Heat versus chemical - why two quotes differ by thousands

Yes - and this is one of the few home services where that is genuinely true nationwide. Applicator certification is required under federal pesticide law and administered by each state, usually through the agriculture department, though some states use a dedicated board or the health department. Exam fees, insurance and bond requirements differ substantially by state. This site links to each state's own licence lookup.

For most routine interior treatments the rule is set by the product label, which is federal law - commonly re-entry once treated surfaces are dry. The widely circulated 'twelve hour' figure comes from agricultural worker protection standards and does not apply to homes. Fumigation is different and does require vacating. Ask the technician what will be applied and what the label requires.

Product labels carry legally binding directions covering application, ventilation and re-entry, and a professional is required to follow them. Tell the company in advance about pregnancy, infants, pets, fish tanks or asthma, and ask which products will be used and for the labels. Where a lower-risk approach exists - baits and targeted application rather than broadcast spraying - it is reasonable to ask for it.

There are two types and the difference is enormous. A retreatment-only bond obliges the company to treat again if termites return but, in the words of state agriculture regulators, does not obligate it to repair, replace or correct any damage the termites caused. A retreatment-plus-damage bond additionally covers structural repairs up to a stated cap. Ask which one you are being offered, in writing.

Because they are quoting different products. Chemical treatment runs 200-400 dollars per room and usually needs two to three visits weeks apart; whole-room heat treatment runs 400-900 per room but is typically one session with equipment on site. Whole-job totals commonly land at 1,000-2,500, with severe cases higher.