| Factor | Heat treatment | Chemical treatment |
|---|---|---|
| Number of visits | 1 | 2–3 |
| Total duration | 6–8 hours, single day | 4–6 weeks (multiple visit cycle) |
| Kills eggs? | Yes — penetrating heat kills all life stages | No — most chemicals have limited ovicidal effect |
| Prep required | Moderate — remove plants, pets, heat-sensitive items | Extensive — launder everything, bag clothing, vacuum seams |
| Resident displacement | One day out of home | 4–6 hour exclusion per visit, 3 visits |
| Chemical exposure | None | Pyrethroid/neonicotinoid residue 4–6 weeks post-treatment |
| Strata-friendly? | Yes — no chemical drift to adjacent units | Possible concerns re: shared air handling |
| Re-treatment rate | Under 5% in our dataset | 10–15% when follow-up visits are missed |
| Cost range (per unit) | $1,200–$2,000 residential | $300–$500 per visit × 2–3 visits |
How heat treatment works
Specialized propane or electric heaters raise the entire treated space to 50–55°C and hold for 6–8 hours. Strategically placed fans ensure heat circulation into wall voids, inside mattress seams, and within furniture. Bed bugs and their eggs die at sustained temperatures above 47°C — a thermal death point well below any building material damage threshold. The single-visit completion is the operational difference: heat reaches eggs that pyrethroid sprays cannot penetrate, eliminating the reason chemical protocols require follow-up visits (eggs hatching post-treatment and restarting the infestation).
What happens to your belongings during heat treatment
Temperatures of 50–55°C are safe for most household contents. Items that require removal or staging: live plants (leaves scorch above 38°C), certain candles and wax items (will melt), vinyl records (can warp), musical instruments with glued joints, artwork with wax-based mediums, and consumer electronics with lithium batteries (manufacturer spec is typically 45°C; we stage these as a precaution rather than a certainty). Mattresses, clothing, linens, wood furniture, and the vast majority of common household items can stay in place. The technician will review a staging checklist with you on booking.
How chemical treatment works
Pyrethroid-based or neonicotinoid-based liquid insecticides are applied to harborage sites (mattress seams, headboard cracks, bed frame joints, baseboards), plus dust formulations in wall voids. The first application kills active adults and late-instar nymphs that are exposed. Eggs survive — most pyrethroids have minimal ovicidal effect. When eggs hatch (6–10 days post-application), newly emerged nymphs encounter residual chemical and are killed, but this requires another inspection to confirm. Most chemical protocols require 3 visits: initial application, 10–14 day follow-up, 30-day confirmation. Missing the follow-up is the most common cause of treatment failure.
Pyrethroid resistance in Metro Vancouver bed bug strains
BC bed bug populations show documented pyrethroid resistance in Vancouver and Burnaby strains, consistent with resistance patterns documented nationally and internationally. Resistance doesn't mean pyrethroids are useless — but it does mean monotherapy (one chemical class only) is less reliable than it was a decade ago. Responsible chemical protocols use rotated actives (pyrethroid + neonicotinoid, or inclusion of a chitin synthesis inhibitor) rather than a single-active-ingredient approach. If a chemical treatment has failed once, discuss active rotation with the applicator before the second attempt.
When chemical is the right choice
- Very large structures (commercial, institutional) where heat coverage across multiple floors is impractical with portable equipment.
- Properties with extensive heat-sensitive contents that cannot be practically staged — large art collections, museum-quality pieces.
- Cost-constrained situations where the upfront heat cost is prohibitive and the resident can commit to the 3-visit chemical cycle.
- Moderate infestations in single-family homes where pyrethroid resistance has not been previously documented.