Georgia CO Exam - WDO Category – Questions and
Answers
Crawlspaces: If you smell a gas leak what should you do? - -Don't go in or get out!
-What safety equipment (or PPE) should you wear when in crawlspaces? - -Bump cap,
coveralls, safety glasses, RESPIRATOR, and knee pads
-Why is excess moisture in crawl spaces such a big deal to our customers? - -Facilitates an
environment for pests that can cause structural and health concerns in addition to being
nuisances.
-T/F: Do customers breath the air from the crawlspace? - -True!
-What are some ways to remedy water in the crawl space? - -Install a new gutter that
slopes down and away from the house (following the grade) OR a sump pump
-Are there ventilation standards in crawl spaces for sub termites? - -No!
-Are there ventilation standards in crawl spaces for wood-destroying beetles and fungi? - -
Yes!
-All ventilation materials (ex: vents, vapor barriers, etc must meet the standard of the
__________________________ code - -International Building Code
-How thick should your vapor barrier be? - -4-6mm
-If a home has an infestation of wood boring beetles on the outside of the home what are
the requirements to treat the crawlspace? - -You do not need to treat the crawlspace or
apply vapor barrier. Wood on the outside should be treated with a pesticide for wood
boring beetles per the label.
-If conducive conditions are discovered within _________ days of treatment and a WDI report
to remedy pests or fungi in a crawl space the PMP must return and remedy the issues free
of charge to the customer. - -90 days
-If less than 90% of the soil in the crawl is covered with a Class 1 vapor barrier
(4 or 6 ml poly).... - -divide the sq. ft. of soil in the crawl by 150...and that equals
the square footage of ventilation that is required to meet the Building Code.
-If 90% or > of the soil of the crawl space is covered with a Class 1 vapor barrier
(4 or 6 ml poly)... - -divide the sq. ft. of soil in the crawl by 1,500...and that equals
the square footage of ventilation that is required to meet the Building Code.
, -What are the minimum treatment standards for the prevention or control
of powder post beetles? - -If the PPB infestation is in the crawl space, at least 70% of the
soil of the crawl space must be covered with a vapor barrier and the under-floor space
must meet the ventilation standards of the International Residential Building Code of 1 & 2
Family Homes.
The application of a pesticide registered by EPA and the Georgia Department of
Agriculture, in strict accordance with the product's registered directions for use.
-What are the minimum standards for the prevention or control of wood
decay fungi? - -When wood decay fungi are present in the crawl space, at least 70% of the
soil of the crawl space must be covered with a vapor barrier and the under-floor space
must meet the ventilation standards of the International Residential Building Code of 1 & 2
Family Homes.
-If the wood decay fungus in the crawl space is water-conducting rot (Poria incrassata), the
additonal treatment measures must be met: - -1. Cut the visible rhizomorphs and scrape
visible fungal growth from the
foundation walls.
2. Removal of all wooden contacts between buildings and inside crawl space
soil, other than those wooden supports which have been treated with
preservatives to a minimum preservative retention designed for ground
contact.
-T/F: Is inadequate ventilation a conducive condition on the Georgia WDI form? - -Yes!
(True)
-Question #1 - How many standard vents (8" x 16") would be needed to meet the
International Residential Building Code for a residential crawl space structure that is 65'
long by 30' wide without a vapor barrier?
2
10
15
20 - -1. 65*30 = 1950 (square footage of crawl space)
2. 1950/150 (since the crawlspace has less than 70% vapor barrier) = 13
3. 13 * 144 (square inches in a foot) = 1,872
4. 1,872/128 (size of the 8X16 vent) = 14.625
5. Since you can't have .625 of a vent you round up to 15
-Question #2 - If that structure in Question #1 had 15 standard vents with a vent within 3'
of each corner of the structure, no vapor barrier and the wood was treated with a product
that is labeled for control of Powder Post Beetles, would that meet the treatment standard
in the Rules of the Structural Pest Control Commission for control of Powder Post Beetles?
