Clear the way to the crawl space hatch before we come, so we can reach every corner under the floor.
A crawl space mold inspection in Falls Church happens under the floor, where we read the soil, the vapor barrier and the framing most owners rarely see.
In a house built before 1980, as 43.6 percent of Fairfax County's housing was (Census Bureau, 2020 to 2024), the crawl space may have had plumbers, electricians and HVAC installers working in it over the years, and any of those visits can leave the barrier torn or pushed aside.
This page sits under our mold inspection & testing service.
5.0/5 stars on Google. Every review here is quoted word for word from Google. Read them all on our reviews page.
“Pure maintenance is the best company I have worked with for mold remediation and testing. If you are looking for the most cost effective and safest way to eliminate a mold issue their dry fog treatment takes care of the issue. I highly highly recommend them!”
“Bryce went out of his way accommodate me and reassure me about the concerns and process moving forward! And James was thorough, accommodating and a pleasure to work with. Highly recommend them both.”
“I had questions about mold removal after reviewing the home inspection report of our first new house. Rather than make the case for a what would be - I imagine - an expensive remediation, I got an honest answer that put my concerns to rest, and a DIY solution. If there ever is a need for mold removal professionals, I’ll know who to call first!”
“Bryce was prompt, polite, and very professional. I'm grateful that Angie's List sent me to Pure Maintenance.”
“Working with Pure Maintenance was a fantastic experience. Bryce was responsive when scheduling the appointment, and he was very informative when explaining the treatment plan and why it would be effective. The technician came at exactly the scheduled time, and the work was completed efficiently. We have already recommended them to our friends!”
“Such great work, an honest company and professional. High recommend their services.”
Tell us where the access is when you book: a hatch in a closet floor, a door in the foundation wall or a panel behind the stairs. Move stored boxes away from it, and if the outside door is behind shrubs, clear a path. Leave the crawl space itself as it is, so we see it the way it has been.
We look at the soil first: standing water, damp patches, and whether the vapor barrier covers all of it and is sealed at the walls.
A tide line on the block or a crust of silt on the soil shows where water has stood after heavy rain, even when the crawl space is dry on the day we visit.
We note where the barrier is torn, stops short of the walls or has untaped seams, so whoever repairs it knows where to look.
We take moisture readings in the wood and compare damp areas with dry ones:
We follow the supply and drain lines and any dryer vent that ends under the house instead of outdoors. Damp wood under a bathroom or the kitchen points to a pipe above it, while damp joists over a wet patch of soil point to the ground.
If you know where the dryer vent ends, tell us. Warm, wet air and lint from a dryer venting under the floor can feed growth on the joists around the outlet.
When the readings leave a question open, we take air samples in the crawl space, the living area and outdoors, plus tape samples from the framing. Counts higher below than upstairs, and higher upstairs than outdoors, suggest the crawl space is feeding the house.
Samples go to an accredited third-party lab with no affiliation to EnviroPure. Air and tape results usually come back in 2 to 3 business days.
The report gives the spore count per cubic meter and the genus of what was found, compared against outdoor and baseline samples. It is written in plain language with clear next steps, and it is yours to keep.
EnviroPure is a licensed provider of Pure Maintenance's patented VaPURE process.
The consultation and visual inspection are free, and when the inspection confirms visible mold, you get an estimate.
This page covers one part of the job. The mold inspection & testing page covers the rest.
A crawl space isn't sealed from the house. Air moves up through gaps around pipes, wires and ducts, so a smell upstairs can start below.
A sealed crawl space can still take on water from a plumbing leak or a torn liner, so a smell or a stain is reason enough. Readings show whether it is staying dry.
We note how deep it is and where it stands, and read whatever framing we can reach. Samples are more useful once the water has gone.
As far as the clearance allows. The far corners and the sill plates along the back walls can't be judged from the hatch, so we crawl to them, and we tell you about any section too tight to reach.
Call or book online and we'll set up the first conversation.
We cover Northern Virginia and Montgomery County, MD: McLean, Fairfax, Tysons and Vienna in Fairfax County, Alexandria, and Potomac, Chevy Chase and Bethesda on the Maryland side. In Arlington, we offer mold testing and inspection. Ask us about your street.
Falls Church · McLean · Vienna · Tysons · Great Falls · Oakton · Annandale · Springfield · Fairfax
Alexandria · Old Town Alexandria · Kingstowne · Arlington · Crystal City · Ballston
Bethesda · Potomac · Chevy Chase