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MA Roofing Contractor practice questions

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Question 1Massachusetts Building Code - Roofing and Reroofing Provisions

Under the Massachusetts building code, a roof covering used on a one- and two-family dwelling must meet which minimum classification for resistance to fire originating outside the building?

  1. Class C
  2. Class D
  3. Class B
  4. Class A Correct answer.

Explanation

The Massachusetts residential code requires roof coverings on one- and two-family dwellings to be at least Class A rated for exposure to fire from outside the building. Class B and C are lower ratings, and Class D is not a recognized roof covering classification in this scheme.

Question 2Massachusetts Building Code - Roofing and Reroofing Provisions

When reroofing an existing roof, what must be done with the existing roof covering before installing a new layer?

  1. It must be removed down to the roof deck
  2. It may remain if it is sound and securely fastened Correct answer.
  3. It may remain if it is painted with a reflective coating
  4. It may be left in place only if a vapor retarder is added

Explanation

The code permits a new roof covering to be applied over an existing covering only where the existing covering is sound, securely fastened, and free of damage that would affect the new installation. A vapor retarder or reflective coating does not substitute for that condition. Removal to the deck is required only in specified circumstances.

Question 3Massachusetts Building Code - Roofing and Reroofing Provisions

A roofing contractor is installing asphalt shingles on a roof with a slope of 3:12. Which application method does the code require?

  1. Single-layer application only
  2. Double-layer application with no underlayment
  3. Specialty interlocking application
  4. Attachment per the manufacturer's instructions for low-slope roofs Correct answer.

Explanation

Asphalt shingles installed on slopes below 4:12 must be applied in accordance with the manufacturer's instructions for low-slope application, which typically require a doubled underlayment or special methods. Standard single-layer application is only permitted at 4:12 and steeper. The code does not authorize omitting underlayment.

Question 4Massachusetts Building Code - Roofing and Reroofing Provisions

What is the minimum actual thickness of dry, dressed wood boards corresponding to the code's nominal size requirement for spaced-board roof sheathing?

  1. 1 inch
  2. 1/2 inch
  3. 5/8 inch
  4. 3/4 inch Correct answer.

Explanation

The spaced-lumber rule calls for boards at least 1 inch by 4 inches nominal. For dry, dressed lumber, the standard minimum actual thickness of a nominal 1-inch board is 3/4 inch. Thus 3/4 inch answers the actual-thickness question, while 1 inch is the nominal thickness.

Question 5Massachusetts Building Code - Roofing and Reroofing Provisions

A skylight is installed in a roof over a residential bathroom. What must the skylight glazing provide?

  1. A safety glazing material where required by location Correct answer.
  2. Ordinary annealed glass in all cases
  3. An openable sash for ventilation
  4. A minimum of two layers of glass

Explanation

Glazing in hazardous locations, including certain skylights, must be safety glazing material so that breakage does not create a cutting hazard. Ordinary annealed glass is not acceptable in those locations, and neither double glazing nor an openable sash satisfies the safety glazing requirement.

Question 6Massachusetts Building Code - Roofing and Reroofing Provisions

How must roof flashing be installed at the intersection of a roof and a masonry chimney?

  1. Laid in a reglet or groove cut into the masonry Correct answer.
  2. Sealed with caulk only, with no metal
  3. Attached only to the roof sheathing with nails
  4. Wrapped around the chimney without fastening

Explanation

Flashing at a chimney must be embedded in a reglet or groove cut into the masonry and then sealed, so that water cannot enter behind the flashing. Caulk alone, or flashing that is only nailed to the sheathing, does not provide a watertight joint.

Question 7Massachusetts Building Code - Roofing and Reroofing Provisions

Under the Massachusetts code, which roofs must be provided with ice barrier underlayment?

  1. Roofs where the average January temperature is below a set threshold Correct answer.
  2. Only roofs over unheated spaces
  3. All roofs regardless of climate or slope
  4. Only roofs with a slope greater than 8:12

Explanation

Ice barrier underlayment is required along the eaves of roofs in areas where there is a history of ice forming along the eaves causing a backup of water, commonly tied to cold winter design temperatures. The requirement is not universal and is not limited to steep or unheated roofs.

