Bat guano is treated similarly to asbestos and mould — it is a real health risk that requires professional remediation, not a household vacuum. Our specialists work in full PPE under negative-pressure HEPA containment to safely remove contaminated insulation, treat affected surfaces with biological cleaning agents, and replace insulation to restore your attic to a safe and code-compliant state. This service is often performed alongside or after bat exclusion work.
Why guano matters
Bat droppings are not just unpleasant — they're a real health and structural concern, and the longer they're left in place, the more expensive remediation becomes. The main risks:
- Histoplasmosis. Dried bat guano releases Histoplasma capsulatum spores into the air when disturbed. Inhaling them can cause histoplasmosis, a serious respiratory infection. This is the single biggest reason cleanup needs to be done by trained specialists.
- Strong ammonia odors. Bat urine and droppings produce ammonia that permeates insulation and drywall. The smell can saturate a home and is very difficult to remove without removing the contaminated materials entirely.
- Insect and parasite attractants. Bat bugs and mites live in or near guano deposits and can spread to the rest of the home.
- Damage to insulation. Guano-saturated insulation loses most of its R-value. You'll see it in your utility bills before you smell it.
- Wood rot from urine. Over time, bat urine soaks into wood framing and causes rot — particularly serious in older homes with exposed attic framing.
When cleanup is required
Three situations make cleanup non-optional:
- Selling the home. Ontario sellers must disclose known wildlife infestations and prior remediation. A clean attic is part of "remediation done." Real estate transactions routinely turn on this.
- Insulation R-value compromise. If your heating bills have been creeping up, guano-soaked insulation is a likely cause. Replacement pays for itself in energy savings within a few years.
- Visible or smelly contamination. If you can see guano accumulation or smell ammonia in the home, the time to clean is now — not next year.
Our process
- Sealed-off attic with negative-pressure HEPA setup. Before any guano is touched, we set up containment so spores cannot circulate to the rest of the home.
- Full PPE. Tyvek coveralls, P100 respirators, sealed boots, and disposable gloves. This is not a job for a household dust mask.
- Removal of all contaminated insulation. By hand and with HEPA-filtered vacuums. Standard household vacuums spread the spores rather than capturing them — we never use them.
- Surface treatment with biological cleaning agents. Enzymatic, non-toxic to humans and pets. Treats remaining contamination on framing, decking, and drywall.
- Insulation replacement. You choose the type — blown cellulose, fiberglass batts, or spray foam. We recommend cellulose for the cost-to-performance balance in most homes, but the choice is yours.
- Final HEPA sweep and air-quality verification. Before we leave, the attic is verified clean and the negative-pressure setup is removed.
What's included
- Containment setup (sealed-off attic, negative-pressure HEPA)
- Full PPE for our crew
- Removal of all contaminated insulation and droppings
- Surface treatment with enzymatic cleaning agents
- Insulation replacement to current R-value standard
- Final HEPA sweep and verification
Not included (separate services):
- Bat exclusion or bat proofing — separate but often combined with cleanup. See our bat exclusion service.
- Drywall replacement if urine has soaked through ceilings — referred to a trusted contractor.
Why DIY isn't safe
We get asked this often, so we'll be direct: bat guano is treated similarly to asbestos and mould remediation. Sweeping or vacuuming with a regular vacuum aerosolizes the spores — that's exactly how histoplasmosis cases typically happen. Even with a household dust mask, normal vacuums don't filter to HEPA spec, so the spores pass through the filter and get blown around the home.
The right approach requires negative-pressure containment, P100 respirators, full PPE, and HEPA-filtered vacuums. None of that is realistic for a homeowner to set up for a one-time job. Hire a specialist — we're hardly the only option, but please pick one.
Pricing
Every home is different. Cleanup pricing depends more on contamination severity than on attic size — a heavily contaminated 600-square-foot attic can cost more than a lightly contaminated 1,500-square-foot one. Get a free, no-obligation quote after a brief inspection.
Frequently asked
What does the lifetime warranty actually cover?
If a bat re-enters through any point we sealed, we come back and do all the work necessary — at no extra cost. Forever. Coverage applies to every entry point our team sealed during the original exclusion. The warranty is transferable to new owners if you sell the home, with no expiration date. What it does not cover: entry points we did not seal (a new gap that opened after our work), points created by storm damage or third-party renovation, or substantial renovation that compromises the original sealing work. Full terms in /terms.
How much does bat removal cost?
Honest answer: it varies. Costs depend on home size, the number of entry points, how long the colony has been active, and whether attic cleanup and decontamination are needed. We do not publish a fixed range because every home truly is different — a small home with four entry points is a very different job from a similar home with fourteen, and a five-year-old infestation that has soaked the insulation is a different job from one caught in the first season. Every home is different. Get a free, no-obligation quote after a brief inspection. Most exclusions in our Grey Bruce Simcoe service area fall in a typical range, which we will share during the on-site inspection once we have actually seen what the job involves.
Are quotes really free?
Yes. On-site inspection, written quote, no commitment to proceed and no pressure tactics. We do this because every home is different and quoting accurately requires actually seeing the home — the roofline, the soffits, the attic if accessible, and the actual entry points. Inspections take 30 to 60 minutes depending on home size. You get the quote in writing and can take all the time you need to decide. There is no obligation to book the work after the inspection, and no fee if you decide not to proceed.
Is bat removal covered by home insurance?
Sometimes. Coverage varies by policy, by carrier, and by whether the bats caused damage that triggers wildlife-damage or vermin-damage coverage. Some policies cover the cleanup and repair side but not the exclusion itself. Others cover both. Many cover neither. It is worth a call to your insurer to ask specifically about wildlife or infestation coverage on your policy. We can provide written documentation of the work performed — including photos of entry points, materials used, and cleanup scope — for an insurance claim if needed.
How fast can you come?
Inspection within three to five business days is the norm. Same-week service across Grey Bruce Simcoe is what most homeowners get. Emergencies — a bat flying around a bedroom at midnight, an immediate health concern, a confirmed bite or skin contact — get same-day response when possible. We do not run an after-hours emergency line, but the contact form is monitored and our team responds first thing in the morning. For non-urgent inspections during peak season (late spring and summer), book early — the calendar fills up.