Attic Cleanup
Attic Cleanup & Sanitation in King & Snohomish County
Complete attic restoration after rodent infestation, contamination, or failed insulation. Cleanup, sanitation, and new insulation in one project.
- Contaminated insulation removal and disposal
- Full attic sanitation and antimicrobial treatment
- HEPA vacuuming of all accessible surfaces
- New blown-in insulation to R-49 code
- Photo documentation of before and after
Green Attic LLC provides professional attic cleanup, sanitation, and insulation replacement for homes in King County and Snohomish County, WA. We remove contaminated insulation, HEPA vacuum all surfaces, apply antimicrobial treatments, and install new blown-in insulation to R-49 code. Most projects cost between $1,500 and $6,000 and take 1 to 3 days. Licensed (GREENAL785CS) and insured.
What We Walk Into
Most Attics Need More Than a Quick Fix
When we enter an attic for the first time, we usually find years of accumulated contamination. Rodent droppings, compressed insulation, moisture staining on sheathing, and debris that has been building up unnoticed. The problem is not just cosmetic. That contamination affects the air you breathe downstairs every day.
Our cleanup process starts with a thorough assessment of what is actually up there. We document everything with photos, identify the scope of contamination, and build a clear plan before any work begins.
What We Do
What Attic Cleanup Includes
Attic cleanup is not just about removing old insulation. It is a complete restoration of the space, from identifying contamination to installing new insulation and documenting every step. Here is what each phase covers.
Old, degraded insulation like this needs to be fully removed before cleanup can begin. Over time, contaminated or compressed insulation loses its R-value and becomes a source of airborne particles that enter your living space.
Our crew removes everything down to bare framing, sanitizes the space, and installs fresh insulation to current code. Here is what each phase of the process covers.
Contamination Assessment
- - Visual inspection of all accessible attic areas
- - Identification of rodent activity, mold, or moisture damage
- - Written scope of work based on actual findings
Insulation Removal
- - Commercial vacuum extraction of contaminated material
- - Proper bagging and disposal of all debris
- - Containment barriers to protect your living space
Sanitation & Treatment
- - Antimicrobial treatment of all accessible surfaces
- - HEPA vacuuming of fine particulate and residue
- - Deodorizing to eliminate lingering contamination odors
Ductwork Inspection
- - Check for rodent damage to HVAC ducts
- - Identify disconnected or crushed duct runs
- - Report findings for repair or replacement
New Insulation
- - Blown-in fiberglass or cellulose to R-49 code
- - Even coverage across the entire attic floor
- - Proper baffles to maintain soffit ventilation
Documentation & Reporting
- - Before and after photos of every phase
- - Written summary of work completed
- - Records useful for insurance claims or home sales
How It Works
Our Attic Cleanup Process
Every attic cleanup follows the same six-step process. We do not skip steps or cut corners because that is how problems come back. Here is what happens from start to finish.
Inspection & Assessment
We inspect your entire attic to identify contamination, insulation condition, moisture damage, and any rodent activity. You get photos and a written scope of what needs to happen.
Containment Setup
We set up containment barriers and negative air pressure to keep dust, debris, and contaminants from entering your living space during the removal process.
Insulation Removal
Contaminated insulation is removed using commercial-grade vacuum equipment. All material is bagged on-site and hauled away for proper disposal.
Sanitation & HEPA Cleaning
Every accessible surface receives antimicrobial treatment. We HEPA vacuum fine particulate, treat for odor, and ensure the space is ready for new insulation.
New Insulation Installation
We install new blown-in insulation to R-49, the current Washington state energy code. Ventilation baffles are placed at soffits to maintain proper airflow.
Final Walkthrough & Documentation
We walk you through the completed work, hand over before-and-after photos, and provide a written summary. Everything is documented for your records.
Pricing
Attic Cleanup Cost
Attic cleanup pricing depends on the size of your attic, the level of contamination, and what work is needed. Here is a realistic range for projects in King County and Snohomish County.
Typical Project Range
$1,500 - $6,000
Based on attic size, contamination level, and scope of work
What Drives Cost Up
- - Larger attic square footage (more material to remove and replace)
- - Heavy contamination requiring extended sanitation
- - Difficult access points or low-clearance attic spaces
- - Additional repairs such as damaged ductwork or vapor barriers
What Keeps Cost Down
- - Standard attic size (800 to 1,200 sq ft) with good access
- - Light contamination limited to one area of the attic
- - No structural repairs or ductwork replacement needed
- - Combining cleanup with rodent proofing in one project
Why It Matters
Why Attic Cleanup Matters
A contaminated attic is not just an out-of-sight problem. It directly affects the air you breathe, the energy your home uses, and the long-term condition of your roof structure. Here is what is at stake when attic contamination goes unaddressed.
Indoor Air Quality
Your attic is not sealed off from your living space. Air moves through gaps around light fixtures, ductwork penetrations, and the attic hatch. When insulation is contaminated with rodent waste or mold, those particles travel into the rooms below. People with asthma, allergies, or respiratory sensitivities feel the effects first, but poor attic air quality affects everyone in the home over time.
Energy Efficiency
Contaminated, compressed, or displaced insulation does not insulate. Rodents tunnel through it, moisture flattens it, and age degrades its R-value. If your attic insulation is not performing, your heating system works harder, your energy bills climb, and your home stays uncomfortable. Replacing old insulation with new blown-in material to R-49 restores your attic to current code and reduces energy waste.
Structural Protection
Moisture from contamination or poor ventilation promotes mold growth on roof sheathing and framing. Left unchecked, this leads to wood rot and structural damage that costs far more to repair than cleanup. Rodents also chew through electrical wiring, which creates a genuine fire hazard. Professional cleanup addresses these risks before they escalate.