Question 8Massachusetts Building Code - Roofing and Reroofing Provisions

What is the minimum required width of ice barrier underlayment measured from the eave edge?

  1. 18 inches
  2. 36 inches
  3. 12 inches
  4. 24 inches Correct answer.

Explanation

The code requires the ice barrier to extend from the eave edge to a point at least 24 inches inside the interior wall line of the building. Twelve and eighteen inches are too narrow, and thirty-six inches exceeds the minimum without being required everywhere.

Question 9Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is installing a new roof over an existing roof where the existing covering is sound. What must be done with the existing roof edge flashing?

  1. It may be covered without modification
  2. It must be removed and replaced Correct answer.
  3. It must be drilled for drainage
  4. It must be painted to match the new roof

Explanation

When a new roof covering is added over an existing one, the existing edge flashing and drip edge must be removed and replaced so that the new covering is properly terminated and water sheds clear of the wall. Covering it over can trap water and cause deterioration.

Question 10Massachusetts Building Code - Roofing and Reroofing Provisions

Which of the following is required for a roof covering installed over a roof deck with a slope of 2:12 using a low-slope membrane?

  1. An underlayment of building paper only
  2. A minimum slope of 1/4 unit per foot toward drains Correct answer.
  3. A layer of gravel ballast in all cases
  4. A vapor barrier on top of the membrane

Explanation

Low-slope roofs must be designed to drain, and the code requires a minimum slope toward drains or scuppers so that water does not pond. A vapor barrier on top of the membrane, gravel ballast, or paper alone does not satisfy the drainage requirement.

Question 11Massachusetts Building Code - Roofing and Reroofing Provisions

What is the purpose of a cricket installed on the upslope side of a chimney?

  1. To provide ventilation to the attic
  2. To divert water around the chimney Correct answer.
  3. To support the chimney
  4. To anchor the flashing

Explanation

A cricket is a small sloped roof built on the upslope side of a chimney wider than a specified width to divert water around the chimney and prevent it from pooling against the masonry. It does not support the chimney or provide attic ventilation.

Question 12Massachusetts Building Code - Roofing and Reroofing Provisions

Under the code, what is the minimum required height of a chimney above the highest point where it passes through the roof?

  1. 1 foot
  2. 3 feet Correct answer.
  3. 4 feet
  4. 2 feet

Explanation

A chimney must extend at least 3 feet above the highest point where it passes through the roof surface. This height helps ensure adequate draft and reduces the chance of downdrafts or fire hazards from nearby roof surfaces.

Question 13Massachusetts Building Code - Roofing and Reroofing Provisions

What is the minimum required thickness for a roof deck used as a walking surface in a commercial occupancy?

  1. 5/8 inch
  2. 1 inch
  3. 1/2 inch
  4. 3/4 inch Correct answer.

Explanation

Where a roof deck is used as a walking surface, the code requires a minimum thickness of 3/4 inch to support foot traffic and equipment loads. Thinner panels such as 1/2 inch and 5/8 inch may be permitted for non-walking roof sheathing under specific span conditions.

Question 14Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is replacing a roof on a building in a historic district. Which statement best reflects the code's approach to reroofing in such a district?

  1. Reroofing must comply with local historic district requirements in addition to the building code Correct answer.
  2. The code prohibits any reroofing in historic districts
  3. Only metal roofing is permitted in historic districts
  4. Historic buildings are exempt from all roof covering requirements

Explanation

Local historic district ordinances may impose additional requirements on roofing materials and appearance, and the building code does not override them. Historic buildings are not exempt from structural or fire safety provisions, and no single material is mandated by the code for historic districts.

Question 15Massachusetts Building Code - Roofing and Reroofing Provisions

What must be provided at the intersection of a roof and a sidewall where the roof slope is low?

  1. Step flashing only
  2. A single piece of caulk
  3. A cricket only
  4. Apron flashing with a counterflashing Correct answer.

Explanation

At a sidewall intersection, apron flashing must be installed and covered by counterflashing set into the wall so that water cannot enter behind the flashing. Step flashing alone is used where the roof meets a sidewall along the slope, and caulk is never a substitute for flashing.

