Residential Insulation: Your Comprehensive FAQ

What types of insulation are used in residential homes?

Spray foam, fiberglass batts, cellulose, and rigid foam boards are common options. Spray foam offers high thermal resistance and air sealing in one application.

How does spray foam insulation compare to fiberglass?

Spray foam provides better air sealing, higher R-values per inch, and improved moisture resistance. Fiberglass is less expensive but does not provide an air barrier.

What are the benefits of spray foam insulation?

It reduces energy loss, improves indoor air quality, minimizes drafts, and can strengthen walls. It also prevents moisture buildup and mold growth.

How long does spray foam insulation last?

Properly installed spray foam can last over 30 years without significant degradation. It does not sag or settle like other insulation types.

Is spray foam safe for homes with children or pets?

Once cured, spray foam is non-toxic and inert. Installation should be done by professionals, and occupants should avoid the area for 24 hours after application.

Can insulation be added to existing walls?

Yes, spray foam and blown-in insulation can be installed in existing walls through small access holes. The process requires minimal disruption.

Will insulation help with soundproofing?

Yes, spray foam and cellulose provide good sound dampening by sealing gaps and absorbing sound. Fiberglass offers limited sound control.

How do I know if my home needs more insulation?

Signs include uneven temperatures, high energy bills, cold drafts, and frequent HVAC cycling. An energy audit can provide a precise assessment.

How much does residential insulation cost?

Costs vary based on home size, insulation type, and accessibility. Spray foam typically ranges from $1.00 to $3.00 per square foot installed.

How long does it take to install insulation?

Most residential insulation projects take 1 to 2 days. Larger homes or complex areas may take longer.

What is R-value and why is it important?

R-value measures insulation's resistance to heat flow. Higher R-values mean better thermal performance, which helps maintain indoor comfort.

Does spray foam insulation require maintenance?

No routine maintenance is needed. It's durable and resistant to pests, moisture, and decay. Damaged sections should be inspected and repaired if needed.

Is insulation flammable?

Most insulation materials, including spray foam, meet fire safety codes and are treated with fire retardants. Always follow local building codes.

Can insulation lower my energy bills?

Yes, properly installed insulation reduces heating and cooling demands, which can lower energy bills by 15% or more depending on the home.

Will new insulation qualify for any rebates or tax credits?

State and federal programs may offer rebates or credits for energy-efficient upgrades. Check current local incentives for eligibility.

Can I insulate my attic without removing existing insulation?

Yes, spray foam can be applied over or under existing insulation if it is dry and in good condition. A professional inspection can confirm suitability.

What areas of a home should be insulated?

Key areas include attics, walls, crawl spaces, rim joists, basements, and around ducts or plumbing. Sealing gaps is also important.

Where is Cascadia Spray Foam of Seattle located?

We are based in Seattle, WA, and serve residential customers throughout the greater Seattle area.

What areas do you service?

Our team serves homeowners in Seattle and nearby communities throughout King County. Contact us to confirm availability in your neighborhood.

How can I contact Cascadia Spray Foam of Seattle?

Call us at (425) 386-3500 or email us at [email protected] for questions, estimates, or scheduling an appointment.

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