Cluster flies, also called attic flies, are slow, sluggish flies that pile up in attics and on upper-floor windows in fall and early spring.
They breed outside as parasites of earthworms, so Burnaby homes next to lawns, parks and fields get them most. In fall they crawl into gaps in the siding and roof to overwinter, then wake up on warm days.
Pest Boss handles cluster fly control across Burnaby. We treat where they’re getting in and where they gather.
Give Pest Boss a call if you’re seeing any of these:
- Clusters of slow flies on sunny windows
- Dead flies piling up on sills and in the attic
- Flies showing up on warm winter days
Shiny green or blue flies instead? See our blow fly page.
What’s included in our cluster fly services
Cluster flies are best handled before they settle in for winter.
- Free estimate by phone. Answer a few quick questions and we’ll give you a price.
- Inspection. We find the gaps they’re using and where they’re gathering.
- Exterior treatment. We treat the siding, eaves and entry points in late summer and fall.
- Attic treatment. We treat the spaces where they overwinter.
- Sealing advice. We point out the gaps worth closing.
Our technicians are licensed through the BC Ministry of Environment and fully insured.
What Burnaby customers say about Pest Boss
Here’s what a few of our customers wrote on Google.
“Pest Boss consistently delivers reliable pest control solutions. Having utilized their services personally and referred friends, I can attest to their hardworking nature and their ability to efficiently get the job done.”
Phebe T., Google review, 5 stars
“tl;dr: Super responsive, quick to follow-up, very thorough invoice with notes, super knowledgeable and hard working tech. 10/10 would recommend Pest Boss!!”
??, Google review, 5 stars
“… Great for bed bugs, rats, ants, or anything else. Very fair pricing and very honest. Always shows up on time and goes out of the way to explain multiple treatment options. Does not try and drum up unnecessary work. Best in the Business! …”
Valet Holdings, Google review, 5 stars
What is the cost for cluster fly control in Burnaby?
The cost for cluster fly control in Burnaby depends on the size of your home and how many areas need treating.
Not sure what you’re dealing with? A pest inspection in Burnaby runs $178 to $395, and we’ll tell you exactly what’s going on and what it’ll take to fix it.
Call us for a free estimate by phone before any work starts.
Need help with cluster fly control in Burnaby?
After a few simple questions, free estimates can be given over the phone for cluster fly control in Burnaby and neighbouring communities. Call the Burnaby cluster fly experts now at 778-953-2677 or contact Pest Boss by email.