Question 16Massachusetts Building Code - Roofing and Reroofing Provisions

Under the code, what is the minimum required overlap for asphalt shingles installed in valleys?

  1. 12 inches Correct answer.
  2. 24 inches
  3. 6 inches
  4. 18 inches

Explanation

In valleys, asphalt shingles must overlap at least 12 inches, with the valley lining extending beneath the shingles. Shorter overlaps such as 6 inches increase the risk of leakage at the valley, while 18 and 24 inches exceed the minimum.

Question 17Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is installing underlayment beneath asphalt shingles on a roof with a slope of 6:12. What minimum underlayment is required?

  1. Two layers of approved underlayment
  2. One layer of approved underlayment Correct answer.
  3. No underlayment is required
  4. A layer of gravel

Explanation

On roofs with a slope of 4:12 or greater, a single layer of approved underlayment is required beneath asphalt shingles. Two layers are required only for lower slopes, and gravel is a ballast material, not an underlayment.

Question 18Massachusetts Building Code - Roofing and Reroofing Provisions

What is the purpose of a drip edge installed at the eave of a roof?

  1. To direct water away from the fascia and into the gutter Correct answer.
  2. To ventilate the roof deck
  3. To support the gutter
  4. To secure the shingles to the deck

Explanation

Drip edge is installed at the eave to direct water away from the fascia board and into the gutter, preventing rot and water damage. It does not support the gutter, ventilate the deck, or serve as the primary fastener for shingles.

Question 19Massachusetts Building Code - Roofing and Reroofing Provisions

A roof covering is being installed on a building where the roof slope is 1:12. Which of the following is a code-compliant option?

  1. Asphalt shingles applied in a single layer
  2. Wood shingles
  3. Slate shingles
  4. A built-up roof with a minimum slope toward drains Correct answer.

Explanation

At a slope of 1:12, low-slope roof systems such as a built-up roof are appropriate, provided the roof drains toward drains or scuppers. Asphalt shingles, wood shingles, and slate shingles all require steeper minimum slopes and are not permitted at 1:12.

Question 20Massachusetts Building Code - Roofing and Reroofing Provisions

What is the minimum required thickness for a roof covering of built-up roofing membrane?

  1. Two plies
  2. Five plies
  3. Three plies Correct answer.
  4. Four plies

Explanation

A built-up roof membrane must consist of at least three plies of approved materials to provide adequate waterproofing and durability. Two plies are insufficient, while four and five plies exceed the minimum without being required.

Question 21Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is installing a metal roof on a building. What must be provided where the metal roof panels meet a wall?

  1. A gap of at least 1 inch
  2. An open vent
  3. A layer of caulk only
  4. Flashing that prevents water entry Correct answer.

Explanation

Where metal roof panels meet a wall, flashing must be installed to prevent water from entering the building at the intersection. A gap, caulk alone, or an open vent would allow water penetration and is not code-compliant.

Question 22Massachusetts Building Code - Roofing and Reroofing Provisions

Under the Massachusetts code, which roof covering material is prohibited for use on a roof over a dwelling?

  1. Wood shakes without a fire-retardant treatment Correct answer.
  2. Clay tile
  3. Asphalt shingles
  4. Metal panels

Explanation

Wood shakes used as a roof covering must be treated with an approved fire-retardant process to meet the required fire classification. Untreated wood shakes do not satisfy the Class A requirement for dwellings, while asphalt shingles, clay tile, and metal panels can meet it.

Question 23Massachusetts Building Code - Roofing and Reroofing Provisions

What is the minimum required size of a roof drain leader for a roof area of 1,000 square feet?

  1. 4 inches
  2. 2 inches
  3. 6 inches
  4. 3 inches Correct answer.

Explanation

Roof drain sizing is based on the roof area and rainfall rate, and for a typical residential or small commercial area of 1,000 square feet a 3-inch leader is the minimum under the plumbing provisions referenced by the code. Two inches is too small, and 4 and 6 inches exceed the minimum.

Question 24Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is installing a new roof over an existing roof. Which condition would require complete removal of the existing covering?

