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HAAG Roof Inspector practice questions

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Question 1Residential Roofing

On a standard asphalt shingle roof, which component is installed beneath the shingles along the eaves to prevent water from being driven up under the shingle course by wind?

  1. Ice and water shield
  2. Starter strip Correct answer.
  3. Felt underlayment
  4. Drip edge flashing

Explanation

A starter strip is a factory-made or field-cut shingle course laid along the eave beneath the first full course, with adhesive sealant positioned to bond the overlying shingles and resist wind uplift at the vulnerable eave edge. Drip edge manages runoff at the edge but does not seal the first course to the shingles above it.

Question 2Residential Roofing

What is the primary purpose of roof deck ventilation in a residential attic?

  1. To eliminate the need for underlayment beneath the shingles
  2. To increase the structural load capacity of the roof deck
  3. To reduce moisture buildup and heat accumulation in the attic space Correct answer.
  4. To provide a mounting surface for ridge caps

Explanation

Balanced intake and exhaust ventilation moves air through the attic, carrying away moisture that would otherwise condense on framing and sheathing and reducing heat buildup that shortens shingle life. Ventilation does not add structural capacity or substitute for underlayment.

Question 3Residential Roofing

A roof has a horizontal run of 12 feet and rises 6 feet over that run. What is the roof slope expressed as a pitch ratio?

  1. 6:12 Correct answer.
  2. 12:6
  3. 2:12
  4. 3:12

Explanation

Roof pitch is expressed as inches of rise per 12 inches of horizontal run. A 6-foot rise over a 12-foot run reduces to 6 inches of rise per 12 inches of run, or 6:12.

Question 4Residential Roofing

Which roofing material is most commonly associated with a minimum slope requirement of 4:12 for standard installation?

  1. Clay barrel tile
  2. Asphalt composition shingles Correct answer.
  3. Standing seam metal panels
  4. EPDM single-ply membrane

Explanation

Standard asphalt composition shingles are typically limited to slopes of 4:12 and steeper unless special underlayment provisions are used, because lower slopes allow water to migrate laterally under the shingle tabs. Metal, tile, and single-ply systems have their own slope limits and installation methods.

Question 5Residential Roofing

During a roof inspection, you observe that shingle tabs are curling upward at the edges across the entire south-facing slope. Which condition is the most likely cause?

  1. Weathering and thermal cycling of an aged roof Correct answer.
  2. Insufficient attic intake ventilation
  3. Mechanical damage from foot traffic
  4. Improperly driven roofing nails

Explanation

Widespread upward curling of shingle tabs across an entire slope is a classic sign of age-related weathering and thermal cycling, where the asphalt loses volatiles and the mat shrinks. Localized patterns would suggest mechanical damage or fastening issues rather than uniform aging.

Question 6Residential Roofing

What is the purpose of a cricket (saddle) on a residential roof?

  1. To divert water around a chimney or other large projection Correct answer.
  2. To seal the gap between the drip edge and the fascia
  3. To provide a mounting point for a satellite dish
  4. To reinforce the ridge line against wind uplift

Explanation

A cricket is a small peaked roof frame built on the uphill side of a chimney or similar wide projection to divert water around it, preventing ponding and leakage behind the obstruction. It is a water-shedding detail, not a structural or attachment feature.

Question 7Residential Roofing

Which fastener is appropriate for attaching asphalt shingles to a roof deck?

  1. Staples with a 1/2-inch crown
  2. Drywall screws
  3. Galvanized roofing nails with a minimum 3/8-inch head Correct answer.
  4. Common nails driven flush with the shingle surface

Explanation

Manufacturers specify corrosion-resistant roofing nails, typically galvanized or stainless, with a head diameter of at least 3/8 inch so the head holds the shingle without cutting through. Screws and staples are not approved for standard shingle attachment, and nails driven flush damage the shingle.

Question 8Residential Roofing

A homeowner reports a water stain on the ceiling below a valley. Which inspection step is most appropriate first?

  1. Add a second layer of underlayment over the entire roof
  2. Apply sealant to the interior ceiling stain
  3. Inspect the valley flashing and the intersection of the two roof planes Correct answer.
  4. Replace all shingles on the adjacent slopes

Explanation

A leak at a valley most often originates at the valley flashing or where the two roof planes intersect, so the inspector should examine that area for open laps, damaged metal, or debris dams before recommending any repair. Replacing shingles or adding underlayment without locating the source wastes effort.

