How to Run a Perimeter Band Treatment on a Home

Why this matters

The exterior band is the part of a residential visit the customer watches from the window, and the part most likely to put product where it should not be: on the vegetable bed, down the driveway into the storm drain, across the dog's water bowl. It is also the part most often done as a fast lap with the wand, which leaves gaps behind the deck skirting and the AC pad, exactly where the ants and crickets come in. A band done properly is continuous, stays where the label says it goes, and is written down segment by segment. This card owns the sequence of the exterior lap; the visit it sits inside is covered in 'Quarterly Residential Pest Service'.

Before you leave the truck

Read the label for this product and this site, today. The band's width out from the foundation, its height up the wall, the dilution, the re-entry instruction and the weather limits all come from the label, not from habit or from the last product you carried. Where to look:

• Directions for Use, under the outdoor, perimeter or structural exterior heading: band dimensions, the sites the product is allowed on, and how often it may be reapplied.
• Environmental Hazards: the runoff and water language. Many current outdoor labels restrict applications to impervious surfaces such as driveways, sidewalks and patios to spot or crack-and-crevice treatment only, and forbid application to surfaces that drain to storm sewers.
• Precautionary Statements: the PPE the label requires of the applicator, which is a condition of use. If the label names gloves and long sleeves, applying without them is use inconsistent with the labeling.
• Weather: many labels prohibit application during rain or when rain is expected soon, or above a stated wind speed. Check the forecast against the label, not against a shop rule of thumb.

The mix itself (output, tank volume, how much concentrate goes in) is arithmetic another card owns. See related: Sprayer Output and Tank Mix Math Worked From the Label. The sprayer you carry should have been calibrated per 'Backpack and Power Sprayer Calibration' before it went on the truck.

What the band covers

The house is treated as a closed loop, and every point where the loop meets an opening gets its own attention. The diagram is a single-story slab ranch with brick veneer, the house in the worked example below.

 PLAN, 48 ft x 30 ft                     N
 +--------------- BACK 48 ft ---------------+
 | deck full length, 16 ft deep: band at    |
 | foundation under deck + skirting base    |
 W 30 ft                         E 30 ft    |
 | hose bib, dryer vent       veg bed 12 ft |
 |                            AC pad, line  |
 |                            set entry     |
 +-[front door]--[window]-[garage dr 16 ft]-+
                 FRONT 48 ft

 SECTION AT A WALL
   soffit and eave gaps  <- spot or C and C
   window frame          <- crack and crevice
   weep holes in brick   <- per label, no flood
   foundation  =====     <- band UP, label height
   ------------=======   <- band OUT, label width
   soil / mulch

Two things the plan carries that the section does not: the band runs along the house foundation under the deck, reached through the skirting access, as well as along the skirting's base, not just around the deck's outer edge, because the deck sits on the ground the pests are crossing, and the 12 ft vegetable bed on the east side breaks the band entirely.

The steps

1. Walk the perimeter once with nothing in your hand. Look for conducive conditions: mulch piled against the siding, a downspout dumping at the foundation, firewood against the wall, ivy on the brick, a gap at the line set entry. You are looking for two things at once, where pests are getting in and where you cannot spray. Skip it and the band goes on blind, you treat over a soaked bed where a downspout will rinse it off the next storm, and the conducive condition that is causing the callback never reaches the report. Record what you find on the shop's form per 'Moisture and Conducive Condition Report'.

2. Move what can be moved, and protect what cannot. Pet bowls, toys, cushions, a kiddie pool and potted herbs come away from the wall before the wand comes out. Close windows on the side you are treating. Anything that stays (the vegetable bed, a fish pond, a bird bath) is marked as a no-spray zone in your head and on the record. Skip it and product lands on a food surface or in water, which is outside the label's sites and is the call nobody wants from a customer.

3. Set the sprayer and start at a fixed corner. Pick the same corner every visit (front left, facing the house, is common) and walk with the wall on the same side the whole lap. Skip it and you lose track of which segment is done, which is how a back wall behind a deck goes untreated for three quarters in a row.

4. Apply the band at the label's height and width, at low pressure with a coarse fan. Low pressure and a coarse pattern keep droplets large and on target. Walk at a steady pace so the output per foot stays even. Shield the nozzle with your free hand or a card near plants. Skip the pressure control and fine droplets drift onto shrubs, windows and the neighbor's car.

5. Treat the entry points as their own task, after the band. Door thresholds, window frames, weep holes, utility penetrations (hose bib, dryer vent, line set, cable entry) and eave gaps get crack-and-crevice or spot treatment only where the label lists them as sites. Use a pin stream or crack-and-crevice tip, not the fan. See related: Crack-and-Crevice Tips, Nozzles and What Each Is For. Skip it and the band works on the crawlers that walk the foundation and misses the ones that climb.

6. Stop at every impervious surface and every water edge. At the driveway, the walk and the patio, either lift the wand or switch to the spot treatment the label allows. Never let the band run onto concrete that slopes to the street. Skip it and the next rain carries product to the storm drain, which is the exact pathway the Environmental Hazards section exists to prevent.

