I85PREP
⌘ K
MI Roofing Contractor study materials
MI Roofing Contractor study resources

MI Roofing Contractor practice questions

One question at a time. Build your MI Roofing Contractor understanding.

First 50 of 199 questions. Each one lists the choices, the correct answer, and an explanation. The checker at the top of this page saves progress in this browser when it is available.

Continue in the practice tool above to load more questions, 50 at a time.

Question 1Roofing Systems, Materials and Components

Where on a roof is ice dam protection membrane normally required?

  1. Along the ridge
  2. Along the eaves Correct answer.
  3. Around skylights only
  4. At the rake edges only

Explanation

Ice dams form when meltwater refreezes at the cold overhang, so the water-resistant barrier belongs along the eave edge, extending up the roof past the warm wall line. Ridges and rakes do not collect the same refreezing water.

Question 2Roofing Systems, Materials and Components

What is the minimum roof slope at which standard asphalt shingles may be applied without a doubled underlayment?

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

Explanation

Asphalt shingles are permitted down to 2:12, but between 2:12 and 4:12 the underlayment must be doubled. At 4:12 and steeper, a single layer of underlayment is acceptable.

Question 3Roofing Systems, Materials and Components

At the eaves, how is metal drip edge positioned relative to the underlayment?

  1. Butted tight against the underlayment edge
  2. Installed only after the shingles are fastened
  3. Under the underlayment so the underlayment laps over it Correct answer.
  4. Over the underlayment so water drains onto it

Explanation

At the eave, the underlayment must shed water over the top of the drip edge, so the drip edge goes down first and the underlayment overlaps it. At the rake the relationship reverses, with the drip edge placed over the underlayment.

Question 4Roofing Systems, Materials and Components

How far must roofing nails penetrate through the roof sheathing?

  1. Flush with the sheathing surface
  2. 3/4 inch, or through the sheathing thickness if less Correct answer.
  3. 1/2 inch
  4. 1/4 inch

Explanation

Fasteners must penetrate at least 3/4 inch into or through the sheathing, or completely through the sheathing when it is thinner than that. Proper penetration develops the holding power the shingle needs.

Question 5Roofing Systems, Materials and Components

What is the primary function of a ridge vent?

  1. Exhausting warm, moist air from the attic at the roof's peak Correct answer.
  2. Sealing the ridge against snow infiltration
  3. Supporting the roof deck at the ridge
  4. Supplying intake air at the roof's peak

Explanation

Ridge vents act as the exhaust half of a balanced attic ventilation system, letting warm, moist air escape at the highest point. Intake is provided lower on the roof, typically at the soffits.

Question 6Roofing Systems, Materials and Components

In asphalt shingle work, the term 'exposure' means:

  1. The portion of the shingle left uncovered by the course above Correct answer.
  2. The overall length of one shingle
  3. The number of bundles needed per square
  4. The thickness of the shingle mat

Explanation

Exposure is the weather-exposed height of each course, equal to the shingle height minus the headlap. It controls the coverage and the nailing location.

Question 7Roofing Systems, Materials and Components

A roof is classified as low-slope when its slope is:

  1. Less than 6:12
  2. Less than 3:12 Correct answer.
  3. Exactly 4:12
  4. Greater than 4:12

Explanation

Roofs below 3:12 are treated as low-slope and generally require a membrane system such as built-up roofing, modified bitumen, or a single-ply membrane. Steeper roofs are handled with steep-slope products like shingles and tiles.

Question 8Roofing Systems, Materials and Components

A built-up roof membrane is constructed by:

  1. Spraying polyurethane foam only
  2. Interlocking preformed metal panels
  3. Alternating layers of bitumen and reinforcing ply felt Correct answer.
  4. Adhering a single layer of rubber to the deck

Explanation

Built-up roofing is a multi-ply membrane made by mopping bitumen between layers of reinforcing felt and finishing with a surfacing. The ply count determines the membrane's overall durability.

Question 9Roofing Systems, Materials and Components

Ice barrier membrane at the eaves must extend up the roof at least how far inside the exterior wall line?

