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Roofing Construction and Estimating NASCLA
Questions With Complete Solutions
The roof is 60 feet by 30 feet measured eave to eave. The height of the gable is 5 feet. The squares of shingle required to roof the residence is (Refer to Diagram 1 on last page) A. 16 B. 17 C. 18 D. 19 ✔✔ D. 19 Step 1. Height/Common Run x 12 = Rise to Run 5/15x12 = 3.9 = 4 to 12 Step 2. Length x Width x Flat Area Factor/100 = Squares 60x30x1.054 /100=18. pg 11 Eave to eave measurement is 40 feet. The gable is 8 feet high. The rise and run is? A. 3 B. 4 C. 5 D. 6 ✔✔ C. 5 Height/Common Runx12 = Rise to Run
8/20x12 = 5 in 12 pg 11 In high wind areas, the drip edge should be nailed on centers _______. A. 8 inch B. 10 inch C. 6 inch D. 4 inch ✔✔ D. 4 inch pg 40 When more than one piece of drip edge is required to cover the eaves, the lap should be how many inches? A. 12 B. 8 C. 6 D. 3 ✔✔ D. 3 pg 40 If a roof leaks, it is most likely to leak ______. A. At the perimeter B. At a flashing point C. Under the membrane D. At a valley ✔✔ D. At a valley
When installing a 6-inch pattern, remove how many inches from the second course? A. 12 B. 8 C. 6 D. 4 ✔✔ C. 6 pg 82 When installing closed-cut valleys, care should be taken to make sure shingle end joints are at least how many inches from the centerline of the valley? A. 12 B. 10 C. 8 D. 6 ✔✔ B. 10 pg 90 Application of shingles in a closed-cut valley requires shingles extend at least how many inches beyond the valley centerline? A. 12 B. 10 C. 8 D. 6 ✔✔ A. 12 pg 91
The minimum tons of mission tile to cover 2,000 square feet of roofing area is _______. A. Less than 10 B. Between 10 and 14 C. Between 14 and 18 D. More than 18 ✔✔ B. Between 10 and 14 pg 198 On roof slopes from 4:12 to 6:12 the tile requires ________. A. Nailing with 2 nails and bulling B. Nailing with one nail only C. Fastening only D. Nailing with one nail in addition to using mortar ✔✔ D. Nailing with one nail in addition to using mortar pg 204 Before applying roofing over prestressed concrete decks, many manufacturers recommend the installation of ________. A. 2,500 psi concrete fill B. 1/2 inch thick protection board C. 3 inches of 2,500 psi concrete D. 2 inches of 2,500 psi concrete ✔✔ D. 2 in of 2,500 psi concrete pg 296
The lack of expansion joints will cause roofing felt to ______. A. Slip B. Split C. Blister D. Bubble ✔✔ B. Split pg 319 Expansion joints may be installed in all of the following except? A. The first third of the roof B. The last third of the roof C. In a valley D. In the middle of the roof ✔✔ C. In a valley pg 321 Oakum applied prior to caulking is called ______. A. Backer rod B. Filler C. Gapping D. Sealing ✔✔ A. Backer rod pg 369 When temperatures do not exceed 125 degrees, the type of asphalt to be used below grade is ________. A. 1
B. 2
C. 3
D. 4 ✔✔ B. 2
pg 373 To prevent chimneys from leaking, the contractor should apply which of the following: A. A generous amount of roofing cement B. A small amount of roofing cement C. A flue collar D. A flue cap ✔✔ D. A flue cap pg 382 A roof with a rake factor of 1.302 has a ______ slope in inches per foot. A. 6 B. 8 C. 10 D. 11 ✔✔ C. 10 pg 15 A roof with a 5:12 slope has a hip factor of _________. A. 1. B. 1. C. 1.
