Two Rivers (Change Location)


case studies in St. Louis, MO

Case Studies

Full basement demo for Mold Removal and Water Damage

Location: St. Louis, MO 63115

Problem: This is a mold remediation / water damage mitigation job.  We were called in to demo out an entire detached basement.  The basement had been left vacant for some time while a foundation and air conditioning unit leak slowly soaked and rotted the wooden sub-floor from underneath.  This caused the basement to have constant humidity and moisture that allowed mold to grow.

Solution: Containment was set up at the top of the basement stairs and an air scrubber was placed in the basement while work was in progress.  We removed all affected substrates.  Working from top to bottom, we started by removing the ceiling tiles.  Then we removed the drywall and paneling, also taking out the studs taking the walls back to the original concrete.  We then disassembled a built in bar and removed a refridgerator, sink and other appliances.  After all debris had been removed from the area we started on the sub-floor.  Took out carpet, lenolium and then 2 layers of a plywood acting as a sub-floor. 

Once down to original concrete walls and floor, we set up drying equipment to dry out the space (filled large trash can from all the moisture that was in the basement).  Once dry we could then treat the ceiling joists, walls and floor with antimicrobial to kill any remaining mold that may have been spread around during the demo process.  The space was now dry, mold free basement for the homeowner to use/rebuild. 

water damage in basement in St. Louis  mold growth in the basement

water damage removal   water damage flooding

water damage causing black mold   water damage and mold removal after shot

Mold removal from basement /partial demo

Location: St. Charles, MO 63303 

Problem: Owners of a new home were moving in and in the finished basement noticed some staining on the drywall from an old water event.  After further investigation of removing a couple baseboards, mold was found on drywall and baseboards. Mold removal had to be performed. 

Solution: We first set up an air scrubber and containment at the top of the basement stairs to prevent the spreading of mold to the rest of the house.  

We then removed all of the baseboards to expose the areas of concentrated mold so we could begin investigatory demolition (removing drywall) in those areas.  In this process, since we dont know the cause of the mold, we start by removing a small section of drywall to see if the mold is just surface mold or if there is mold present on the back side of the drywall as well.  We then continue until taking out sections of drywall until no more mold is present. 

In this case, we discovered that one layer of drywall was placed directly over an older layer of textured drywall, creating space for moisture to get caught and mold to grow.  We then decided that to be sure to remove all of the mold, we would have to do a 4' flood cut thoughout the entire basement.  Removing both layers of drywall and any insulation and carpet.

Once the affected substrates were removed, we then hepa vaccummed, treated and wiped the wall studs, concrete walls, remaining upper drywall walls and floors with antimicrobial. 

We then performed a duct cleaning to make sure no mold remained in the air system. 

black mold forming from water damage   mold growth caused by moisture

basement mold removal   dry wall chipping from water damage on the floor

basement water damage mitigation demo  black mold removal

Water damage / flooded basement with standing water 

Location: St. Louis, MO 63115

Problem: A heavy rain left 6+ inches of standing water in a basement due to floor drains being clogged. Water damage removal had to be performed. 

Solution: First, we had the drains unclogged to drain as much of the water as possible. Typically we would then remove all contents and then clean save-able items and discarding destroyed items. The owner opted to deal with the belongings themselves and just wanted us to get the basement dry. Next we pushed the remaining water to the drains with brooms and squeegees.   After all the standing water had been removed we then set up fans and a dehumidifier, checking daily for the next couple days to ensure all the relating moisture and humidity was taken care of.

water damage flood 

water damage causing mold after a severe flooding

Air Duct Cleaning in Union, MO

Location: Union, Missouri 63084

Problem: The customer had a mold problem and wanted to make sure the duct system was clean and mold free. The system had not been cleaned for a along time. Air duct cleaning was scheduled and mold removal was performed. 

Solution: We decided to do a duct cleaning to ensure the customers mold problem was completely taken care of. 

For duct cleaning we first hook up our machine which is a big vacume that pulls all air and debris towards it. First on the return side and then the supply side, somewhere on the main trunk line.   We then take compressed air, rods and brushes and clean each return and supply boot and line to the main trunk line. After cleaning each branch line we then clean the main trunk line back to where our machine is hook up. This ensures all dust and debris is collected by our machine. After cleaning each line, we then treat each line with an antimicrobial. Each vent cover or grill is hepa vaced and/or wiped to ensure cleanliness. 

Once satisfied with the main lines, we the  treat the main lines with antimicrobial. After the cleaning is complete, we button the system back up. Patching any holes  we created for access per NADCA specifications. We then ensure our work area is left clean and Vac/sweep any debris we may have tracked around while preforming the cleaning.

mold in the air ducts   mold removal and air duct cleaning   while air duct cleaning we found mold in the vents   

air duct cleaning removed black mold that was circulating through the air flow  clean air duct handler