YES
NO - -Why NO? Well...remember that in order for it meet the treatment standard for
Powder Post Beetles in the Rules of the Structural Pest Control Commission, at least 70% of
, the soil in the crawl space would need to be covered by a Class 1 vapor barrier (4 mm),
ventilation would have to meet the requirements of the International Residential Building
Code and the wood of the crawl would have to be treated with a product that is labeled for
the control of Powder Post Beetles. It met the standard for the International Residential
Building Code, the wood of the crawl was treated with a product that was labeled for
control of PPBs, but the crawl space had no vapor barrier. If a vapor barrier covered at least
70% of the soil of the crawl, then it would have met the standards.
-How many standard vents would be needed to meet the International Residential Building
Code for a 1,500 square foot residential crawl space structure that has a 4 mm vapor
barrier that overlaps by 6" and is taped, provides 100% coverage of the soil of the crawl
space, and extends up the exterior foundation walls by at least 6" and is taped and secured
to the exterior foundation walls and has mechanical exhaust ventilation that meets the
International Residential Building Code?
0
2
4
24 - -0!
-Question #9 - Which of the following are the 3 conditions which are conducive to wood
destroying organism infestation and must be reported on an Official Georgia Wood
Infestation Inspection Report when you find it on a home that you are inspecting for the
sale of the property?
1. Wood within 6" of the soil
2. Wood touching the soil
3. Cellulose debris in the crawl space
4. Inadequate ventilation - -Wood touching the soil, cellulose debris in the crawl space, and
inadequate ventilation
*Wood within 6" of the soil that is not treated for ground contact must either be removed,
properly insulated or Waived using the Official Waiver form for the prevention or the
control of subterranean termites, but untreated wood must be touching soil to be
considered a condition which is conducive to wood destroying organism infestation on an
Official Georgia Wood Infestation Inspection Report.
-When do Lyctid (true powerpost beetles) usually emerge? - -December to early spring
-When do Anobiid beetles usually emerge? - -April to June
-Old House Borer - -June to August
-Exit size holes and shapes of beetles (LABO) - -Lyctid: Round shape 1/32-1/16
Anobiid: round, 1/16-1/8
Bostrichid: round, 1/8-3/8
Old House borer: oval, 1/4-3/8
Answers
Crawlspaces: If you smell a gas leak what should you do? - -Don't go in or get out!
-What safety equipment (or PPE) should you wear when in crawlspaces? - -Bump cap,
coveralls, safety glasses, RESPIRATOR, and knee pads
-Why is excess moisture in crawl spaces such a big deal to our customers? - -Facilitates an
environment for pests that can cause structural and health concerns in addition to being
nuisances.
-T/F: Do customers breath the air from the crawlspace? - -True!
-What are some ways to remedy water in the crawl space? - -Install a new gutter that
slopes down and away from the house (following the grade) OR a sump pump
-Are there ventilation standards in crawl spaces for sub termites? - -No!
-Are there ventilation standards in crawl spaces for wood-destroying beetles and fungi? - -
Yes!
-All ventilation materials (ex: vents, vapor barriers, etc must meet the standard of the
__________________________ code - -International Building Code
-How thick should your vapor barrier be? - -4-6mm
-If a home has an infestation of wood boring beetles on the outside of the home what are
the requirements to treat the crawlspace? - -You do not need to treat the crawlspace or
apply vapor barrier. Wood on the outside should be treated with a pesticide for wood
boring beetles per the label.
-If conducive conditions are discovered within _________ days of treatment and a WDI report
to remedy pests or fungi in a crawl space the PMP must return and remedy the issues free
of charge to the customer. - -90 days
-If less than 90% of the soil in the crawl is covered with a Class 1 vapor barrier
(4 or 6 ml poly).... - -divide the sq. ft. of soil in the crawl by 150...and that equals
the square footage of ventilation that is required to meet the Building Code.
-If 90% or > of the soil of the crawl space is covered with a Class 1 vapor barrier
(4 or 6 ml poly)... - -divide the sq. ft. of soil in the crawl by 1,500...and that equals
the square footage of ventilation that is required to meet the Building Code.
, -What are the minimum treatment standards for the prevention or control
of powder post beetles? - -If the PPB infestation is in the crawl space, at least 70% of the
soil of the crawl space must be covered with a vapor barrier and the under-floor space
must meet the ventilation standards of the International Residential Building Code of 1 & 2
Family Homes.