  1. 24 inches Correct answer.
  2. 12 inches
  3. 6 inches
  4. 36 inches

Explanation

The membrane must run from the eave to a point at least 24 inches inside the interior face of the exterior wall, so refreezing meltwater that backs up is stopped above the warm wall.

Question 10Roofing Systems, Materials and Components

A preformed metal valley liner for an asphalt shingle roof should be at least how wide?

  1. 48 inches
  2. 24 inches Correct answer.
  3. 8 inches
  4. 16 inches

Explanation

Metal valley material is normally at least 24 inches wide and centered in the valley so each side receives roughly 12 inches of coverage under the shingles. This width keeps backup water over metal rather than bare underlayment.

Question 11Roofing Systems, Materials and Components

How are step flashings installed along a vertical sidewall?

  1. One long piece run the full length of the wall
  2. One piece for every three shingle courses
  3. Only at the top and bottom of the wall
  4. One piece per shingle course, lapped by the shingle above and by the piece behind Correct answer.

Explanation

Step flashing is installed in individual pieces, one for each shingle course, with each piece overlapped by the shingle above and by the next flashing piece upslope. This shingle-lapped arrangement sheds water step by step down the wall.

Question 12Roofing Systems, Materials and Components

Counterflashing is used to:

  1. Protect the top edge of base flashing where it enters the wall Correct answer.
  2. Support the gutter at the eave
  3. Cover the ridge of the roof
  4. Vent the attic space

Explanation

Counterflashing is the upper metal that overlaps the top of the base flashing and is embedded in or attached to the wall, sealing the joint so water cannot get behind the base flashing.

Question 13Roofing Systems, Materials and Components

What are the standard lap requirements for asphalt-saturated felt underlayment?

  1. 6 inches on the sides and 6 inches at the ends
  2. 2 inches on the sides and 4 inches at the ends Correct answer.
  3. 4 inches on the sides and 2 inches at the ends
  4. 1 inch on the sides and 1 inch at the ends

Explanation

Felt underlayment is lapped 2 inches at the sides and 4 inches at the ends, with upper layers lapping over lower layers so water always flows over the lap. End laps are larger because water runs down the slope in that direction.

Question 14Roofing Systems, Materials and Components

Under the IRC, attic net free ventilation area is generally required to be 1 square foot for every how many square feet of attic floor area?

  1. 300
  2. 100
  3. 150 Correct answer.
  4. 600

Explanation

The default rule is a 1:150 ratio of net free vent area to attic floor area. A 1:300 ratio is permitted only where the code's exceptions for balanced intake and exhaust and a vapor retarder are met.

Question 15Roofing Systems, Materials and Components

Thermoplastic polyolefin (TPO) membrane seams are typically joined by:

  1. Mechanical crimping
  2. Hot-air welding Correct answer.
  3. Contact adhesive tape only
  4. Solvent cement

Explanation

TPO is a thermoplastic, so seams are fused with hot air (or another heat source) to create a welded, monolithic bond. Solvent cements do not dissolve TPO into a reliable seam.

Question 16Roofing Systems, Materials and Components

Which modified bitumen membrane type is most commonly torch-applied?

  1. EPDM
  2. SBS
  3. PVC
  4. APP Correct answer.

Explanation

APP (atactic polypropylene) modified bitumen has a high softening point and is typically applied by heating the underside with a torch to melt the bitumen. SBS is more often set in hot asphalt or installed with self-adhering products.

Question 17Roofing Systems, Materials and Components

What is the minimum roof slope for a standing-seam metal roof?

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

Explanation

Standing-seam panels have raised, mechanically seamed ribs that resist water migration, so they may be installed on slopes as low as 1/4:12. Lapped metal panels without seams require steeper slopes.

Question 18Roofing Systems, Materials and Components

Which fastener is preferred for cedar shingles to avoid staining from wood extractives?