  1. The existing covering is deteriorated or damaged Correct answer.
  2. The existing covering is a different color
  3. The existing covering is more than 10 years old
  4. The existing covering is sound and securely fastened

Explanation

A new roof covering may be applied over an existing one only where the existing covering is sound and securely fastened. If the existing covering is deteriorated or damaged, it must be removed before the new covering is installed, regardless of color or age alone.

Question 25Massachusetts Building Code - Roofing and Reroofing Provisions

What is the purpose of a roof ventilation requirement in the code?

  1. To reduce moisture accumulation and temperature extremes in the attic space Correct answer.
  2. To support the roof deck
  3. To provide a walking surface
  4. To increase the roof slope

Explanation

Roof ventilation is required to reduce moisture accumulation and temperature extremes in attic and roof spaces, which helps prevent condensation, rot, and premature deterioration of the roof covering. It does not change the slope, support the deck, or provide a walking surface.

Question 26Massachusetts Building Code - Roofing and Reroofing Provisions

A roofing contractor is installing asphalt shingles on a roof with a slope of 3:12. Under the Massachusetts building code, which underlayment arrangement satisfies the minimum requirement?

  1. Two layers of No. 15 felt lapped and cemented over the entire deck Correct answer.
  2. One layer of No. 15 asphalt-saturated felt applied over the entire deck
  3. No underlayment, provided the shingles are self-sealing
  4. A single layer of No. 30 asphalt-saturated felt applied only at the eaves

Explanation

For roof slopes from 2:12 up to but not including 4:12, the code requires a double layer of underlayment applied shingle-fashion and cemented together over the entire roof deck. A single layer is permitted only on steeper slopes where the covering itself sheds water reliably. The double layer provides a secondary weather barrier where water can back up under the shingles.

Question 27Massachusetts Building Code - Roofing and Reroofing Provisions

During a reroof, a contractor finds that the existing asphalt shingle roof has two layers already installed. What does the code require before a new roof covering may be applied?

  1. Only the top existing layer must be removed, leaving one layer in place
  2. The existing layers may remain if a slip sheet is installed between them
  3. The new covering may be applied directly over both existing layers if they are flat
  4. All existing layers must be removed down to the deck before the new covering is installed Correct answer.

Explanation

The code limits roof coverings to a maximum of two layers over any roof deck. When two layers already exist, the entire existing covering must be removed before a new covering is applied. This prevents excessive dead load and ensures proper fastening into the deck.

Question 28Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is fastening asphalt shingles in a high-wind zone near the Massachusetts coast. Which fastening practice does the code require for the shingles?

  1. Fasteners driven at an angle through the exposed butt edge of the shingle
  2. Fasteners placed above the exposure line with the heads left exposed
  3. Fasteners driven so the heads are driven through the shingle and left below the surface
  4. Fasteners driven through the nailing strip so the heads are flush with the shingle surface Correct answer.

Explanation

Shingle fasteners must be driven through the nailing strip and set flush with the surface of the shingle, not cut into it. Fasteners must penetrate the deck as required by the code and be placed per the manufacturer's wind-resistance instructions. Proper flush driving prevents tearing of the shingle and pull-through under wind uplift.

Question 29Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is installing a roof covering on a low-slope roof and is checking the requirement for a valley. Which statement describes the correct treatment of an open valley between asphalt shingle roof planes?

  1. Valley flashing must extend at least 12 inches from the centerline on each side, with shingles set back from the centerline Correct answer.
  2. Valley flashing may be omitted if the shingles are woven across the valley
  3. Valley flashing must extend only 4 inches from the centerline on each side
  4. Valley flashing must extend at least 6 inches from the centerline on each side, with shingles set back from the centerline

Explanation

For open valleys, the code requires metal flashing at least 12 inches wide on each side of the valley centerline, with the shingles stopped short of the centerline. This keeps the metal exposed to carry water and prevents shingle edges from crossing the flow line. Woven valleys use a different detail and do not rely on a wide open metal pan.

Question 30Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is installing a roof over a conditioned attic where insulation will be placed at the roof line rather than on the ceiling. What does the code require regarding ventilation in this assembly?

