How much blown-in insulation do I need for my home?

• <div><p>The amount of insulation you need will vary depending on where you live. <a href="https://www.energystar.gov/campaign/seal_insulate/identify_problems_you_want_fix/diy_checks_inspections/insulation_r_values">Energy Star</a> recommends certain minimum insulation values in different geographic regions. In most cases, however, even adding a little insulation is better than not adding any.</p></div>

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Q: What foam insulation has the highest R-value?

• <div><p>Polyisocyanurate foam, or polyiso for short, has the highest R-value per square inch: 6.5 to 6.8. Polyiso is a rigid foam that comes with a reflective foil on both sides to serve as a radiant barrier. Given its high R-value, rigid foam is usually meant for foundations and basement walls.</p></div>

Q: Do doggie doors let hot air in?

• <div><p>Yes, doggie doors, like all entrances, can let both hot and cold air into your home. However, as with any door in your house, you can take steps to weather-strip your pet's entrance to prevent air leaks. </p></div>

Q: What's the best R-value for installing insulation in a home?

• <div><p>The best R-value for home insulation depends on where you live and where you&rsquo;re installing the insulation. Your climate zone plays the biggest role in determining the correct R-value, so be sure to know which zone you live in when determining the R-value you need.</p></div>

Q: What maintenance is suggested for attic insulation?

• <div><p>Periodic checks for moisture or pest issues ensure consistent performance.</p></div>

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Insulation questions, answered by experts

The amount of insulation you need will vary depending on where you live. Energy Star recommends certain minimum insulation values in different geographic regions. In most cases, however, even adding a little insulation is better than not adding any.

Polyisocyanurate foam, or polyiso for short, has the highest R-value per square inch: 6.5 to 6.8. Polyiso is a rigid foam that comes with a reflective foil on both sides to serve as a radiant barrier. Given its high R-value, rigid foam is usually meant for foundations and basement walls.

Yes, doggie doors, like all entrances, can let both hot and cold air into your home. However, as with any door in your house, you can take steps to weather-strip your pet's entrance to prevent air leaks.

The best R-value for home insulation depends on where you live and where you’re installing the insulation. Your climate zone plays the biggest role in determining the correct R-value, so be sure to know which zone you live in when determining the R-value you need.

Periodic checks for moisture or pest issues ensure consistent performance.

The Harris, MI homeowners’ guide to insulation services

From average costs to expert advice, get all the answers you need to get your job done.

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