  1. Electro-galvanized nails
  2. Stainless steel nails Correct answer.
  3. Copper-plated staples
  4. Aluminum nails

Explanation

Cedar contains water-soluble extractives that corrode ordinary galvanized fasteners and cause rust staining down the roof. Stainless steel nails resist this attack and are the preferred choice for cedar.

Question 19Roofing Systems, Materials and Components

A standard three-tab shingle laid with a 5-inch exposure has a headlap of:

  1. 3 inches
  2. 2 inches Correct answer.
  3. 1 inch
  4. 5 inches

Explanation

Headlap equals the shingle height minus twice the exposure. For a 12-inch shingle with 5-inch exposure, the headlap is 12 minus 10, or 2 inches.

Question 20Roofing Systems, Materials and Components

How many bundles of standard three-tab asphalt shingles are required to cover one square (100 square feet)?

  1. 4
  2. 3 Correct answer.
  3. 2
  4. 1

Explanation

Standard three-tab shingles are packaged so that three bundles cover one square. Heavier architectural shingles are often packaged four or more bundles per square.

Question 21Roofing Systems, Materials and Components

A 4:12 roof slope expressed as a percentage is approximately:

  1. 25 percent
  2. 12 percent
  3. 48 percent
  4. 33 percent Correct answer.

Explanation

Slope percentage equals rise divided by run times 100. A 4:12 slope is 4 divided by 12, or 0.333, which is about 33 percent.

Question 22Roofing Systems, Materials and Components

A cricket is required on the upslope side of a chimney when the chimney's width parallel to the ridge exceeds:

  1. 24 inches
  2. 30 inches Correct answer.
  3. 48 inches
  4. 12 inches

Explanation

Chimneys wider than 30 inches measured parallel to the ridge create a broad area where water and snow collect, so a cricket is required to divert flow around the chimney. Narrower chimneys can be flashed without one.

Question 23Roofing Systems, Materials and Components

Asphalt shingles installed on a roof slope between 2:12 and 4:12 require:

  1. No underlayment at all
  2. A layer of building paper only
  3. A single layer of No. 15 felt
  4. Two layers of underlayment Correct answer.

Explanation

In the 2:12 to 4:12 range, shingles are allowed only with a doubled underlayment because the low slope drains slowly and is more prone to wind-driven and backup water. At 4:12 and steeper, one layer suffices.

Question 24Roofing Systems, Materials and Components

An attic has 1,800 square feet of floor area and must be ventilated at 1/150 with balanced intake and exhaust. What net free area is needed at the exhaust (ridge)?

  1. 18 square feet
  2. 12 square feet
  3. 3 square feet
  4. 6 square feet Correct answer.

Explanation

Total net free area is 1,800 divided by 150, or 12 square feet. Balanced ventilation splits that evenly, so the exhaust half is 6 square feet and the intake half is 6 square feet.

Question 25Roofing Systems, Materials and Components

What is the maximum number of layers of asphalt shingles permitted on a roof?

  1. Two Correct answer.
  2. Three
  3. One
  4. Four

Explanation

Only two layers total are permitted, meaning a new layer may be applied over one existing layer. Adding a third layer exceeds the limit and requires complete tear-off.

Question 26Roofing Systems, Materials and Components

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

  1. Supply intake air to the attic space at the eave
  2. Direct runoff clear of the fascia and deck edge Correct answer.
  3. Provide a finished trim line along the rake edge
  4. Seal the gap between the lowest shingle course and the gutter

Explanation

A drip edge is edge metal at the eave that sheds runoff past the fascia and keeps water from wicking back beneath the shingles into the deck edge. It is a water-shedding flashing, not a vent, trim, or gutter seal.

Question 27Roofing Systems, Materials and Components

Steep-slope roof decks in modern residential construction are most commonly sheathed with:

  1. Nominal one-inch boards laid tight together
  2. Tongue-and-groove 2 x 6 plank decking
  3. Gypsum sheathing panels
  4. Plywood or OSB rated for roof use Correct answer.

