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2024 IRC—REROOFING QUIZ (Advanced Level)
1. According to Section R908.1, reroofing projects must comply with the requirements of the IRC except when:
A. The roof slope is greater than 1/2 unit vertical in 12 units horizontal
B. The roof provides positive drainage
C. The new roof covering is the same as the old one
D. The existing roof covering is structurally sound
2. Which of the following is NOT a permitted condition for roof recover according to Section R908.4?
A. The existing roof covering is water-soaked or deteriorated
B. The new roof covering is installed per manufacturer’s instructions
C. A new protective roof coating is applied over an existing coating
D. A metal roof system that transmits loads directly to the structure is used
3. When is the removal of existing roof coverings not required under Section R908.3?
A. If the existing sheathing is water-soaked but structurally sound
B. If an existing self-adhered underlayment cannot be removed without damaging the deck and buildup does not exceed two layers
C. If the roof covering manufacturer allows reroofing without removal
D. If a new metal panel roof is installed over an existing built-up roof
4. What must be done before reusing existing slate, clay, or cement tile roofing materials?
A. They must be coated with a weatherproof membrane
B. They must be inspected and damaged pieces replaced
C. They must be cleaned and pressure-washed before installation
D. They must be primed with a bituminous sealant
5. Under Section R908.4.1, when recovering wood shingles or shakes, what additional requirement applies to prevent concealed combustion?
A. The existing surface must be covered with approved non-combustible materials
B. A fire-resistant underlayment must be applied under the new roof
C. The wood shingles must be completely removed before reroofing
D. A secondary ventilation system must be installed
6. According to Section R908.2, the structural roof components must be capable of:
A. Withstanding twice the anticipated load during installation
B. Supporting the roof covering and installation loads
C. Holding at least three layers of roof covering
D. Maintaining a 1/4-inch slope for drainage
7. In which of the following scenarios is a roof recover not permitted under Section R908.4?
A. When the existing roof has only one previous application of roofing
B. When the existing roof covering is asbestos-cement tile
C. When the new roof covering is thermoplastic single-ply roofing
D. When standing-seam metal panels are installed
8. According to Section R908.6, what must be done before bituminous materials are adhered to metal flashing?
A. The flashing must be treated with a water-resistant coating
B. The flashing must be primed
C. The flashing must be sanded and cleaned
D. The flashing must be inspected and reinstalled as-is
9. When installing a second layer of self-adhered underlayment over an existing one, which of the following conditions must be met?
A. The new underlayment must be thicker than the existing layer
B. Manufacturer approval is required for both the roof covering and the underlayment
C. The new layer must be installed at an angle to the existing one
D. The roof must have a minimum slope of 1/4 unit vertical in 12 units horizontal
10. Which of the following existing roofing conditions requires mandatory removal of all roof coverings before replacement?
A. The existing roof has only one layer of asphalt shingles
B. The existing roof has two or more applications of roof covering
C. The existing roof has a slope of less than 2%
D. The existing roof includes a self-adhered underlayment in good condition
1. According to Section R908.1, reroofing projects must comply with the requirements of the IRC except when:
A. The roof slope is greater than 1/2 unit vertical in 12 units horizontal
B. The roof provides positive drainage
C. The new roof covering is the same as the old one
D. The existing roof covering is structurally sound
2. Which of the following is NOT a permitted condition for roof recover according to Section R908.4?
A. The existing roof covering is water-soaked or deteriorated
B. The new roof covering is installed per manufacturer’s instructions
C. A new protective roof coating is applied over an existing coating
D. A metal roof system that transmits loads directly to the structure is used
3. When is the removal of existing roof coverings not required under Section R908.3?
A. If the existing sheathing is water-soaked but structurally sound
B. If an existing self-adhered underlayment cannot be removed without damaging the deck and buildup does not exceed two layers
C. If the roof covering manufacturer allows reroofing without removal
D. If a new metal panel roof is installed over an existing built-up roof
4. What must be done before reusing existing slate, clay, or cement tile roofing materials?
A. They must be coated with a weatherproof membrane
B. They must be inspected and damaged pieces replaced
C. They must be cleaned and pressure-washed before installation
D. They must be primed with a bituminous sealant
5. Under Section R908.4.1, when recovering wood shingles or shakes, what additional requirement applies to prevent concealed combustion?
A. The existing surface must be covered with approved non-combustible materials
B. A fire-resistant underlayment must be applied under the new roof
C. The wood shingles must be completely removed before reroofing
D. A secondary ventilation system must be installed
6. According to Section R908.2, the structural roof components must be capable of:
A. Withstanding twice the anticipated load during installation
B. Supporting the roof covering and installation loads
C. Holding at least three layers of roof covering
D. Maintaining a 1/4-inch slope for drainage
7. In which of the following scenarios is a roof recover not permitted under Section R908.4?
A. When the existing roof has only one previous application of roofing
B. When the existing roof covering is asbestos-cement tile
C. When the new roof covering is thermoplastic single-ply roofing
D. When standing-seam metal panels are installed
8. According to Section R908.6, what must be done before bituminous materials are adhered to metal flashing?
A. The flashing must be treated with a water-resistant coating
B. The flashing must be primed
C. The flashing must be sanded and cleaned
D. The flashing must be inspected and reinstalled as-is
9. When installing a second layer of self-adhered underlayment over an existing one, which of the following conditions must be met?
A. The new underlayment must be thicker than the existing layer
B. Manufacturer approval is required for both the roof covering and the underlayment
C. The new layer must be installed at an angle to the existing one
D. The roof must have a minimum slope of 1/4 unit vertical in 12 units horizontal
10. Which of the following existing roofing conditions requires mandatory removal of all roof coverings before replacement?
A. The existing roof has only one layer of asphalt shingles
B. The existing roof has two or more applications of roof covering
C. The existing roof has a slope of less than 2%
D. The existing roof includes a self-adhered underlayment in good condition