Attic & Crawl Space Experts Seattle
Expert services in Seattle! Improve insulation, ventilation, and pest control. Get a free inspection today!
Your Local Specialists in Insulation, Cleaning, Mold Removal & More
Seattle homes face unique challenges—from damp weather to rodent intrusion and energy loss. At Insulation Co., we specialize in comprehensive attic and crawl space services that protect your home, improve air quality, and boost energy efficiency. Whether you’re dealing with musty smells, rising utility bills, or outdated insulation, our licensed and experienced team delivers proven solutions tailored to Seattle’s climate.


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We’re not just contractors—we’re your trusted Seattle attic and crawl space experts. Let’s make your home cleaner, healthier, and more efficient from the top down and the ground up.
– Proudly serving Seattle, Ballard, Capitol Hill, West Seattle, and beyond –
Our Services Include

Attic & Crawl Space Cleaning
Remove debris, pest waste, and contaminated materials to restore a healthy, functional space.

Insulation Removal & Replacement
Old or damaged insulation? We’ll remove it and install high-performance materials that help you save on energy.

Mold Remediation
Stop mold at its source. Our team safely removes mold & helps prevent it from returning. Protect your crawl space from moisture & mold growth.

Rodent Proofing & Exclusion
Keep pests out for good with professional sealing and cleanup. We seal entry points to keep out future rodents.
Certified Expertise
Our trained team ensures professional, reliable service every time.
Comprehensive Solutions
From attic and crawl space cleaning to insulation removal and mold remediation, we handle it all.
Certified, Licensed & Insured Professionals
You can count on us for quality workmanship, safety, and peace of mind. We also offer a 10-Year warranty!
Local Trusted Professionals
Serving the community with years of experience and a commitment to customer satisfaction.
Our happy customers
what customers are saying about us
The Benefits of Working with Us
- Improved air quality throughout your home
- Lower heating and cooling costs year-round
- Protect from mold, rodents & moisture damage
- Increased property value and energy efficiency
- Fast, reliable service with honest pricing

FREE SAME DAY QUOTE
Frequently Asked Questions
Why should I clean my attic or crawl space?
Cleaning your attic or crawl space is important for several reasons:
- Prevent Mold Growth: Dust, moisture, and debris can encourage mold growth, which can spread and affect the air quality of your home.
- Improve Air Quality: Dust and allergens can build up over time, impacting your home’s indoor air quality.
- Pest Control: Attics and crawl spaces can be a haven for pests (rodents, insects, etc.), so cleaning helps prevent infestations.
- Enhance Efficiency: A clean attic or crawl space ensures that insulation is intact and that ventilation works properly.
How do I know if I need insulation in my attic or crawl space?
If you notice any of the following, it might be time to add or replace insulation:
- High Energy Bills: Poor insulation can make your HVAC system work harder, increasing energy costs.
- Uncomfortable Temperatures: If your attic or floors above the crawl space are too hot in the summer or too cold in the winter, it could be due to insufficient insulation.
- Visible Gaps or Settled Insulation: Insulation can degrade over time or settle, leaving gaps.
- Condensation or Ice Dams: In attics, you might notice moisture buildup, which can lead to ice dams in winter or mold growth.
How do I remove mold from the attic or crawl space?
- DIY (for small areas): If the mold is limited and you’re confident handling it safely, you can clean small areas with mold-killing solutions (e.g., bleach, vinegar, or hydrogen peroxide). Make sure to wear protective gear (gloves, mask, goggles).
- Professional Removal: For larger infestations or toxic mold, it’s safer and more effective to hire a mold remediation company. They have the proper equipment and expertise to remove mold without spreading spores and causing further damage.
How do I maintain my attic or crawl space after cleaning and insulation?
Regular maintenance can help extend the life of your attic or crawl space and prevent issues:
- Regular Inspections: Check for signs of mold, pests, leaks, or insulation damage at least once a year.
- Monitor Humidity: Use a dehumidifier or make sure ventilation is working properly to keep moisture levels low.
- Check for Leaks: Inspect the roof, pipes, and walls for any potential water entry points.
- Clean Gutters: Keep gutters clear to avoid water damage to the roof and attic.
Can you insulate a crawl space?
Yes, insulating a crawl space is often a good idea, especially if it’s vented. Insulation helps maintain temperature stability and prevent moisture issues. Two common approaches are:
- Crawl Space Insulation: You can insulate the floor of the crawl space with fiberglass or foam board.
- Encapsulating the Crawl Space: For a more comprehensive solution, you can encapsulate the entire crawl space with a vapor barrier, spray foam, or fiberglass to reduce moisture and improve energy efficiency.
Do I need to worry about pests in my attic or crawl space?
Yes, attics and crawl spaces are common entry points for pests like rodents, insects, and birds. Regular cleaning and proper sealing are essential to prevent infestations. Signs of pests include:
- Droppings: Rodent droppings are often found in attics and crawl spaces.
- Chew Marks: Pests may chew on insulation, wiring, or wooden beams.
- Nests: You may find signs of nesting materials in corners or rafters.
Can poor attic ventilation lead to problems?
Yes, improper ventilation can lead to:
- Moisture Buildup: Trapped moisture in the attic can cause mold growth, rot, and insulation damage.
- Ice Dams: In winter, lack of ventilation can cause warm air to accumulate in the attic, melting snow on the roof. When it refreezes, it forms ice dams that damage the roof.
- High Energy Costs: Poor airflow can make it harder to regulate temperatures, increasing heating and cooling costs.
How can I improve attic ventilation?
Improving attic ventilation usually involves:
- Adding Vents: Install soffit vents, ridge vents, or gable vents to increase airflow.
- Using Exhaust Fans: In some cases, you might need to install an attic fan to push hot air out.
- Ensuring Proper Insulation: Ensure that insulation isn’t blocking vents, as this can trap moisture and reduce airflow.
How long does mold removal take in an attic or crawl space?
The duration of mold removal depends on the extent of the infestation and the space’s condition. It could take anywhere from a few hours to several days for a professional mold remediation team to fully address the problem, including:
- Inspection and assessment.
- Removal of mold.
- Cleaning, disinfecting, and treating affected areas.
- Repairing any moisture issues.
How can I prevent mold from coming back after removal in my attic or crawl space?
To prevent mold from returning, consider the following steps:
- Fix Moisture Issues: The root cause of mold is usually excess moisture, so it’s essential to address leaks in the roof, plumbing, or foundation. Ensure gutters are clean and functioning.
- Improve Ventilation: Proper airflow in the attic or crawl space helps reduce humidity. Add vents or fans to keep air circulating.
- Install a Vapor Barrier: Especially in crawl spaces, a vapor barrier will help keep moisture from seeping up from the ground.
- Insulate Properly: Insulation helps regulate temperature and prevent condensation, which can create a mold-friendly environment.
- Dehumidification: Use a dehumidifier in areas prone to dampness to keep the humidity levels below 60%.
- Regular Inspections: Check your attic or crawl space periodically for signs of moisture or mold growth.
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south Washinton
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- Kirkland
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- Everett
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- Auburn
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north washington
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