Explanation

Roof decks are typically sheathed with plywood or OSB panels manufactured and marked for roof use, with thickness selected from the rafter spacing. Board sheathing belongs to older construction, and gypsum products carry no structural roof capacity.

Question 28Roofing Systems, Materials and Components

A ridge vent ventilates an attic by:

  1. Exhausting warm attic air through a baffled ridge opening Correct answer.
  2. Circulating attic air only when a powered fan is running
  3. Sealing the ridge against rain entry while blocking airflow
  4. Pulling cool outside air in at the ridge and pushing it down the slope

Explanation

A ridge vent is a continuous exhaust opening along the ridge, covered by a baffled or filtered profile that keeps weather out while letting warm, moist attic air escape. It depends on intake air at the eaves and works passively.

Question 29Roofing Systems, Materials and Components

Soffit vents are installed primarily to:

  1. Keep insects from entering the gutter channel
  2. Exhaust warm, moist air out of the attic
  3. Admit intake air into the attic at the eaves Correct answer.
  4. Support the fascia and gutter at the eave

Explanation

Soffit vents form the intake half of the attic ventilation system, admitting outside air at the eaves so it can sweep along the underside of the roof and leave through exhaust vents. Balanced intake and exhaust keep the assembly working.

Question 30Roofing Systems, Materials and Components

Which roofing accessory is a synthetic sheet made from polypropylene or polyethylene rather than an asphalt-saturated mat?

  1. Synthetic polyolefin underlayment Correct answer.
  2. SBS-modified bitumen cap sheet
  3. No. 15 asphalt-saturated organic felt
  4. Grade D building paper

Explanation

Synthetic underlayments are woven or spunbond polyolefin sheets that resist tearing, weigh less than felt, and do not depend on an asphalt-saturated organic mat. Felt and building paper are organic or paper-based products.

Question 31Roofing Systems, Materials and Components

On an asphalt shingle roof, a closed-cut valley is formed so that:

  1. Both slopes stop short of the valley and a cap sheet is applied over the gap
  2. One slope's shingles cross the valley and are cut parallel to the other slope's line Correct answer.
  3. A preformed metal pan is installed under both slopes for the full length of the valley
  4. Courses from both slopes are woven alternately across the valley centerline

Explanation

In a closed-cut valley the shingles of one slope run through the valley and are trimmed in a straight line parallel to the centerline of the opposing slope, which lies uncut beneath. Weaving and metal pans belong to other valley methods.

Question 32Roofing Systems, Materials and Components

EPDM single-ply membrane is best described as:

  1. A cementitious coating applied in successive layers
  2. A thermoplastic sheet that is heat-welded at the seams
  3. A plastomeric modified bitumen sheet
  4. A thermoset sheet joined with splice adhesive or tape Correct answer.

Explanation

EPDM is a cured thermoset rubber that cannot be re-melted, so seams are made with splice adhesive or pressure-sensitive tape. Thermoplastic membranes such as TPO and PVC are joined by heat welding instead.

Question 33Roofing Systems, Materials and Components

Panel edge clips (H-clips) placed between roof sheathing panels serve to:

  1. Block wind-driven rain at the panel joints
  2. Fasten the panels to the rafters
  3. Hold the panels apart for expansion
  4. Provide edge support between rafters Correct answer.

Explanation

H-clips bridge the joint between adjacent panel edges that fall between rafters, adding edge support and limiting deflection and differential movement. They do not attach panels to framing or act as weather protection.

Question 34Roofing Systems, Materials and Components

The preferred fastener material for natural slate roofing is:

  1. Copper Correct answer.
  2. Aluminum roofing nails
  3. Electro-galvanized roofing nails
  4. Coated drywall screws

Explanation

A slate roof is expected to last a century or more, so the fasteners must last as long; copper and stainless steel are the accepted materials. Aluminum corrodes in contact with slate and mortar, thin galvanized coatings have a short life, and drywall screws are not roofing fasteners.