Question 9Residential Roofing

Which of the following best describes the function of underlayment on a residential roof?

  1. It adds structural rigidity to the roof deck
  2. It serves as a secondary moisture barrier beneath the roof covering Correct answer.
  3. It reflects ultraviolet radiation away from the shingles
  4. It provides the primary waterproof barrier for the roof system

Explanation

Underlayment is a secondary barrier installed over the deck and beneath the roof covering; it sheds water that gets past the shingles but is not intended as the primary weatherproofing layer. Structural rigidity comes from framing and sheathing, and UV reflection is a property of certain shingle surfaces, not underlayment.

Question 10Residential Roofing

An inspector notes that the step flashing along a sidewall is installed with each piece lapped over the shingle course below rather than woven with it. What is the correct relationship between step flashing and shingles?

  1. Step flashing should be installed beneath the shingles, with each shingle course overlapping the flashing Correct answer.
  2. Step flashing should be installed only at the eave and never along sidewalls
  3. Step flashing should be sealed to the wall with no fasteners
  4. Step flashing should be installed over the shingles with no shingle overlap

Explanation

Step flashing is an L-shaped metal piece installed at the wall-roof junction so that each shingle course overlaps the flashing below it, keeping water on the roof surface and out of the wall. The flashing is not laid over the shingles, and it is required along sidewalls, not just at eaves.

Question 11Residential Roofing

When inspecting a roof with a slope of 3:12, which safety consideration is most relevant?

  1. The slope requires fall protection because it is below the typical walkable threshold Correct answer.
  2. The slope is generally considered too steep for standard shingle installation
  3. The slope is walkable without fall protection
  4. The slope eliminates the need for a ridge vent

Explanation

Roofs with slopes below about 4:12 are often considered non-walkable for routine inspection without fall protection, and many standards require fall protection at lower thresholds. Slope also affects shingle installation requirements, but a 3:12 slope does not eliminate ridge ventilation.

Question 12Residential Roofing

What does a visible dark shadow or 'ghosting' along the shadow lines of a roof deck indicate during an inspection?

  1. The presence of a ridge vent
  2. Correctly lapped step flashing
  3. A possible indication of missing or inadequate underlayment or decking moisture Correct answer.
  4. A properly installed ice dam membrane

Explanation

Shadowing or ghosting on a roof deck can indicate moisture-related staining, missing underlayment, or uneven decking that allows water to penetrate. It is a diagnostic clue rather than confirmation of a properly installed component.

Question 13Residential Roofing

A roof inspection reveals that the drip edge at the rake is installed over the underlayment rather than under it. Why is this a concern?

  1. It prevents proper shingle alignment at the rake
  2. It increases the risk of wind uplift at the ridge
  3. It voids the manufacturer's warranty on the ridge vent
  4. It allows water to get behind the drip edge and under the underlayment Correct answer.

Explanation

At the rake, the drip edge should be installed so that water shedding off the roof is directed away from the fascia and not behind the edge metal. Installing it over the underlayment can allow water to migrate behind the drip edge and under the underlayment, promoting rot at the fascia and sheathing.

Question 14Residential Roofing

Which condition would most likely cause premature failure of asphalt shingles on a low-slope roof?

  1. Properly installed ice and water shield at the eaves
  2. Correctly sized drip edge
  3. Insufficient underlayment or shingles installed below the manufacturer's minimum slope Correct answer.
  4. Adequate attic ventilation

Explanation

Asphalt shingles rely on steep slope to shed water quickly; when installed below the manufacturer's minimum slope without enhanced underlayment, water can migrate laterally under the tabs and cause premature failure. Ventilation, ice shield, and drip edge are supportive details but do not compensate for an inadequate slope.

Question 15Residential Roofing

What is the recommended method for inspecting a roof from the ground when access to the roof surface is unsafe?

  1. Rely solely on the homeowner's description of the roof
  2. Use binoculars to examine the roof surface and note visible defects for closer inspection Correct answer.
  3. Remove shingles at the eave to inspect the deck
  4. Climb onto the roof only at the ridge

Explanation

When roof access is unsafe, a ground-level inspection using binoculars allows the inspector to document visible defects such as missing shingles, flashing damage, or sagging, and to recommend a closer inspection by qualified personnel. Climbing at the ridge or removing shingles is unsafe and destructive.