  1. The roof assembly must be ventilated with at least 1 square foot of net free vent area per 150 square feet of ceiling area
  2. Ventilation may be omitted where an approved air-impermeable insulation is installed directly to the underside of the roof deck Correct answer.
  3. The roof assembly must be ventilated with at least 1 square foot per 300 square feet regardless of construction
  4. Ventilation may be omitted only if the attic is sprinklered

Explanation

Where an unvented roof assembly is constructed, the code permits omitting ventilation when an approved air-impermeable insulation is applied directly to the underside of the roof deck. This controls condensation on the cold deck surface. Otherwise the roof must be ventilated in accordance with the vent-area ratios.

Question 31Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is installing a roof drain system on a flat roof in Massachusetts. Which statement correctly describes the code requirement for secondary drainage?

  1. Secondary drainage is required only on roofs larger than 10,000 square feet
  2. Secondary drainage must be provided to prevent ponding in the event the primary drains become blocked Correct answer.
  3. Secondary drainage may be omitted if the primary drain is oversized by 50 percent
  4. Secondary drainage is required only when parapet walls exceed 12 inches in height

Explanation

Roofs with primary drainage must also have a secondary drainage system, such as scuppers or a second set of drains set higher than the primary, to handle water if the primary system clogs. This limits ponding load and prevents structural overstress. The requirement is not tied to roof size or parapet height.

Question 32Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is installing roof sheathing on a new dwelling and must select the panel thickness for a given rafter spacing. What governs the minimum thickness of wood structural panel sheathing for the roof?

  1. The number of shingle courses to be applied over it
  2. The pitch of the roof only
  3. The panel span rating for the support spacing, as set out in the code's sheathing table Correct answer.
  4. The color of the panel edge seal

Explanation

Roof sheathing thickness is determined by the panel span rating matched to the rafter or truss spacing, using the code's sheathing table. Thicker panels are required as support spacing increases. The covering type and roof pitch do not set the structural panel thickness.

Question 33Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is installing a skylight in a sloped roof. What does the code require at the curb of the skylight where it meets the roof covering?

  1. The skylight must be set directly on the roof covering without a curb
  2. The skylight must be sealed with caulk only, with no flashing
  3. The curb must be at least 12 inches above the roof surface with no flashing
  4. The curb must be at least 4 inches above the roof surface with flashing integrated into the covering Correct answer.

Explanation

Skylights and similar roof openings must be mounted on a curb raised above the roof surface, and the flashing must be integrated with the roof covering so water is carried over the curb. The code requires the curb height and flashing detail to shed water at the opening. Setting the unit directly on the covering or relying on sealant alone does not provide the required weathertightness.

Question 34Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is installing a built-up roof membrane on a low-slope roof. Which statement correctly reflects the code requirement for the number of plies?

  1. Built-up roofing must consist of at least five plies of roofing felt
  2. Built-up roofing may consist of one ply if a cap sheet is used
  3. Built-up roofing must consist of at least three plies of roofing felt Correct answer.
  4. A single-ply membrane is always required in place of built-up roofing

Explanation

The code requires built-up roofing to have at least three plies of approved roofing felt, unless the manufacturer's approved instructions specify otherwise. The plies are bonded with bitumen and finished with a surfacing. Fewer plies do not provide the required redundancy for a low-slope membrane.

Question 35Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is installing a roof on a building where the roof slope is 1:12 and the covering will be a low-slope membrane. Which statement best describes how the code treats roof slope for selecting the covering?

  1. Only asphalt shingles may be used at 1:12
  2. The covering must be a minimum of two layers of shingles
  3. Any covering may be used at 1:12 because slope does not affect covering selection
  4. The covering must be listed for use at that slope, and the manufacturer's instructions govern the minimum slope Correct answer.

Explanation

Roof coverings must be installed only on slopes for which they are listed and in accordance with the manufacturer's instructions. At a 1:12 slope, steep-slope products such as standard shingles are generally not permitted, and a low-slope membrane listed for that slope is used. The code ties covering selection to the listed minimum slope.