Question 35Roofing Systems, Materials and Components

Wood roof shakes differ from wood shingles in that shakes are:

  1. Always pressure-treated with a fire-retardant chemical
  2. Split along the grain, giving a textured surface Correct answer.
  3. Made only from southern yellow pine
  4. Sawn on both faces to a uniform thickness

Explanation

Shakes are split from the block along the grain, which produces a rough, textured face, while shingles are sawn and taper smoothly. The split-versus-sawn distinction is what separates the two products.

Question 36Roofing Systems, Materials and Components

Oil canning in a metal roof panel appears as:

  1. Standing water along the panel seams
  2. Fasteners backing out of the panel
  3. Rust streaks running down from the fasteners
  4. Visible waviness in the flat of the panel Correct answer.

Explanation

Oil canning is a visible waviness or read in the flat portion of a metal panel, produced by stresses from forming, fastening, or thermal movement. It is a cosmetic condition and does not by itself indicate a leak.

Question 37Roofing Systems, Materials and Components

SBS-modified bitumen membranes are characterized as:

  1. Elastomeric sheets that stay flexible in cold Correct answer.
  2. Single-ply thermoset rubber sheets
  3. Cement-based coatings reinforced with fiber mesh
  4. Thermoplastic sheets welded with hot air

Explanation

SBS modification gives bitumen rubber-like elasticity, so the sheet stays flexible at low temperatures and can accommodate some movement. APP is the plastomeric counterpart with different behavior.

Question 38Roofing Systems, Materials and Components

A roof rises 6 inches for every 12 inches of horizontal run. What is the approximate angle of the roof from horizontal?

  1. 33.7 degrees
  2. 22.6 degrees
  3. 30.0 degrees
  4. 26.6 degrees Correct answer.

Explanation

The angle is the arctangent of rise divided by run, so arctangent of 6/12 equals arctangent of 0.5, which is about 26.6 degrees. The other choices correspond to steeper or flatter slopes.

Question 39Roofing Systems, Materials and Components

Copper flashing should be kept out of direct contact with which of the following, to avoid galvanic corrosion?

  1. Lead sheet
  2. Terne-coated copper
  3. Stainless steel
  4. Aluminum Correct answer.

Explanation

Dissimilar metals joined in the presence of moisture form a galvanic cell, and copper is cathodic to aluminum, so the aluminum is consumed. Lead, stainless steel, and terne-coated copper are traditionally compatible with copper flashing.

Question 40Roofing Systems, Materials and Components

Blistering of an asphalt built-up roof membrane is most often caused by:

  1. Thermal movement of the roof deck
  2. Ultraviolet breakdown of the surfacing
  3. Moisture trapped between the plies Correct answer.
  4. An excessively thick surface coating

Explanation

Blistering occurs when moisture, from a damp deck, wet felts during construction, or vapor drive, is sealed within the membrane and expands when solar heat raises the temperature. It is fundamentally a trapped-moisture problem.

Question 41Roof Installation, Repair and Replacement Practices

On a shingled roof in Michigan, where must an ice barrier membrane be installed?

  1. Only in the valleys and along the rake edges, where water concentrates
  2. Over the entire roof deck from the eave to the ridge in every installation
  3. Only along the ridge and hip lines, where ice first forms
  4. From the eave to at least 24 inches inside the interior wall line Correct answer.

Explanation

An ice barrier is required along the eaves, extending from the eave edge to a point at least 24 inches measured horizontally inside the exterior wall line of the heated building. That is the zone where meltwater refreezes and backs up under the shingles, so covering the whole deck is not required and covering only valleys or ridges does not address the problem.

Question 42Roof Installation, Repair and Replacement Practices

What is the minimum roof slope for installing asphalt shingles?

  1. 1:12 with a single layer of underlayment
  2. Any slope if a peel-and-stick membrane is used
  3. 2:12 with a doubled underlayment Correct answer.
  4. 4:12 with no underlayment required

Explanation

Asphalt shingles require a minimum slope of 2:12. Between 2:12 and 4:12 a double layer of underlayment is required, and below 2:12 a low-slope membrane roof system must be used instead of shingles.