Question 16Residential Roofing

An inspector observes that the ridge cap shingles are lifting and the ridge vent is blocked by insulation. What is the most likely consequence?

  1. Increased shingle adhesion along the ridge
  2. Improved attic ventilation and reduced moisture
  3. Reduced attic ventilation, leading to moisture buildup and heat accumulation Correct answer.
  4. Decreased risk of ice damming at the eaves

Explanation

A blocked ridge vent prevents exhaust air from leaving the attic, reducing ventilation effectiveness and allowing moisture and heat to accumulate, which can damage sheathing and shorten roof life. Lifting ridge caps also expose fasteners and increase leak risk.

Question 17Residential Roofing

Which of the following is a correct description of the purpose of a kick-out flashing?

  1. To direct water away from a wall at the bottom of a roof-to-wall intersection Correct answer.
  2. To cover the exposed ends of rafters at the eave
  3. To seal the ridge vent against wind-driven rain
  4. To anchor the gutter to the fascia

Explanation

Kick-out flashing is installed at the lower end of a roof-to-wall intersection to divert water away from the wall and into the gutter, preventing water from running down the siding and causing rot. It is a water-diversion detail, not a structural or sealing component.

Question 18Residential Roofing

A homeowner asks whether a roof with 20-year shingles installed 18 years ago needs replacement. Which factor is most important in the inspector's recommendation?

  1. The presence of granule loss, curling, and visible leaks Correct answer.
  2. The brand of the shingles
  3. The color of the shingles
  4. The age of the shingles alone

Explanation

Shingle age is only a rough guide; the decision should be based on observable condition such as granule loss, curling, cracking, and evidence of leaks. Color and brand do not determine remaining service life.

Question 19Residential Roofing

What is the primary function of a roof ridge vent in a residential roof system?

  1. To provide a mounting surface for the ridge cap
  2. To reinforce the ridge board structurally
  3. To exhaust hot, moist air from the attic Correct answer.
  4. To prevent ice dams at the eaves

Explanation

A ridge vent is an exhaust ventilation component that allows hot, moist air to escape from the attic at the ridge, working with intake vents at the soffit. It does not add structural reinforcement or prevent ice dams by itself.

Question 20Residential Roofing

During an inspection, you find that a chimney is wider than 30 inches and has no cricket on the uphill side. What is the most likely risk?

  1. Improper shingle alignment at the rake
  2. Water ponding and leaking behind the chimney Correct answer.
  3. Premature failure of the ridge vent
  4. Increased wind uplift at the ridge

Explanation

Chimneys wider than about 30 inches require a cricket to divert water around them; without one, water can pond behind the chimney and penetrate the flashing, causing leaks. The issue is water management, not wind uplift or shingle alignment.

Question 21Residential Roofing

An inspector notices that the roof sheathing is sagging between rafters in several locations. Which cause is most consistent with this observation?

  1. Properly installed ice and water shield
  2. Adequate attic ventilation
  3. Undersized or deteriorated sheathing panels Correct answer.
  4. Correctly spaced rafter blocking

Explanation

Sagging between rafters typically indicates that the sheathing is undersized, deteriorated from moisture, or inadequately supported. Proper flashing, blocking, and ventilation are supportive details and would not produce sagging.

Question 22Residential Roofing

A roof has a slope of 2:12 and the homeowner wants to install standard asphalt shingles. What is the most accurate statement regarding this plan?

  1. Standard shingles are not permitted below 4:12 unless a double underlayment or manufacturer-approved system is used Correct answer.
  2. Standard shingles are permitted on any slope as long as the attic is ventilated
  3. Standard shingles can be installed only if the roof is stripped to the deck
  4. Standard shingles can be installed without special provisions because the slope is above 1:12

Explanation

Most asphalt shingle manufacturers require a minimum slope of 4:12 for standard installation, with lower slopes permitted only when a double underlayment or a manufacturer-approved low-slope system is used. Ventilation alone does not override the slope requirement.

Question 23Residential Roofing

Which observation during a roof inspection most strongly suggests that ice damming has been occurring?

  1. Shingles curling at the ridge
  2. Uniform granule loss across the entire roof
  3. Missing shingles at the rake
  4. A band of deteriorated shingles and staining along the eave, with ice shield visible Correct answer.

