Mold Mitigation

Location: Bothell, WA 98012

Problem: Home owners are selling their home and during the inspection for the buyer, mold was found on the sheathing in the attic. The mold was caused by a ceiling fan exhaust that had fallen from the vent.

Solution: We re-installed the exhaust ducting, hepa-vacuumed, sprayed an anti-microbial, wiped or scrubbed with a wire brush, treated with a Fiberlock areas where the heavy staining was still visible.

attic mold found during mold inspection


Location: Shoreline, WA 98133

Problem: A mold test was preformed by an outside testing firm in which determined a higher level of mold than normal. During my inspection there was not visible mold except on the vinyl window tracks. Moisture testing and a thermal camera was used to locate the possibility of moisture but none was found.

Solution: We cleaned and treated every surface in the unit from top to bottom, set air scrubbers and fogged.

moldy window sills


Location: Sammamish, WA 98074

Problem: Mold growth on garage door and mold in the master bedroom shower.

Solution: The garage was cleaned and treated. The shower was scrubbed and treated, containment area was set along with a dehumidifier. Once the shower was dry, we resealed the tile grout.

mold in master shower mold found on ceiling in garage.


Location: Edmonds, WA 98026

Problem: Homeowner had a pipe from above leaking into the office below. Leak had not been fixed so the leak was still active. Due to the year of the house I took an asbestos sample.

Solution: Asbestos results were positive for asbestos so we arranged an abatement company to come remove the asbestos so the plumber could fix the leaking pipe. After they finished their work we did our mold mitigation and dried out the structure. We had to have equipment onsite for 7 days with daily monitors.


Location: Bellevue, WA

Problem: The school had various areas throughout several buildings where the roof had leaked. Water staining and some mold was visible on ceiling. An estimate was done as to what we thought the damage was, but left the estimate very open ended in case the affected areas where found to be much larger than first attended.

Solution: Due to the age of the building, a full service asbestos test was done. Some of the areas tested came back positive for asbestos and an abatement company was called in to demo those specific areas. We set containment and air scrubbers. We removed the ceiling tiles and sheetrock from the ceilings. Once we started opening the drywall we found the damage was much more then initially thought. We then had to expand our containment to allow for the additional demo. We ended up removed the ceiling in 12 different areas.

Water stained ceiling tiles Mold found under sound proofing tiles containment area for proper mold removal


Location: Issaquah, WA

Problem: An outside drain became clogged during times of heavy rain fall which flooded the lower level of the townhouse twice. Homeowner removed their own carpet and pad and some of the baseboards and set portable heaters in the affected area. He called us once he noticed the mold growth.

Solution: Our techs set containment, set an air scrubber and started demo. They removed the remaining baseboards and door trim, interior door slabs and removed a 2 foot flood cut around the perimeter of the room where moisture and or mold had been detected. On the exterior wall there was double layers of sheetrock and on the common walls with the neighboring townhouses there was plywood shear walls that we treated and dried. After all the demo and mold mitigation was completed we set equipment and monitored for 3 days.

Drying out water damaged drywall Removal of water damaged drywall, carpet and baseboards


Location: Mercer Island, WA

Problem: Homeowner discovered mold growth on the drywall, baseboards, and carpet in the area that backs the tile shower in the master bathroom. Homeowner did try to clean the area themselves but was unable to remove the discoloration and bleached the carpet.

Solution: We set containment and floor protection. Set an air scrubber and began removing affected material. We removed the baseboards, lifted the carpet to remove the pad, and removed a 2 foot flood cut and then found plywood behind the sheetrock. our then had to cut out the plywood sheathing to expose the wall cavity for mold mitigation. Finally we set drying equipment, checked in daily for monitoring and removed all equipment in 3 days.

Mold growth on baseboards in master bedroom


Location: Kirkland, WA 98034

Problem: Water leak from the plumbing on the second floor had leaked down into the bathroom. The leak had gone unnoticed until some mold started to peak through the sheet-rock.

Solution: Our techs set up containment, floor protection on floor coverings where we may walk through. Set an air scrubber and started to remove the affected ceiling and walls. We treated the mold in the wall and ceiling cavities. We also set equipment to dry the structure. By opening the wall behind the tile tub surround we able to save the tile.

Plumbing leak on second floor caused mold growth


Location: Bellevue, WA 98007

Problem: This particular case the homeowner has a child with a heart condition so she was very concerned with product, containment, and contamination. The ceiling fans from both bathrooms were venting directly into the attic space. On both vents the ducts were made from a very old vinyl which had ripped and deteriorated over time. One vent was had the proper roof vent to vent out of the other vent was duct tapes up toward the ridge vent. Mold growth was present throughout the attic sheathing and some framing and finally the attic was under insulated.

