“Terry and his team were wonderful to work with. They were quick to schedule, answered all my questions, and were very responsive. I would definitely recommend this company!”
Serving Spokane · the Inland Northwest
Mold Prevention in Spokane, WA
A season-by-season plan for keeping a Spokane house dry, and what the protectant stage of VaPURE does after a treatment. Mold needs water; take the water away and it has nowhere to start.
Whole-Home Treatment
EPA Safer Chemical Ingredients List
A Lab Report You Keep
Workmanship guaranteed
On every My Pure Environment treatment
What keeps mold from coming back in a Spokane house? Mold prevention in Spokane, WA is mostly a moisture job, and the moisture arrives on a schedule: rain and snow from November, ice dams and sweating windows through the deep winter, seepage when the snow goes in March, and shut windows through smoke season. This page walks the year in order, then explains what the antimicrobial protectant stage of the VaPURE process does after a treatment.
No treatment stops mold for good, ours included. Mold needs water, and a Spokane year supplies it for months at a stretch. So the order matters: fix where the water comes from, treat the mold that is there, and let the protectant help the surfaces resist regrowth while the house dries out. Skip the first step and the other two only buy time.
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“Kaleb and his crew were incredible to work with. They provided all of the information on the front end to help make this a wonderful experience. If you're fighting the uphill battle against mold, I strongly recommend getting My Pure Environment involved. Thank you guys again for take such great care of us.”
“Terry was on time and was very professional. His down to earth personality, and his knowledge of the products was very beneficial.”
Clear the gutters in October
Spokane turns damp in October, and December is the wettest month of the year in the long-run climate records, with rain or snow on about fifteen of its days. Water a gutter should carry away instead runs down the siding, pools against the foundation and finds the basement wall. October is the month for the ladder: clear the leaves, make sure the downspouts run several feet from the house, and check that the soil slopes away from the foundation.
While you are outside, check where the bathroom and dryer vents come out. A fan that dumps into the attic instead of outdoors runs all winter, and we see the result on the underside of the roof deck the following spring. Inside, put a fresh filter in the furnace before it starts its six-month shift.
Watch the windows through the deep winter
January is Spokane's most humid month, and it lands while every window in the house is shut and the furnace is running. Warm damp air meets cold glass and shows up as condensation on the coldest mornings, then as dark spots on the sill and the drywall below. Treat sweating windows as a gauge. Run the bathroom fan for twenty minutes after every shower and the kitchen hood whenever you cook, and if the glass still sweats, put a dehumidifier in the worst room. The Spokane Regional Health District sets a ceiling for indoor humidity on its mold page, and a hygrometer from any hardware store tells you whether you are under it.
The other winter water comes from the roof. Heat leaking into the attic melts the underside of the snow, the meltwater runs to the cold eaves and refreezes, and the ice dam that builds there pushes water back up under the shingles. Spokane roofers treat it as a routine winter call. From inside, the signs are icicles along one stretch of eave, a stain on a top-floor ceiling, or damp insulation when you lift the attic hatch. More attic insulation and a clear air path from soffits to ridge fix most of it.
Test the sump pump before the melt
Spokane's snowpack usually starts going in late February or March, often when a Chinook wind arrives, and it goes fast. The local advice every year is the same: test the sump pump in February and clear the storm drain at the curb before the first warm storm, because rapid runoff into a yard with poor drainage ends up in the basement. Walk the basement after the first warm week. Look for a tide line on the concrete, white mineral crust at the base of the wall, and carpet that feels cool underfoot. A basement that takes on water every March has a drainage problem, and a dehumidifier will not fix it.
Dry the house out in summer, smoke or not
July and August are the dry months and the best window for drying out a crawl space or airing a basement before fall. The catch is smoke. By Spokane Clean Air's count, smoke pushed the region into unhealthy air about six days each summer between 2020 and 2025. The advice on those days is to shut the windows, set the HVAC to recirculate and run a MERV-13 or better filter. Right for the smoke, but it also turns the house back into a closed box in the one season it was meant to breathe, so run the air conditioning or a dehumidifier on those days.
Second homes and seasonal places around Coeur d'Alene, Hayden Lake and Sandpoint that sit unused for stretches need the same attention with nobody there to give it. Away from the water, inland North Idaho towns can run ten to twenty degrees colder overnight in winter than the lakeshore, cold enough to freeze a line in an unheated house, and a small leak under a sink runs for a month before the next visit. Leave the heat on low, shut the water off at the main when you go, and ask whoever checks on the place to open the cabinet under every sink.
Let the protectant stage do its part
The VaPURE process has two stages. The first is a sterilant vapor that treats the mold present, on surfaces and in the air, reaching wall cavities, attic and crawl-space framing, HVAC ducting and porous materials as well as the room you can see it in. The second is an antimicrobial protectant, applied the same way, that stays on those surfaces after we leave and helps them resist regrowth through the next wet season.
It does not make a wet wall immune, so the moisture work above still matters. The house is vacant during treatment: people, pets and plants out, typically four to six hours, and back in the same evening. Before and after, air samples go to an independent accredited lab, so you have a written baseline for later.
Why My Pure Environment
What sets us apart.
Whole-Home Treatment
The vapor moves through wall cavities, attic and crawl-space framing, HVAC ducting, porous materials and the air itself, so the protectant lands where moisture problems start, well beyond the patch you could see.
EPA Safer Chemical Ingredients List
The active component of the sterilant is on the EPA's Safer Chemical Ingredients List, and it breaks down into acetic acid (white vinegar), oxygen and water shortly after treatment.
A Lab Report You Keep
An independent accredited lab tests air samples before and after every treatment, and the written report is yours. Buyers, landlords and insurers ask for it.
Frequently Asked
Have questions? Start here.
Have a question we haven't answered? Contact us, or call 866-940-1153.
It treats the mold that is there and leaves an antimicrobial protectant that helps surfaces resist regrowth. If the water comes back, mold can too, so we tell you what to fix as part of the job. Every treatment carries our workmanship guarantee, and you can ask about re-treatment options.
Low enough that the windows stop sweating on cold mornings. If they still sweat with the bathroom and kitchen fans running every time, a dehumidifier in that room is the next step.
For damp air, yes. For water coming through the wall in March, no. A dehumidifier dries the air after the water has arrived and does nothing about the downspout, the grade or the drain that let it in. Fix those first.
We would rather start with an inspection and lab testing. If the numbers come back normal we say so, and you have a baseline report for later. If they do not, a treatment with its protectant stage makes sense.
Leave the heat on low, shut the water off at the main, and have whoever checks on the place look under every sink. If it is musty when you open it up in spring, call us before you air it out and forget about it. A smell that repeats every year is a leak that repeats every year.
Schedule Your Free Consultation
Get ahead of next season's water.
Book a free consultation and we will walk the house with you, show you where the water gets in, and tell you plainly whether anything needs treating.
Head back to My Pure Environment in Spokane, WA or browse all our Spokane services.
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Where We Work
Serving Spokane & the Inland Northwest.
Based on Spokane's South Hill, we serve homes and businesses throughout the Inland Northwest, including Spokane Valley, Liberty Lake, Cheney, Mead and Deer Park, WA, plus Coeur d'Alene, Post Falls, Hayden and Sandpoint, ID. See our full service area list.