Explanation

Ice damming typically shows as a band of deterioration, staining, or moisture damage along the eave where meltwater refreezes and backs up under the shingles. Uniform granule loss or localized defects at the ridge or rake do not specifically indicate ice damming.

Question 24Residential Roofing

An inspector finds that the roof-to-wall intersection has no headwall flashing and the siding is in direct contact with the roof surface. What is the most significant concern?

  1. The attic ventilation will be improved
  2. Water can enter behind the siding and cause rot at the wall and roof intersection Correct answer.
  3. The shingles will adhere more tightly to the wall
  4. The roof slope will be reduced

Explanation

Without headwall flashing, water running down the wall can penetrate behind the siding and into the wall assembly, causing rot and interior leaks. Siding should be held above the roof surface with proper flashing to shed water.

Question 25Residential Roofing

Which combination of conditions would most likely warrant recommending a full roof replacement rather than a spot repair?

  1. A clogged gutter at one corner
  2. Widespread granule loss, multiple curled tabs, and evidence of active leaks across several slopes Correct answer.
  3. Loose flashing at one chimney
  4. A single missing shingle on an otherwise sound roof

Explanation

Widespread deterioration combined with active leaks across multiple slopes indicates that the roof is at or beyond the end of its service life, making spot repair impractical. Isolated defects such as a single missing shingle or loose flashing can be repaired individually.

Question 26Residential Roofing

Which roofing term describes the exposed length of an asphalt shingle that remains visible after the next course is installed over it?

  1. Selvage
  2. Headlap
  3. Deck span
  4. Exposure Correct answer.

Explanation

Exposure is the portion of a shingle course left uncovered to the weather. It is measured vertically and, combined with headlap, determines how many layers of material protect any given point on the roof. Manufacturers specify exposure on the wrapper because exceeding it voids warranties and reduces weather resistance.

Question 27Residential Roofing

What is the standard minimum roof slope at which most asphalt shingle manufacturers permit installation without a special low-slope underlayment system?

  1. 1:12
  2. 6:12
  3. 4:12
  4. 2:12 Correct answer.

Explanation

Most asphalt shingle manufacturers allow standard installation down to a 2:12 slope, and below that they require a doubled underlayment or a membrane system. Roofs between 2:12 and 4:12 typically need a double layer of underlayment as extra protection against wind-driven rain and ice backup. Anything below 2:12 generally calls for a different roofing material entirely.

Question 28Residential Roofing

During a walk-around, an inspector sees that the fascia board along the rake has rotted and the paint is peeling near the gable edge. Which deficiency is the most probable root cause?

  1. Shingle granules clogging the gutter and backing water under the first course
  2. Insufficient attic ventilation causing condensation on the fascia
  3. Undersized downspouts discharging too close to the foundation
  4. Missing or improperly installed rake drip edge allowing water to wick back Correct answer.

Explanation

At a rake edge, the drip edge must direct water away from the fascia and into the shingle field rather than behind it. When the rake drip edge is missing or lapped incorrectly, water tracks down the barge rafter and rots the fascia. Peeling paint at the gable edge is a classic secondary indicator of this condition.

Question 29Residential Roofing

Which term identifies the horizontal distance from the eave to the ridge measured in plan view, used when calculating roof area from slope?

  1. Overhang
  2. Run Correct answer.
  3. Rise
  4. Pitch

Explanation

Run is the horizontal projection of the roof slope, measured in plan view from eave to ridge. Rise is the vertical change over that run, and the ratio of rise to run expressed over 12 units defines the slope. Roof area is calculated by multiplying the plan area by a slope factor derived from the rise and run.

Question 30Residential Roofing

An inspector observes that the shingle tabs on a south-facing slope are curling and cracking while the north slope appears serviceable. Which cause best explains this pattern?

  1. Inadequate ridge ventilation affecting the whole attic equally
  2. Thermal cycling and ultraviolet degradation concentrated on the sun-exposed slope Correct answer.
  3. Improper nailing pattern used on the entire roof
  4. Foot traffic damage from the original installation crew

Explanation

South-facing slopes receive the most solar radiation, so they experience the greatest ultraviolet exposure and the widest daily temperature swings. That combination drives the loss of volatiles in the asphalt and differential movement that produces curling and cracking. A single-slope failure pattern that tracks sun exposure points to weathering rather than installation error.

Question 31Residential Roofing

What is the primary purpose of a roof underlayment when installed beneath asphalt shingles?

