Tools, Equipment, Materials, and Fasteners
This domain tests whether you can select the correct tool, fastener and material for a given assembly, and whether you know the limits that make each one fail: nail length, corrosion class, asphalt type, membrane compatibility and equipment setup.
Hand and power tools
Expect questions on roofing nailers, cap nailers, hot-air welders (including speed welders with pressure and temperature settings), seam rollers, moisture meters, power brooms, shingle hatchets, snips, and kettle/hot-mop equipment. Each has a setup the manufacturer controls, and exam items often hinge on whether you know that seam quality depends on heat, speed and pressure together, not heat alone.
Fasteners
Roofing nails are typically minimum 11-gauge with a head of at least 9.5 mm (3/8 in.), and must penetrate the deck at least 19 mm (3/4 in.). Cap nails are used for underlayments, self-drilling screws with sealing washers for metal panels and light-gauge steel, and plates for insulation. Corrosion class matters: hot-dip galvanized or stainless in treated lumber, coastal or high-humidity locations; electro-plated fasteners are not acceptable in pressure-treated wood.
Materials
Know the families: asphalt types by softening point, SBS versus APP modified bitumen (SBS is torch- or hot-mop applied and stays flexible in cold; APP is typically torch applied and more heat resistant), TPO, PVC and EPDM single plies, and the underlayments (asphalt-saturated felt versus synthetic). Store membranes out of direct sun and off the ground, keep solvents away from TPO, and never substitute one chemistry for another.
Worked example
Select a nail for 3-tab shingles over No. 15 felt on 12 mm (15/32 in.) plywood, with 19 mm required penetration into the deck. Stack the thicknesses: shingle about 3 mm plus felt about 0.8 mm plus deck 12 mm plus 19 mm penetration equals about 34.8 mm. A 38 mm (1-1/2 in.) roofing nail satisfies this; a 25 mm nail penetrates only about 9 mm into the deck and will pull through under wind uplift.
Traps that cost marks
Overdriving nails and cutting the shingle surface. Using staples where the code or manufacturer requires nails. Mixing SBS and APP membranes or incompatible adhesives. Selecting an asphalt type by price rather than by softening point and slope. Forgetting fastener count: four per shingle normally, six where high-wind detailing applies.