If mold is already present, our mold remediation service handles testing and removal with independent third-party verification.
When to Act
Common Reasons for Attic Cleanup
Homeowners call us for attic cleanup for different reasons, but the underlying issue is usually the same: something is wrong up there, and it needs to be dealt with before it gets worse. Here are the most common situations we see.
Rodent Infestation
Droppings, urine, nesting material, and chewed insulation left behind after rats or mice have been in the attic. Cleanup should follow rodent proofing to prevent re-entry.
Home Inspection Findings
Buying or selling a home and the inspector flagged attic issues. Common findings include below-code insulation, signs of rodent activity, and moisture staining on sheathing.
Mold Discovery
Mold on roof sheathing, joists, or insulation caused by poor ventilation or roof leaks. Our mold remediation team handles testing and removal.
Old, Degraded Insulation
Insulation that has settled, compressed, or deteriorated over decades. Homes built before 2000 often have insulation well below the current R-49 code. Replacing it improves comfort and lowers energy costs.
Renovation Prep
Getting the attic cleaned and re-insulated before a remodel, addition, or conversion. Starting with a clean, properly insulated attic makes the rest of the project go smoother.
Fire or Water Damage
Attic damage from a roof leak, burst pipe, or fire. Damaged insulation needs to be removed and replaced, and the space needs to be sanitized before new material goes in.
Not sure which situation applies to you? Schedule a free assessment and we will inspect the attic and give you a clear answer. If your attic just needs an insulation upgrade without cleanup, we handle that too.
Our Work
Attic Cleanup Results
Every attic cleanup project is photographed from start to finish. Here is a look at what completed cleanup work looks like.
Where We Work
Attic Cleanup Service Areas
Green Attic provides attic cleanup, sanitation, and insulation replacement throughout King County and Snohomish County. We operate from two offices so we can serve homeowners across the region without long travel delays.
South Snohomish County
Not sure if we cover your area? Request a free estimate and we will let you know. If you are in King County or Snohomish County, there is a good chance we are already working nearby.
Common Questions
Attic Cleanup FAQ
Straight answers to the questions homeowners ask most about attic cleanup, pricing, and what to expect.
How much does attic cleanup cost?
Most attic cleanup projects in King County and Snohomish County fall between $1,500 and $6,000. The final price depends on your attic size, the severity of contamination, whether insulation replacement is included, and the accessibility of the space. We provide a written estimate with line items before any work begins.
How long does a full attic cleanup take?
A typical attic cleanup takes one to two days. If the project includes full insulation removal, sanitation, and new blown-in insulation to R-49, it may take two to three days. We give you a timeline during the estimate so you can plan accordingly.
Do I need attic cleanup after a rodent infestation?
Yes, in most cases. Rodent droppings, urine, and nesting material contaminate insulation and release particles into your indoor air. Simply trapping or excluding the rodents does not remove the contamination they left behind. Professional cleanup is the only way to fully address it.
Will you replace the insulation after removing the old material?
Yes. After removing contaminated or damaged insulation and sanitizing the attic, we install new blown-in insulation to the current Washington state code of R-49. You get cleanup and insulation in one project with one crew.
Is contaminated attic insulation a health risk?
It can be. Rodent droppings and urine break down over time and release airborne particles that enter your living space through gaps in the ceiling. Mold growth in attics compounds the problem. People with asthma, allergies, or respiratory conditions are especially vulnerable. Removing contaminated insulation and sanitizing the space eliminates the source.
Do you seal rodent entry points before cleaning up the attic?
We strongly recommend it, and we coordinate with our rodent proofing team to make sure entry points are sealed before cleanup begins. There is no point paying for attic cleanup if rodents can get back in a week later. If exclusion work has not been done yet, we can handle both as part of the same project.
What does attic sanitation include?
Our sanitation process includes antimicrobial treatment of all accessible surfaces, HEPA vacuuming of fine particulate and residue, and deodorizing to eliminate lingering smells. This kills bacteria and neutralizes contaminants left behind after insulation removal.
Can I clean my attic myself instead of hiring a professional?
We do not recommend it for contaminated attics. Disturbing rodent droppings without proper containment and respiratory protection can spread harmful particles throughout your home. Professional cleanup uses HEPA filtration, negative air pressure, and containment barriers to keep your living space safe during the process.
Does homeowner insurance cover attic cleanup?
It depends on your policy and the cause of the contamination. Some policies cover damage from sudden events but not ongoing maintenance issues like rodent infestations. We recommend calling your insurance company before scheduling work. We provide detailed documentation and photos that can support a claim if your policy applies.
What if you find mold during the attic cleanup?
If we discover mold during the cleanup process, we will document it and discuss your options. We offer full mold remediation services and can handle it as part of the same project. For significant mold growth, we recommend independent third-party testing before and after remediation.
How do I know if my attic needs cleanup?
Common signs include visible rodent droppings or nesting material, musty odors in your upper floors, discolored or compressed insulation, a home inspector flagging attic issues, or allergy symptoms that worsen indoors. If you are not sure, schedule a free assessment and we will inspect the attic and tell you what we find.
Do you provide before and after photos?
Yes. We photograph every phase of the project, from the initial conditions through removal, sanitation, and new insulation installation. You receive a complete photo record showing exactly what we found and what we did about it.
Ready to get your attic cleaned up?
We inspect the attic, explain what we find, and give you a clear price before any work starts. No pressure, no hidden fees. Schedule your free assessment today.
(800) 931-1938No obligation, no pressure
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Licensed and insured
WA License #GREENAL785CS
4.9 stars from 102 reviews
Real homeowners across King and Snohomish County