  1. To add structural stiffness to the roof deck
  2. To reflect solar heat away from the attic
  3. To provide a secondary water-shedding layer that protects the deck before and between shingle courses Correct answer.
  4. To bond the shingles to the sheathing

Explanation

Underlayment is a secondary barrier that sheds water that gets past the shingles and protects the deck while the roof is open during installation. It is not structural and does not adhere the shingles. Certain membranes also serve as ice-dam protection at eaves, but their core function remains water management.

Question 32Residential Roofing

Which component is designed to close the gap between the roof deck and the top of the wall at a sloped-roof-to-wall intersection?

  1. Counterflashing
  2. Headwall flashing Correct answer.
  3. Valley flashing
  4. Apron flashing

Explanation

Headwall flashing is the L-shaped or bent metal that spans the joint where a sloped roof meets a vertical wall above it. It is integrated with the underlayment and shingle courses so water running down the wall is directed onto the roof surface. Apron flashing serves the low side of a penetration, and counterflashing is embedded in the wall to cover the top edge.

Question 33Residential Roofing

An inspector notices dark staining and moss growth concentrated along the north slope of a roof below a large shade tree. Which condition should be reported?

  1. Undersized roof sheathing panels
  2. Excessive attic exhaust ventilation
  3. Insufficient number of shingle fasteners
  4. Prolonged moisture retention from shade and organic debris Correct answer.

Explanation

Shaded slopes dry slowly and collect leaf litter and organic debris, creating the damp environment that algae, moss, and lichen require. The staining and growth are indicators of prolonged surface moisture rather than a fastening or structural defect. Reporting the moisture retention and recommending debris removal and possibly zinc or copper strips addresses the cause.

Question 34Residential Roofing

A roof has a 5:12 slope. Using the slope factor for that pitch, approximately what roof surface area corresponds to a 2,000 square foot plan footprint?

  1. 2,000 square feet
  2. 2,170 square feet Correct answer.
  3. 2,600 square feet
  4. 2,400 square feet

Explanation

The slope factor for a 5:12 roof is about 1.083, obtained from the square root of one plus the ratio of rise to run squared. Multiplying the 2,000 square foot footprint by 1.083 yields roughly 2,170 square feet. Inspectors use this conversion to sanity-check material quantities and contractor estimates.

Question 35Residential Roofing

An inspector finds that the closed-cut valley on a roof has the shingles from one plane stopping short of the valley centerline, leaving exposed underlayment visible. What is the correct assessment?

  1. The valley should be covered with a single layer of roll roofing
  2. The exposed underlayment indicates the roof was never completed
  3. The valley termination is defective because shingles must extend across the centerline before being cut Correct answer.
  4. The valley is correctly woven and needs no comment

Explanation

In a closed-cut valley, the shingles from the secondary plane must extend across the valley centerline by at least a foot before being cut parallel to the centerline. Stopping short of the centerline leaves the valley membrane exposed to direct water flow and abrasion. This is an installation defect that should be reported for correction.

Question 36Residential Roofing

During an inspection, the inspector notes that the plumbing vent boot has a cracked rubber collar and the nails at its base are exposed. Which recommendation is most appropriate?

  1. Replace the vent boot and seal the base fasteners Correct answer.
  2. Leave it as is because vent boots are not part of the roof system
  3. Apply roof cement over the cracked collar only
  4. Replace the entire roof section around the vent

Explanation

A cracked boot collar is a common leak source, and the repair is to replace the boot with a properly sized new one. Exposed fasteners at the base should be sealed because they penetrate the shingle surface and can back water out. Roof cement alone is a temporary patch that fails as the rubber continues to deteriorate.

Question 37Residential Roofing

An inspector observes that the roof sheathing panels are spaced tightly with no visible gaps at the butt joints. Which issue should be flagged?

  1. Inadequate nailing along the panel perimeter
  2. Reduced wind uplift resistance at the panel edges
  3. Risk of buckling and ridging as the panels expand with moisture Correct answer.
  4. Increased risk of ice damming at the eaves

Explanation

Wood structural panels expand and contract with moisture changes, so manufacturers require a small gap at panel edges. When panels are butted tightly, expansion can push them together and cause buckling or telegraphing through the shingles. The gap requirement is a sheathing installation issue, not a fastening or ventilation concern.