pg 99 When applying roll roofing, on the first course parallel to the eaves, end laps should be a minimum of _____ inches wide. A. 6 B. 4 C. 2 D. 8 ✔✔ A. 6 pg 135 The first thing a professional roofer measures is ______. A. Ridge B. Valley C. Shingle area D. Eaves ✔✔ D. Eaves pg 6 Placing nails in an area that will be covered by roofing materials is called ________. A. Good practice B. Unusual C. Conceited nailing D. Blind nailing ✔✔ D. Blind nailing pg 137
When installing shingles using a 6" pattern, you must start the first course with a _______ shingle. A. Full B. Half C. Quarter D. Third of a ✔✔ A. Full pg 82 When trimming open valley shingles, leave ______ inches on each side of the valley for the water trough. A. 1 B. 3 C. 5 D. 8 ✔✔ B. 3 pg 89 Trimming of a sharp valley corner is known as _______. A. Good to do if the boss is watching B. Dubbing C. Clipping D. Expensive ✔✔ B. Dubbing pg 89 On a new shingle roof, nails should be ______ inches long.
C. 90
D. 130 ✔✔ D. 130
pg 160 Shakes 24" x 3/4" handsplit and resawn with 7-1/2" exposure will cover approximately ______ square feet per square. A. 75 B. 65 C. 85 D. 100 ✔✔ A. 75 pg 175 Application of Spanish clay tile takes between ______ hours per square. A. 1- B. 2- C. 3- D. 4-5 ✔✔ C. 3- pg 229 A roof 76 feet long, 152 feet wide has a ridgeline perpendicular to the 76-foot side. The height of the ridge is 19 inches above the roof edge. The slope of the roof is ________. A. 1/8 in 12 B. I/4 in 12
C. 1/2 in 12 D. 1 in 12 ✔✔ B. 1/4 in 12 Height in feet/Common Run x 12 = Rise 1.583/76x12 = 0. pg 11 Areas of loose membrane should be cut, heated and bonded to the substrate. An additional piece of the same material shall be installed beyond the area to be repaired extending a minimum of how many inches over the cut in all directions? A. 6 B. 7 C. 8 D. 4 ✔✔ A. 6 pg 330 The removal of the corner of a shingle in a valley is called _______. A. Bad practice B. Common practice C. Cropping D. Dubbing ✔✔ D. Dubbing pg 89
Fasteners should be long enough for the shank to penetrate through the roofing materials and at least _____ inch into the deck. A. 7/ B. 1 C. 3/ D. 1/2 ✔✔ C. 3/ pg 106 Corrosion resistant drip edges should extend how many inches back from the edge? A. 1 B. 2 C. 3 D. 4 ✔✔ C. 3 pg 40 Roof planes butting against walls at the end of shingle courses should be protected by metal shingles called _______ flashing. A. Stop B. Step C. 5x D. Bull ✔✔ B. Step pg 99
Drip edge should be fastened with nails a maximum of ______ inches on center. A. 12 B. 10 C. 8 D. 6 ✔✔ B. 10 pg 40 A good roofer should always ______ when estimating a roof? A. Measure the roof B. Sketch the roof C. Secure the ladder D. Photograph the roof ✔✔ B. Sketch the roof pg 6 The alignment of the top edge of the new shingles with the butt edge of the old shingles is known as ______. A. Butt-up B. Butt-down C. Button-up D. Button-down ✔✔ A. Butt-up pg 395 The placing of asphalt shingles over built-up roofing is _______.
C. 5
D. 6 ✔✔ C. 5
pg 101 Prefabricated roof panels have a standard width of _______ inches? A. 18 B. 24 C. 36 D. 42 ✔✔ D. 42 pg 277 The ______ penny nail is usually adequate for handsplit shakes. A. 2 B. 4 C. 6 D. 8 ✔✔ C. 6 pg 167 A suggested valley flashing for metal roofs is _____. A. Aluminum B. Terne C. Stainless steel D. Galvanized iron ✔✔ D. Galvanized iron
pg 261 One square of 18 inch x 3/8-inch straight shakes with 10 inches laid to weather will cover approximately _____ square feet. A. 94 B. 135 C. 110 D. 118 ✔✔ D. 118 pg 175 All metal sheets heavier than 30 gauge are called ______ metal. A. Flat B. Round C. Coil stock D. Sheet ✔✔ D. Sheet pg 255 The best way to apply a glass fiber-reinforced asphalt emulsion roof system is to _______. A. Spray B. Rock C. Roll D. Mop ✔✔ A. Spray pg 305