Question 36Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is installing a roof covering adjacent to a wall and must provide base flashing. What is the minimum height that base flashing must extend above the roof surface where the roof meets the wall?

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

Explanation

Base flashing at a wall must extend at least 4 inches above the roof surface, with the counterflashing overlapping it. This height keeps water from backing over the flashing during wind-driven rain or snow melt. Greater heights may be required by the specific detail or manufacturer, but 4 inches is the code minimum.

Question 37Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is installing a roof covering on a building and must determine the required number of fasteners for asphalt shingles in the field of the roof. Which statement reflects the code requirement?

  1. At least one fastener per shingle regardless of width
  2. Fasteners are required only at the rake edges
  3. At least four fasteners per shingle or per tab, in accordance with the manufacturer's instructions Correct answer.
  4. At least eight fasteners per shingle in all cases

Explanation

The code requires asphalt shingles to be fastened with at least four fasteners per shingle, or per tab for strip shingles, and in accordance with the manufacturer's instructions. Higher wind zones may require additional fasteners. The minimum is a baseline that the manufacturer's listing can increase.

Question 38Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is installing a roof over an existing roof covering and plans to use new underlayment. What does the code require regarding the existing covering before the new underlayment and covering are applied?

  1. The existing covering must be repaired so it is sound and flat, and any deteriorated areas replaced Correct answer.
  2. The existing covering must be left undisturbed to preserve the deck
  3. The existing covering must be removed to the deck in all cases
  4. The existing covering must be coated with a reflective surfacing

Explanation

When a new covering is applied over an existing one, the existing covering must be sound, flat, and free of deteriorated areas, and any defective portions must be repaired or replaced before the new work. This ensures the new covering lies flat and fastens properly. Complete removal is required only where the layer limit or condition demands it.

Question 39Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is installing a roof on a building and must provide flashing at a roof-to-wall intersection where the wall is masonry. Which detail is required for the counterflashing?

  1. Counterflashing must be installed only on the roof side of the wall
  2. Counterflashing may be omitted if the base flashing is 12 inches high
  3. Counterflashing must be caulked to the wall surface with no overlap
  4. Counterflashing must be embedded in the masonry or attached to the wall and overlap the base flashing Correct answer.

Explanation

At a masonry wall, counterflashing must be secured to the wall, typically by embedding in a reglet or attaching with a fastened receiver, and must overlap the base flashing. The overlap directs water onto the base flashing rather than behind it. Caulk alone or omission of counterflashing does not provide the required lapped detail.

Question 40Massachusetts Building Code - Roofing and Reroofing Provisions

A contractor is installing a roof covering on a roof with a slope of 8:12 and plans to use underlayment beneath the shingles. Which statement correctly describes the underlayment requirement at this slope?

  1. Two layers of underlayment are required over the entire deck
  2. No underlayment is required at slopes above 6:12
  3. A single layer of approved underlayment is required over the roof deck Correct answer.
  4. Underlayment is required only at the eaves and valleys

Explanation

For roof slopes of 4:12 and steeper, the code permits a single layer of approved underlayment applied over the roof deck beneath the shingles. The double-layer requirement applies to slopes from 2:12 up to 4:12. Underlayment is still required at 8:12; it is not eliminated by steepness.

Question 41Roofing Materials, Systems, and Installation Methods

In Massachusetts, what is the minimum slope for asphalt shingle roofing before a low-slope system must be used?

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

Explanation

Asphalt shingles are limited to roofs of 2:12 slope or steeper under the manufacturer instructions and the state building code; below that, a low-slope membrane must be used. Roofs between 2:12 and 4:12 also require a doubled underlayment and special fastening.

Question 42Roofing Materials, Systems, and Installation Methods

A roof has a slope of 6:12. What is the approximate slope expressed in degrees?

  1. 9.5 degrees
  2. 14.0 degrees
  3. 45.0 degrees
  4. 26.6 degrees Correct answer.

Explanation

A 6:12 pitch rises 6 units over 12 units of run, so the tangent of the angle is 0.5 and the arctangent is about 26.6 degrees. This conversion matters when selecting ice barrier and underlayment products specified by degree rather than pitch.