Question 43Roof Installation, Repair and Replacement Practices

Where should fasteners be driven when installing a standard three-tab asphalt shingle?

  1. Anywhere in the exposed portion that will show after installation
  2. About 2 inches above the butt edge of the shingle
  3. In the manufacturer's nail zone just above the exposure line Correct answer.
  4. Through the self-sealing adhesive strip at mid-height of the tab

Explanation

Fasteners belong in the nail zone, which is typically just above the exposure line so the next course covers the heads and the shingle is held through the common bond area. Nails driven through the adhesive strip or set too high prevent proper sealing and allow tabs to lift or tear.

Question 44Roof Installation, Repair and Replacement Practices

What is the minimum side lap when applying No. 15 asphalt felt underlayment horizontally?

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

Explanation

Asphalt felt is lapped with the upper sheet over the lower sheet, using a 2-inch side lap and a 4-inch end lap so water always drains onto the sheet below.

Question 45Roof Installation, Repair and Replacement Practices

How is drip edge installed along the eave of a shingle roof?

  1. Under the underlayment, over the fascia board Correct answer.
  2. Over the underlayment and over the shingle tabs at the eave
  3. Only along the rake edges, never at the eaves
  4. Nailed to the deck only, with the shingles laid over it

Explanation

At eaves the underlayment laps over the drip edge so water on the felt drains onto the metal and off the roof edge. At rakes the relationship reverses, with the drip edge installed over the underlayment.

Question 46Roof Installation, Repair and Replacement Practices

Which practice is correct when installing step flashing along a vertical sidewall on a shingled roof?

  1. Installed beneath the underlayment and left unfastened
  2. Run as one continuous L-shaped piece for the full wall length
  3. Lapped by the course above and fastened only at the top edge Correct answer.
  4. Fastened through the face every 8 inches with roofing nails

Explanation

Step flashing is installed in pieces that interweave with the shingle courses: each piece is covered by the shingle course above, and the only fasteners are placed at the top of the piece into the wall sheathing. This keeps shingle fasteners from piercing the metal, which would create a leak path.

Question 47Roof Installation, Repair and Replacement Practices

A cricket is required on the uphill side of a chimney when the chimney is wider than:

  1. 30 inches Correct answer.
  2. 12 inches
  3. 18 inches
  4. 48 inches

Explanation

A cricket, or saddle, is required where a chimney or similar projection is more than 30 inches wide, so water and debris are diverted around the obstruction instead of collecting against it.

Question 48Roof Installation, Repair and Replacement Practices

What minimum ratio of net free ventilating area to insulated ceiling area applies to a sloped roof under the general rule?

  1. 1/300
  2. 1/100
  3. 1/500
  4. 1/150 Correct answer.

Explanation

The general rule requires at least 1 square foot of net free vent area for each 150 square feet of insulated ceiling area. The 1/300 ratio is permitted only where a vapor retarder is installed and intake and exhaust vent areas are balanced.

Question 49Roof Installation, Repair and Replacement Practices

How should net free vent area be divided between soffit and ridge vents on a balanced attic ventilation system?

  1. Half at the soffit and half at the ridge Correct answer.
  2. Three-quarters at the ridge and one-quarter at the soffit
  3. One-quarter at the soffit and three-quarters at the ridge
  4. All of it at the ridge, with no intake vents

Explanation

A balanced system provides roughly equal intake area low at the soffits and exhaust area high at the ridge. Without adequate intake, ridge vents cannot move air and may pull conditioned air out of the living space.

Question 50Roof Installation, Repair and Replacement Practices

How should wood structural roof sheathing panels be oriented during installation?

  1. Fastened only at the perimeter and at the ridge
  2. Long dimension parallel to the rafters to save cutting
  3. Long dimension across the rafters, ends over framing Correct answer.
  4. Ends butted anywhere between rafters for faster layout

Explanation

Panels are laid with the long dimension perpendicular to the rafters and all panel ends bearing on framing. This orients the panel's strength across the span and provides a solid nailing surface at every edge.