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March 6 - Lynnwood, Washington
Mold Removal & Remediation

Removal and remediation of mold growing on the insulation in the crawlspace that's above the ceiling.

Mold Removal & Remediation near Lynnwood, Washington

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Services Offered: Environix Seattle      
Mold Removal & Remediation x      
Mold Testing x      
Mold Inspection x      
Lead Testing & Inspection x      
Asbestos Remediation x      
Asbestos Testing x      

Environix Seattle

12303 8th Ave. NE
Seattle, WA 98125

Environix Certified Provider

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Our principles have always remained the same:  Provide the absolute best consulting and remediation services for indoor environmental issues.  For information on our asbestos services, check out our new site. For other services visit our parent site at

Recent Mold Inspection & Remediation Clients Include:

  • US Coast Guard
  • UW Medicine
  • McChord Air Force Base
  • Port of Seattle
  • University of Puget Sound


3223 164TH ST SW

Example Report for Mold Removal in Lynnwood, WA

Date of Project: Jan 4th, 2012

Mold Growth:

  • Inspection of attic revealed moderate mold growth throughout areas of attic sheathing.  At this time, the mold growth has not lead to significant structural damage of the underlying materials. However, the mold growth may be a health concern and is an indication of a failure of the home to adequately exhaust damp air created by the occupants. 


  • At the time of inspection no increased moisture content was noted in the framing or sheathing, but the mold growth suggests that moisture content is likely increased at specific times of the year.


  • Obvious roof leaks were noted in the attic.  To prevent further damage, it is necessary to hire a professional roofing contractor to resolve the leaks immediately.  Environix can provide the names of reputable contractors at the customer’s request.


  • Visible mold growth was noted on the kraft-facing of the insulation throughout the inspected portions of the attic.
  • Insulation has been installed in direct contact with the roof sheathing, and has become the first condensing surface in the attic.


  • The attic is current not ventilated, and not appropriately established as a conditioned attic.


Remove contaminated insulation and treat mold growth.

  • Establish temporary containment in areas below drop ceiling tiles sufficient to remove all insulation.
  • Install HEPA scrubbers for negative pressurization in contained areas to limit dust generation, and filter mold spores during insulation removal.
  • Remove, bag, and dispose of all insulation.
  • HEPA vacuum all contained areas to remove dust and mold spores generated during removal.
  • Apply EPA-registered anti-microbial agents to all attic spaces and office spaces affected by insulation removal via ULV fogger.
  • Apply latex-based anti-microbial encapsulant to all mold stained areas of the roof sheathing and framing.
  • Allow HEPA scrubber to run for at least 48 hours to filter remaining air in affected office spaces.

Preventing re-growth:

Option 1 (convert to a proper unvented conditioned attic)-

  • Add no additional ventilation
  • Install 2-part poly-isocyanurate insulation to all roof sheathing and exterior gable walls common
  • Insulation must be of closed-cell variety
  • Insulation must be thick enough to achieve a perm rating of 1.0 or less (estimated to be 2” thick and have an R-value or R-14)

Option 2 (convert to a proper ventilated attic space):

  • Hire roofer to add appropriate ventilation to meet code requirements (Current code calls for 1sqft of ventilation for every 300 square feet of attic space, distributed evenly between the ridge and soffit area. ) likely to include: 
  • 50 square inch passive vents at the top of all sloped areas
  • Soffit vents in blocking at joist ends and exterior eaves, protected by cardboard baffles
  • Long site-built continuous vents above the flat portion of the roof.
  • Install R-30 fiberglass batt insulation above drop-ceiling in all areas.


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