How to Remove Mold From a Basement in Evergreen, CO

Removing mold from a basement in Evergreen, CO means treating each surface by its material, because concrete, lumber, carpet and drywall do not behave alike once they have been damp for a while. Hard, non-porous surfaces can usually be cleaned. Soft, absorbent ones are the usual candidates for removal. Walk the basement with that sorting rule in mind before you buy anything.

The sorting rule behind every decision

Mold feeds on moisture and on organic material, so the more absorbent the surface, the deeper it can get. EPA homeowner guidance puts the homeowner-sized job at roughly 10 square feet of surface growth, and it says larger or hidden growth calls for a professional. Everything below assumes you are inside that limit or are planning how a crew would treat the same materials.

Keep one eye on the clock as well. The same guidance says wet materials should be dried within about 1 to 2 days, since that window is when growth is easiest to prevent. Work that happens weeks after a leak starts with a much harder sorting job.

Concrete and masonry walls and floors

Poured concrete, block and brick are the easiest basement materials to deal with. They are hard and mostly non-porous, though unsealed block and old mortar can hold moisture inside the pores. Surface growth on these is typically scrubbed with detergent and water, rinsed with a damp cloth and then dried completely.

EPA homeowner guidance on cleaning is cautious about bleach, and it should not be your default. Never combine bleach with ammonia or other cleaners, and keep the room ventilated. If a slab or wall stays damp after cleaning, the work is not finished: that points to a seep, a grading fault or condensation that still needs fixing.

Wood framing, joists and sill plates

Dimensional lumber is sturdier than it looks. Framing with surface growth is often cleaned by a crew with HEPA vacuuming and wiping, then dried until a moisture meter shows readings back in a normal range. Lumber that is soft, crumbly or visibly decayed is a structural question, and a professional should look at it before you load weight onto it.

Sill plates, where framing meets the foundation, deserve special attention because they sit against cold concrete and collect condensation. Joists near a leaking supply line are the other usual trouble spot. Probe with a screwdriver: wood that resists is one thing, and wood that gives way is another.

Carpet, pad and stored boxes

Carpet and pad that have been wet for more than a day or two with visible growth are normally discarded. The pad acts like a sponge, and cleaning the surface fibers does not reach what is underneath. Cut the carpet into strips, bag it, and carry it out without dragging it through clean rooms.

Cardboard boxes and paper goods are in the same category. Photographs and documents are sometimes worth saving, and a restoration company can advise on drying and freezing options, but a damp cardboard box of old clothes usually is not. Move anything you want to keep to a dry room and sort it there.

Insulation and drywall

Fiberglass batts and foam board behind a damp wall are porous in practice, since they hold water and dirt in their fibers. Insulation with growth or sustained moisture is removed, and the same goes for drywall that has been wet long enough to show staining, swelling or fuzzy growth on either face. Cut the board out past the visible edge of damage, and check the cavity behind it with a moisture meter before closing anything up.

This is where the job crosses the line most often. A wall cavity opened by a homeowner without containment sends dust through the house, which is why crews seal off the work area, run negative air and filter it through HEPA air scrubbers. If your wall work looks like that, read about mold remediation before you pick up a utility knife.

Moisture source checklist

Go through these in order, and photograph anything you find before you change it.

Where the water comes from in the creek corridor

When the flood is bigger than the mold

If water came in from outside, whether from a creek, a storm drain or a sewer backup, the order of work changes. Extraction, drying and sanitation come first, and mold removal waits until the structure is dry. That job falls under flood damage restoration, and it is a different process from handling a single stained wall.

Crews also reach canyon-bottom homes near Idledale, where the highway along the creek is the only route in, and basements in Morrison, where Mount Vernon Creek joins Bear Creek. Ask about access when you call.

Frequently asked questions