Solution: We set containment to cover the floors, the closet, and any area that we may travel. We removed all the insulation and treated the attic with all organic chemicals . We then took down the old duct work and installed new ducting with a 4 inch tee so we could vent both fans correctly from a roof vent.

Bathroom exhaust fan vented directly into attic Mold contaminated attic insulation Mold found in attic roof


Location: Maple Valley, WA 98038

Problem: The structure was a 2500 sf indoor pool house with 24 foot ceilings, bathroom, pump room and 2 furnace rooms located on each end of the building. Each one of the furnaces was equipped with a dehumidifier function. Unfortunately one of the systems burned out and the other systems was not strong enough to dehumidify the entire structure.

Mold growth was present on the sheet rock, tile wainscoting, built-in speakers, projection screen, furniture, cabinets, insulated ducting and around the windows mushrooms had spouted through the corners. The pool itself measured 18 feet wide and 36 feet in length making it a challenge to reach the 24 foot peaked ceiling.

Solution: First plan of action was to cover all the flooring with ram board and used 6 mil plastic, 2 layers to cover the pool it's self. We built a deck over the pool using 4" x 8" x 24' beams and 80 sheets of 3/4 inch tongue and grove OSB. In order to get the 24 foot beams into the building our crew had to carry them down the far side of the main house through a trail in the back yard down through a sport court and through the center door of the pool house.

We built two different sets of scaffold one for the lower part of the ceiling measuring at 12 feet tall and the rest of the ceiling measured anywhere from 12 feet to 24 feet.

Our techs removed over 9,000 sf of drywall and insulation bagged and trashed in an onsite dumpster. The whole structure was then vacuumed, scrubbed, treated and fogged.

Mold removal for indoor pool house


Customer: Laura Townsend, Real Estate Agent

Location: Duvall WA 98019

Problem: Laura, with whom AdvantaClean had worked before, called us on a Tuesday with a real challenge. She was the selling broker on a real estate deal set to close on Friday, and the buyers home inspector had just discovered mold in the attic, together with inadequate insulation. In addition, the inspector determined that insulation in the crawlspace had been damaged, and some of it needed to be replaced. Time was of the essence--all work had to be completed before the closing on Friday.

Solution: AdvantaClean sprang into action, going out that afternoon to inspect the home, and agreeing with the sellers on a plan of action. First, AdvantaClean vacuumed out the old insulation with our 19 hp insulation vacuum. Next, we treated the attic mold, making the attic sheathing look good as new. Finally, our technicians reinstalled new attic insulation, bringing the home up to current code. We then repaired and replaced, as needed, the insulation in the crawlspace.

This job was made extra challenging by the fact that the home had a fire sprinkler system located in the attic, requiring AdvantaClean technicians to exercise extreme care not to break any sprinkler pipes, which would have flooded the home. The work went without a hitch, and the closing went through as planned on Friday.

Check out the before and after pictures below:

After: Attic sheathing after treatment: perfect! Before: Attic mold infestation on sheathing


Customer: CDK Construction

Location: Issaquah, WA

Problem: During a multi-million dollar renovation of a large condominium complex, mold was discovered in 45 attics. AvantaClean was selected for the remediation by CDK Construction, a leading construction company in the Seattle area.Because of the difficulty of scheduling access to the attics from the individual condominium units, AdvantaClean technicians had to enter the attics through holes cut through the roof, four stories above the ground. This required them to wear cumbersome safety harnesses to protect from falls. In addition, since much of the work was performed during summer heat,our technicians had to work in attic temperatures in excess of 130 degrees, all while wearing waterproof full body protective suits, gloves,and respirators.

Solution: The mold remediation plan for the attics was developed by a Certified Industrial Hygienist.The plan required manual hand scrubbing of the mold, a highly labor-intensive process. AdvantaClean requested that it be permitted to use MMR, an extremely effective mold removal chemical that requires minimal scrubbing. After AdvantaClean demonstrated MMR to the CIH, the CIH changed the protocol to allow its use.The result was a far better result, performed in a much safer way, and at a lower cost. AvantaClean also developed a detailed heat safety work plan for its technicians, which allowed them to complete their work without any heat-related injuries in this extremely challenging environment.

We provide the residents of the Eastside, with the warm customer care of a local business and the skilled service of a national franchise. AdvantaClean has been improving its work continuously throughout its more than 20-year history.

Call us to set up a consultation (425) 357-7481!

The AdvantaClean Promise to You

  • Handshake Icon Always Exceed
  • Cogs Icon Demonstrate
    Technical Competence
  • 24/7 Icon 24/7 Emergency
  • Arrow Icon Always
  • Handyman Icon Serve
    with Professionalism
  • Sparkle Icon Make Your Home
    Safe, Clean & Healthy