Insulation Co. LLC

What we do

Insulation Co. LLC is a Seattle-based insulation contractor specializing in crawl space cleaning and insulation, attic cleaning and insulation, vapor barrier installation, rodent proofing, and energy efficiency upgrades. We serve homeowners throughout the greater Seattle area. Licensed, bonded, and insured.

261 five-star reviews

A 5.0 rating on Google with over 261 reviews is the result of doing the work right, every time. Our customers consistently describe fast scheduling, thorough work, clean results, and honest pricing. Those reviews come from real Seattle homeowners, not a marketing campaign.

Why it matters

Crawl spaces and attics are the most overlooked parts of a home. They are also where moisture, mold, pests, and energy loss quietly do their damage. Addressing insulation and air sealing properly protects your home's structure, improves indoor air quality, and reduces what you pay to heat and cool it. We do this work the right way so you do not have to think about it again.

What to expect

• A free estimate with a clear, upfront price -- no pressure, no surprises.
• A crew that shows up on time and communicates clearly.
• Thorough work with attention to detail in spaces most contractors rush through.
• A clean workspace when we leave.
• Honest recommendations -- we tell you what your home actually needs.