Question 43Roofing Materials, Systems, and Installation Methods

Which underlayment is required along eaves in Massachusetts to protect against ice dams?

  1. Red rosin building paper
  2. Self-adhering ice barrier membrane Correct answer.
  3. Synthetic spunbonded underlayment
  4. 15-pound asphalt-saturated felt

Explanation

The code requires a self-adhering ice barrier membrane along eaves extending from the eave edge to a point at least 24 inches inside the exterior wall line. The membrane seals around fasteners and resists water backing up behind ice dams.

Question 44Roofing Materials, Systems, and Installation Methods

What is the standard exposure of a 3-tab asphalt shingle that is 12 inches by 36 inches?

  1. 4 inches
  2. 8 inches
  3. 5 inches Correct answer.
  4. 6 inches

Explanation

A standard three-tab shingle is 12 inches tall with a 5-inch exposure, giving about 80 shingles per square when packaged. Exposure determines the number of courses per square and the required nailing pattern.

Question 45Roofing Materials, Systems, and Installation Methods

Which fastening method is acceptable for attaching asphalt shingles to a roof deck?

  1. Staples driven through the shingle
  2. Roofing cement applied along the shingle edges
  3. Drywall screws driven at an angle
  4. Galvanized roofing nails driven flush with the shingle surface Correct answer.

Explanation

Shingles must be fastened with corrosion-resistant nails driven through the shingle and into the deck, with the nail head flush and not cutting the shingle. Staples are generally not permitted, and adhesives are not a substitute for mechanical fastening.

Question 46Roofing Materials, Systems, and Installation Methods

What is the purpose of a drip edge at the eave of a roof?

  1. To secure the gutter to the roof
  2. To provide a nailing surface for the fascia board
  3. To seal the gap between the roof sheathing panels
  4. To direct water away from the fascia and deck edge Correct answer.

Explanation

Drip edge is a metal flashing that projects water away from the fascia and sheathing at the eave and rake. It also provides a clean edge for the underlayment and shingle overhang.

Question 47Roofing Materials, Systems, and Installation Methods

On a roof with a slope of 4:12, which underlayment installation is required over the entire roof deck?

  1. Two layers of underlayment lapped and fastened Correct answer.
  2. A single layer of underlayment
  3. No underlayment if the shingles are self-sealing
  4. Only ice barrier along the eaves

Explanation

For slopes between 2:12 and 4:12, the code requires a doubled underlayment applied shingle-fashion with overlapping layers. Above 4:12, a single layer is acceptable. The double layer provides extra protection against wind-driven rain.

Question 48Roofing Materials, Systems, and Installation Methods

What does the term 'square' mean in roofing measurement?

  1. 100 square feet of roof area Correct answer.
  2. The area of one shingle bundle
  3. 10 square feet of roof area
  4. 1,000 square feet of roof area

Explanation

A roofing square equals 100 square feet of finished roof surface. Shingle bundles are typically packaged three per square, so estimating material quantity starts with calculating the number of squares.

Question 49Roofing Materials, Systems, and Installation Methods

A gable roof measures 40 feet long with a 6:12 slope and a 20-foot span. What is the approximate roof area in squares, including a 10 percent waste factor?

  1. About 22 squares Correct answer.
  2. About 32 squares
  3. About 18 squares
  4. About 27 squares

Explanation

The slope factor for 6:12 is about 1.118, so the sloped area is 40 feet times 20 feet times 1.118, or about 894 square feet. Adding 10 percent gives about 984 square feet, or roughly 10 squares per side, about 20 total before waste, and about 22 with waste.

Question 50Roofing Materials, Systems, and Installation Methods

When installing step flashing along a sidewall, how should each piece be positioned relative to the shingle course?

  1. Each piece is installed over both the shingle below and the shingle above
  2. Each step flashing piece is installed over the shingle below and under the shingle above Correct answer.
  3. Each piece is installed only at the top of the wall, above the highest course
  4. Each piece is installed under both the shingle below and the shingle above

Explanation

Step flashing is woven with the shingle courses so that each piece laps over the shingle below and is covered by the shingle above. This shingle-lap arrangement sheds water down the wall line without relying on sealant.