Georgia CO Exam - WDO
Category Questions and
Complete Solutions
Graded A+
Denning [Date] [Course title]
,Crawlspaces: If you smell a gas leak what should you do? - Answer: Don't go in or get out!
What safety equipment (or PPE) should you wear when in crawlspaces? - Answer: Bump cap, coveralls,
safety glasses, RESPIRATOR, and knee pads
Why is excess moisture in crawl spaces such a big deal to our customers? - Answer: 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? - Answer: True!
What are some ways to remedy water in the crawl space? - Answer: 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? - Answer: No!
Are there ventilation standards in crawl spaces for wood-destroying beetles and fungi? - Answer: Yes!
All ventilation materials (ex: vents, vapor barriers, etc must meet the standard of the
__________________________ code - Answer: International Building Code
How thick should your vapor barrier be? - Answer: 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? - Answer: 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. - Answer: 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).... - Answer: 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)... - Answer: 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? - Answer: 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? - Answer: 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: - Answer: 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? - Answer: 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 - Answer: 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 - Answer: 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
Category Questions and
Complete Solutions
Graded A+
Denning [Date] [Course title]
,Crawlspaces: If you smell a gas leak what should you do? - Answer: Don't go in or get out!
What safety equipment (or PPE) should you wear when in crawlspaces? - Answer: Bump cap, coveralls,
safety glasses, RESPIRATOR, and knee pads
Why is excess moisture in crawl spaces such a big deal to our customers? - Answer: 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? - Answer: True!
What are some ways to remedy water in the crawl space? - Answer: 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? - Answer: No!
Are there ventilation standards in crawl spaces for wood-destroying beetles and fungi? - Answer: Yes!
All ventilation materials (ex: vents, vapor barriers, etc must meet the standard of the
__________________________ code - Answer: International Building Code
How thick should your vapor barrier be? - Answer: 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? - Answer: 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. - Answer: 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).... - Answer: 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)... - Answer: 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? - Answer: 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? - Answer: 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: - Answer: 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? - Answer: 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 - Answer: 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 - Answer: 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