Question 38Residential Roofing

A homeowner reports that water drips from the soffit during heavy rain but the ceiling inside remains dry. Which condition is the most likely explanation?

  1. Water entering the eave through a gap between the drip edge and the gutter Correct answer.
  2. A leak at the roof-to-wall flashing entering the wall cavity
  3. Condensation forming on the cold attic sheathing
  4. A failed seal at the plumbing vent boot

Explanation

Water appearing at the soffit while the interior stays dry usually indicates entry at the eave, where wind-driven rain can get behind the drip edge or overshoot the gutter. The water then travels along the soffit framing and drips out. Interior staining would be expected if the leak were higher on the roof plane.

Question 39Residential Roofing

Which condition at a chimney most strongly indicates that the flashing was installed without proper counterflashing?

  1. The chimney has a concrete crown with a slight slope
  2. The chimney flue has a spark arrestor cap installed
  3. The chimney is located on the downhill side of the ridge
  4. The base flashing is sealed to the masonry with surface caulk and shows separation at the top edge Correct answer.

Explanation

Counterflashing is cut into the masonry so the top edge of the base flashing is protected behind a reglet or embedded metal. When installers rely on surface caulk instead, the seal at the top edge separates as the caulk ages, allowing water behind the flashing. A crown, location, and cap are unrelated to the flashing termination detail.

Question 40Residential Roofing

An inspector finds that the roof has a single layer of 15-pound felt under shingles on a 6:12 slope and no ice-dam membrane at the eaves in a cold climate. Which statement is most accurate?

  1. The installation meets minimum requirements because the slope exceeds 4:12
  2. The felt weight is too heavy for a 6:12 slope
  3. The roof requires a fully adhered membrane across the entire surface
  4. The installation lacks required ice-dam protection at the eaves for the climate Correct answer.

Explanation

In cold climates, building codes and manufacturer instructions require an ice-dam protection membrane along the eaves extending inward from the exterior wall line. A 6:12 slope does not exempt the roof from that requirement. The absence of eave membrane is the reportable deficiency.

Question 41Residential Roofing

An inspector observes that the ridge vent is present but the attic has no soffit vents and the insulation touches the roof deck at the eaves. What is the most likely consequence?

  1. The ridge vent will pull air from the conditioned space below through gaps in the ceiling Correct answer.
  2. The soffit will begin to rot from excessive airflow
  3. The ridge vent will function normally because exhaust vents do not need intake
  4. The attic will be over-ventilated and the shingles will cool too quickly

Explanation

Exhaust vents such as a ridge vent require a balanced intake at the soffits to move air through the attic. Without soffit vents, the ridge vent draws replacement air from the conditioned space through ceiling penetrations, which raises moisture and energy costs. Blocked eave vents compound the problem by eliminating the intended intake path.

Question 42Residential Roofing

A roof is being inspected after a hail event, and the inspector finds soft spots on the shingle mat that feel like a bruise. Which conclusion is best supported?

  1. The shingles are exhibiting normal granule variation
  2. The shingles were installed with too many fasteners
  3. The shingles have sustained impact damage that may compromise the mat Correct answer.
  4. The shingles have reached the end of their service life from normal weathering

Explanation

A soft, bruised spot where granules are displaced is the classic signature of hail impact on an asphalt shingle. The impact can fracture the mat beneath the surface, reducing the shingle's remaining life even if no hole is visible. Documenting the location, size, and pattern of such marks supports an accurate damage assessment.

Question 43Residential Roofing

Which observation during an inspection best indicates that the roof has been subjected to repeated foot traffic damage?

  1. Rust staining around the vent penetrations
  2. Uniform granule loss across the entire south slope
  3. Cracking at the shingle tabs on all slopes
  4. Localized areas of crushed or displaced granules along valleys and ridges Correct answer.

Explanation

Foot traffic concentrates along the natural travel paths, which are valleys, ridges, and routes to roof-mounted equipment. Crushed and displaced granules in those localized bands are the characteristic pattern. Uniform loss across a slope points to weathering, and rust around penetrations points to fastener corrosion.

Question 44Residential Roofing

An inspector is evaluating a roof with two layers of asphalt shingles and a 3:12 slope. Which finding would most strongly support recommending removal of the existing layers rather than a recover?

