Transcript VPMA Pre-Treatment Termiticide Application Training

The Cost of Preconstruction
Liquid Termiticide Treatment
Presented by
Dini Miller, Ph.D.
Virginia Tech
Department of
Entomology
Factors that Influence Cost
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Size and complexity
of the treatment site
Size of the spray
tank
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Flow rate
Amount of product
needed
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Product Cost
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Application time
Pre-treat Preparation
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Fill the spray tank
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Calibrate the spray rig
Drive to the site
Determine the area to
be treated
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~15 min for 100 gallon
Measure the slab area
and foundation
Formulate the product
Equipment Calibration
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Add clean water to spray tank,
start pump and set to normal
working pressure.
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Mark 5 gallon bucket at half gallon
increments
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Spray 1 gallon of water into the
bucket using a stopwatch
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Record the time it takes to fill the
bucket to the 1 gallon increment
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Flow rate = 4 gallons/minute
Complexity of Work Site
• Single family home
40 feet
• Concrete foundation
• Must treat the fill under
the slab and the
interior and exterior of
the foundation walls
60 feet
• Floating slab
Calculate the Area to be Treated
• To treat the fill under
• 60 x 40 = 2400 sq ft
• 2400 sq ft /10 =
• 240 gallons to treat the fill
40 feet
60 feet
the slab:
• Label requires 1
gallon of termiticide
be applied for every
10 square feet of fill.
Interior Foundation Walls
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Label required that
foundation wall be treated
using 4 gallons of
termiticide per 10 linear
feet per foot of depth to
the footer.
60 + 60 + 40 + 40 = 200 ft
200 linear ft / 10 = 20 ft
20 x 4 gallons = 80 gallons
80 gallon x 2 (footers 2 ft)
160 gallons to treat
interior of foundation
40 feet
60 feet
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Second trip to treat the
exterior of foundation
walls after final grade.
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Label: 4 gallons of
termiticide per 10 linear
feet per foot of depth to
the footer.
63 + 63 + 42 + 42 = 210 ft
210 linear ft / 10 = 21 ft
21 x 4 gallons = 84 gallons
84 gallon x 2 (footers 2 ft)
168 gallons to treat
exterior of foundation
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63 feet
Exterior Foundation Walls
42 feet
Total Area Treated
• Under slab
• 240 gallons
• 160 gallons
• Foundation exterior
63 feet
• Foundation interior
• 168 gallons
• 560 gallons total
42 feet
Application Time (water on-site)
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Rig flow rate is 4
gallons/minute
Interior treatment requires
400 gallons
100 gallon tank
Application time will be 1
hour and 40 minutes
15 minute tank refills (3)
2 hours 25 minutes total
Price ~$90/hour = $225
Application Time cont.
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Second trip to site
Exterior treatment requires
168 gallons
100 gallon tank
Application time will be 42
minutes
10 minute tank refill (1)
~1 hour at ~90.00/hour
Total for both trips 3.5 hours
Price $225 + $90 = $315
Costs: Time + Product
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Technician Time = $315
• Does not include travel
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Product Price
• Product costs can vary
• Cost of a finished gallon
(fully diluted) is $0.50
• Apply 560 gallons total
• Product cost is $280.00
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Time + Product = $595.00
Additional Costs
• Water located off-site
• More expensive
product is used
• Use of gravel or
aggregate fill
• Lower footer depth
• Additional trips made
to the site to treat
expansion joints,
stoops, etc.
Potential Results of an Incomplete
Treatment
Any Questions?