7. Look back along the segment before moving on. Check for puddling at the foundation and for wet streaks running toward a slab edge or downhill. If you see runoff, you applied too much in one place; stop, let it soak, and slow down. Skip it and runoff is invisible by the time the customer's kids are out on the driveway.

8. Restore and tell the customer. Put back what you moved once the band has dried per the label's re-entry instruction, or tell the customer when they may. Tell them which zones you skipped and why.

9. Record the visit. Product, EPA registration number, amount applied, the sites treated and not treated, weather, and the conducive conditions you found, per 'Pesticide Application Record and State Reporting'. Many states require specific fields on a structural application record, and some require a copy left at the property; check your state lead agency.

Worked example: the east wall with the vegetable bed

The job. A quarterly exterior on the ranch in the diagram: 48 ft by 30 ft, so the loop is 48 + 30 + 48 + 30 = 156 linear ft of foundation. Brick veneer with weep holes every few bricks along the bottom course, a slab, a 16 ft garage door in the front wall, a deck the full length of the back, 16 ft deep, on piers with lattice skirting, an AC pad and line set entry on the east wall, and a 12 ft vegetable bed against the east wall north of the AC pad. Forecast: dry for the day, light wind.

The walk (step 1). Ten minutes. Findings: mulch banked up over the weep holes along the front, about 2 in above the bottom course; the back downspout discharging at the foundation; a gap around the line set where the sealant has failed; and ant trails running out from under the deck skirting.

The calls.

• Front wall, 48 ft, of which the garage door takes 16 ft, leaving 32 ft of foundation. The mulch over the weep holes is both a conducive condition and a practical problem: product sprayed onto banked mulch does not reach the foundation where the trails run. You pull the mulch back from the wall by hand along the foundation, apply the band, and write the mulch up as a conducive condition for the customer to keep it below the weep course. The garage door threshold gets crack-and-crevice at the weather seal, not a band across the driveway apron.
• West wall, 30 ft. Full band. The hose bib and dryer vent penetrations get crack-and-crevice where the label lists them. The dryer vent flap itself is not a site; you treat the gap around the hood.
• Back wall, 48 ft. The deck covers the whole 48 ft length to a 16 ft depth. You open the skirting access panel and run the band along the house foundation under the deck where you can reach, and apply along the skirting's base outside. The ant trails start under the deck, so this segment is where the visit is won or lost. The downspout dumping at the foundation goes on the report; a band on saturated soil there will not last.
• East wall, 30 ft. The vegetable bed occupies 12 ft of it, leaving 18 ft. You band the 18 ft, and at the bed you stop. Food crops are a site the general structural label does not list, and a label that does not list a site does not permit it. The line set gap gets crack-and-crevice and goes on the report as an exclusion item: product in a gap that should be sealed buys a quarter, a seal buys years.

The tally. Treated with the band: 32 front + 30 west + 48 back + 18 east = 128 ft. Not banded: 16 ft at the garage door (crack-and-crevice at the seal instead) and 12 ft at the vegetable bed, 28 ft. 128 + 28 = 156 ft, which closes the loop. Every segment is accounted for, and the record shows it rather than claiming "perimeter treated".

The look-back (step 7). At the southeast corner the soil is compacted clay and a wet patch forms at the foundation and starts toward the driveway edge. You stop, let it soak, and take the rest of that wall at a slower pace with the pressure turned down. No product reached the concrete.

What changes the method

A crawlspace or basement house. The band still runs the exterior, but crawl vents and the access door are entry points, and the interior crawl is its own treatment under its own label directions. Do not spray into a vent you have not looked through.

A house on a slope toward a creek, pond or storm inlet. The downhill side gets the most care: lower output, look-back after every few feet, and if the label's water-setback language reaches the site, the band stops short of where the label says. Read Environmental Hazards for any buffer language before you start.

Rain on the way. If the forecast meets the label's weather restriction, the exterior band waits. Interior work, inspection and exclusion still happen. Re-scheduling an exterior is cheaper than explaining fish in the neighbor's pond.

A customer who asks for "just the outside, heavy". More product is not a stronger barrier, it is runoff and a label violation. The answer is the label's band, plus fixing what the walk found.

How to verify you got it right

• The band is continuous on every treatable segment, and the treated plus skipped lengths add back to the full loop.
• No puddling at the foundation, no wet streaks on concrete, nothing on plants, water or food beds.
• Every entry point the label lists as a site got its own crack-and-crevice or spot treatment.
• The conducive conditions you found are on the report with a plain instruction to the customer.
• The record names the product, registration number, amount, sites, skipped zones and weather, and it was written before you left the driveway.

References

• Product label, Directions for Use, Environmental Hazards and Precautionary Statements sections (FIFRA, 7 U.S.C. 136j, makes use inconsistent with the labeling unlawful)
• See related: Pesticide Label Reading and Compliance
• See related: Quarterly Residential Pest Service
• See related: Sprayer Output and Tank Mix Math Worked From the Label
• See related: Pesticide Application Record and State Reporting