The application of a pesticide registered by EPA and the Georgia Department of
Agriculture, in strict accordance with the product's registered directions for use.
-What are the minimum standards for the prevention or control of wood
decay fungi? - -When wood decay fungi are present in the crawl space, at least 70% of the
soil of the crawl space must be covered with a vapor barrier and the under-floor space
must meet the ventilation standards of the International Residential Building Code of 1 & 2
Family Homes.
-If the wood decay fungus in the crawl space is water-conducting rot (Poria incrassata), the
additonal treatment measures must be met: - -1. Cut the visible rhizomorphs and scrape
visible fungal growth from the
foundation walls.
2. Removal of all wooden contacts between buildings and inside crawl space
soil, other than those wooden supports which have been treated with
preservatives to a minimum preservative retention designed for ground
contact.
-T/F: Is inadequate ventilation a conducive condition on the Georgia WDI form? - -Yes!
(True)
-Question #1 - How many standard vents (8" x 16") would be needed to meet the
International Residential Building Code for a residential crawl space structure that is 65'
long by 30' wide without a vapor barrier?
2
10
15
20 - -1. 65*30 = 1950 (square footage of crawl space)
2. 1950/150 (since the crawlspace has less than 70% vapor barrier) = 13
3. 13 * 144 (square inches in a foot) = 1,872
4. 1,872/128 (size of the 8X16 vent) = 14.625
5. Since you can't have .625 of a vent you round up to 15
-Question #2 - If that structure in Question #1 had 15 standard vents with a vent within 3'
of each corner of the structure, no vapor barrier and the wood was treated with a product
that is labeled for control of Powder Post Beetles, would that meet the treatment standard
in the Rules of the Structural Pest Control Commission for control of Powder Post Beetles?
YES
NO - -Why NO? Well...remember that in order for it meet the treatment standard for
Powder Post Beetles in the Rules of the Structural Pest Control Commission, at least 70% of
, the soil in the crawl space would need to be covered by a Class 1 vapor barrier (4 mm),
ventilation would have to meet the requirements of the International Residential Building
Code and the wood of the crawl would have to be treated with a product that is labeled for
the control of Powder Post Beetles. It met the standard for the International Residential
Building Code, the wood of the crawl was treated with a product that was labeled for
control of PPBs, but the crawl space had no vapor barrier. If a vapor barrier covered at least
70% of the soil of the crawl, then it would have met the standards.
-How many standard vents would be needed to meet the International Residential Building
Code for a 1,500 square foot residential crawl space structure that has a 4 mm vapor
barrier that overlaps by 6" and is taped, provides 100% coverage of the soil of the crawl
space, and extends up the exterior foundation walls by at least 6" and is taped and secured
to the exterior foundation walls and has mechanical exhaust ventilation that meets the
International Residential Building Code?
0
2
4
24 - -0!
-Question #9 - Which of the following are the 3 conditions which are conducive to wood
destroying organism infestation and must be reported on an Official Georgia Wood
Infestation Inspection Report when you find it on a home that you are inspecting for the
sale of the property?
1. Wood within 6" of the soil
2. Wood touching the soil
3. Cellulose debris in the crawl space
4. Inadequate ventilation - -Wood touching the soil, cellulose debris in the crawl space, and
inadequate ventilation
*Wood within 6" of the soil that is not treated for ground contact must either be removed,
properly insulated or Waived using the Official Waiver form for the prevention or the
control of subterranean termites, but untreated wood must be touching soil to be
considered a condition which is conducive to wood destroying organism infestation on an
Official Georgia Wood Infestation Inspection Report.
-When do Lyctid (true powerpost beetles) usually emerge? - -December to early spring
-When do Anobiid beetles usually emerge? - -April to June
-Old House Borer - -June to August
-Exit size holes and shapes of beetles (LABO) - -Lyctid: Round shape 1/32-1/16
Anobiid: round, 1/16-1/8
Bostrichid: round, 1/8-3/8
Old House borer: oval, 1/4-3/8
