out of my house instead? • Will you check for air leaks between my living space and the attic first? • How will you seal the roof or wall opening for the fan, and will it affect my roof warranty? • Is the fan on a thermostat, and what temperature does it start at? • Who does the electrical work, and is it permitted where required? • What is the price in writing, and what warranty covers the fan and the labor?

FAQs

Frequently Asked Questions about Attic Insulation and Air Sealing

Get answers to common questions about improving your home's attic system.

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Does installing an attic fan help with hot upstairs temperatures?

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How does air sealing improve my home's comfort?

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Is adding more insulation better than installing an attic fan?

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Can I improve my attic's efficiency without a fan?

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What should I consider before hiring someone for attic improvements?

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