  1. The existing shingles are 12 years old
  2. The existing shingles are curled and the deck has soft spots Correct answer.
  3. The roof has a ridge vent installed
  4. The homeowner wants a different shingle color

Explanation

Recovering over an existing roof is limited by the number of layers allowed and by the condition of the deck and existing shingles. Curled shingles prevent a flat new surface, and soft deck spots indicate moisture damage that must be repaired. Those conditions favor a tear-off so the deck can be inspected and replaced as needed.

Question 45Residential Roofing

What is the purpose of a kick-out flashing at the bottom of a roof-to-wall intersection?

  1. To support the weight of the gutter at the eave
  2. To divert water away from the wall and into the gutter rather than allowing it to run down the siding Correct answer.
  3. To vent the wall cavity behind the siding
  4. To seal the gap between the roof deck and the wall sheathing

Explanation

Kick-out flashing is a small angled piece at the base of a sidewall that throws water out onto the roof or into the gutter. Without it, water running down the wall flashing continues onto the siding and behind it, causing rot and staining. It is a water-diversion detail, not a structural or ventilation component.

Question 46Residential Roofing

An inspector finds that the step flashing along a sidewall is installed with each piece lapped over the shingle course below rather than under the course above. What is the result?

  1. The shingles will not seal to the step flashing
  2. The roof will fail only if the slope is below 4:12
  3. The wall flashing becomes more watertight than a standard installation
  4. Water is directed behind the shingles and into the wall assembly Correct answer.

Explanation

Step flashing must be woven with the shingle courses so each piece sits under the course above and over the course below. Reversing that lap lets water run behind the shingles and into the wall. The lap direction is critical on any slope, not just low-slope roofs.

Question 47Residential Roofing

A roof inspection reveals that the shingles are installed with four nails per shingle on a roof in a high-wind zone. Which recommendation is most appropriate?

  1. No action is needed because four nails meets all conditions
  2. Use staples instead of nails to improve holding power
  3. Reduce the number of nails to avoid splitting the shingles
  4. Increase fastening to six nails per shingle as required for high-wind areas Correct answer.

Explanation

Manufacturers and codes require additional fasteners in high-wind zones, commonly six nails per shingle for standard three-tab products. Four nails is the baseline for normal conditions and may not provide the required uplift resistance in a wind zone. The inspector should recommend upgrading the fastening pattern to match the design wind speed.

Question 48Residential Roofing

An inspector observes that the shingles on a low-slope porch roof are installed directly over the previous layer with no underlayment between them. Which issue is most significant?

  1. The old shingles will act as a vapor barrier and cause condensation
  2. The shingles will fail because the slope is below 4:12
  3. The new shingles will not adhere to the old surface
  4. The absence of underlayment prevents a secondary water barrier and may void the warranty Correct answer.

Explanation

Recover installations still require an underlayment between the old and new shingle layers to provide a secondary barrier and meet manufacturer requirements. Omitting it can void the warranty and leaves no protection if water gets past the new shingles. The slope itself may be acceptable if the manufacturer permits shingles at that pitch with the proper system.

Question 49Residential Roofing

A homeowner reports that a ceiling stain appears only after wind-driven rain from the east. Which inspection approach is most likely to identify the source?

  1. Check the attic ventilation calculations for the whole house
  2. Inspect the roof from the ground with binoculars and report the stain as weather-related
  3. Recommend replacing all shingles on the east slope
  4. Examine the east-facing penetrations, wall intersections, and flashing details for gaps open to wind-driven rain Correct answer.

Explanation

Staining that correlates with wind direction points to a defect on the windward side that admits water only under pressure. The inspector should focus on penetrations, sidewall and headwall flashing, and any open laps on that exposure. Ground observation and ventilation calculations do not isolate a wind-driven entry point.

Question 50Residential Roofing

An inspector finds that a skylight curb is flashed with the metal lapped over the shingles on the uphill side and under the shingles on the downhill side. What is the correct evaluation?

  1. The flashing is reversed and will trap water at the curb Correct answer.
  2. The flashing is acceptable only if the skylight is on a slope above 6:12
  3. The flashing should be eliminated in favor of sealant alone
  4. The flashing is correct because the uphill side must shed water over the shingles

Explanation

At a curb, the flashing on the uphill side must go under the shingles so water sheds over it, while the downhill apron goes over the shingles below. The described arrangement is reversed, which directs water behind the shingles and traps it at the curb. Slope does not correct a reversed lap, and sealant alone is never a substitute for proper flashing.