How to Get Rid of Springtails in Your Crawl Space
⚠️ PPE Reminder: Suit up before treating — gloves, glasses, mask, long sleeves, dedicated shoes. See the full PPE guidelines at the start of Section 3.
The crawl space is Ground Zero — and most people ignore it
If your home has a crawl space, there’s a good chance it’s playing a significant role in your springtail problem — and an even better chance you haven’t fully dealt with it yet. I know, because I was in exactly that position. The crawl space was one of the last things I tackled, and I wish more than anything I had started there.
A crawl space is, by its nature, everything springtails love: dark, often damp, full of organic material, and connected directly to the interior of your home through gaps, vents, and the structure of the floor above. Left unaddressed, it’s not just a breeding ground — it’s a direct highway into your living space.
What we did
Sealing the sill plate — DIY
The sill plate is the wooden beam that sits on top of your foundation wall, and the gap between it and the framing above is a common entry point for springtails migrating up from the crawl space into the house. We used SIGA Wigluv adhesive tape to seal this gap all the way around the crawl space. It’s a high-quality, durable tape designed for exactly this kind of building envelope sealing — and the application is genuinely straightforward. Clean and prep the surface, apply the tape, press firmly. That’s it.
Spray foam on the rim joists — professional
The rim joists — the framing members that run along the top of your foundation walls — are another significant entry point, especially if there are pipes running outside the home that aren’t properly sealed. We had a professional apply spray foam insulation to our rim joists, which sealed the gaps and created a proper barrier. This included repairing and sealing a few small holes where pipes entered the house.
This cost us $3,000. That’s not a small number, but it was more economical than a full crawl space encapsulation. Our crawl space was otherwise in good shape and didn’t require the massive investment of encapsulation. We thought about tackling this as a DIY project, but the volume of spray foam and sealant required meant leaving the work to professionals. Whether it’s worth it depends on the severity of your problem and the condition of your crawl space — but if you’re dealing with a serious infestation and have an unaddressed crawl space, it’s worth getting a couple professional opinions.
Moisture control in the crawl space
Beyond sealing entry points, controlling humidity in the crawl space is critical. We use a large dehumidifier running spring through fall — the months when humidity is highest and springtail activity peaks. A properly sized dehumidifier can make a meaningful dent in the conditions that attract springtails in the first place.
For targeted supplementary humidity control in specific rooms, we also use the Dravonic 30-pint dehumidifier — a compact unit that’s easy to position where you need it without committing to a full-size unit in every space.
A dehumidifier alone won’t solve the problem. We tried dotting smaller units around the house thinking more would be better, and found there’s a point of diminishing return. The crawl space unit is the one that matters most — that’s where the moisture problem is concentrated.
The flea trap lights — a game changer
This one surprised us. We placed domed flea trap lights with sticky pads in each corner of the crawl space, and they have become one of our most effective tools down there. The warm light draws springtails in, they land on the sticky pad, and that’s the end of them — before they can reproduce or migrate upward.
We keep them running year-round. They serve double duty: population control and monitoring. If the pads are filling up, we know conditions in the crawl space need attention. If they’re relatively clean, we know things are under control. Simple, passive, chemical-free, and genuinely effective.
Do it sooner than I did
If there’s one piece of advice I’d give my earlier self, it’s this: don’t leave the crawl space for later. It feels like the most daunting part of the problem — dark, unpleasant, potentially expensive — and it’s easy to keep putting it off while you focus on treatments you can see and do yourself. Start there. Or at least start there at the same time as everything else. You’ll thank yourself later.