Certified Roofing Contractor/Trade Knowledge

Steep-Slope Systems

30% of this exam

Shingle, tile, and metal systems: where each is allowed by slope, how each is attached, and the flashing details that keep water out at every edge, wall, and penetration. The exam tests the details — nailing zones, starter strips, valley types, and the two-part flashing logic — more than the field shingling itself.

Core concepts

Slope decides the system

Asphalt shingles want 4:12 and steeper but are permitted down to 2:12 with enhanced underlayment per code and manufacturer. Below 2:12 is membrane territory — no shingles. A roofing square is 100 square feet, the unit everything is sold and estimated in.

Fastening is where shingle roofs fail

Nails go in the manufacturer's designated nailing zone — generally just below the sealant strip — so each nail catches the top of the course below. High nailing misses that course and is a leading cause of blow-offs. Tile attaches mechanically (screws/nails) or with foam adhesive, always per the product approval.

Flashing is a layered, lapped system

Step flashing weaves one piece into each course at sidewalls; a kick-out at the bottom throws water into the gutter instead of behind the siding. Counterflashing attaches to the wall and laps over the base flashing. Crickets divert water around the high side of chimneys wider than 30 inches.

Edges and accessories finish the system

Drip edge directs runoff clear of the fascia at eaves and rakes; starter strips seal and back up the first course's joints; hips and ridges get lapped cap shingles installed last. Ridge vents only work with roughly balanced soffit intake.

Key facts to know cold

Shingle slope limits4:12 standard; 2:12 minimum with enhanced underlayment; below 2:12 use a membrane

Nail placementManufacturer's nailing zone, below the sealant strip — high nailing causes blow-offs

Chimney cricket triggerRequired when the chimney is wider than 30 inches

Tile attachmentMechanical (screws/nails) or foam-set adhesive, per product approval

Metal panel typesStanding seam = concealed clips; exposed-fastener = gasketed screws through the face

Underlayment typesFelt and synthetic are nailed; self-adhered bonds to the deck and seals around fasteners

See it drawn out

Fig — Asphalt shingle slope limits

Absolute minimum slope2 in 12
Only with the enhanced underlayment the code and manufacturer require.
Standard minimum slope4 in 12
Where shingles perform best; normal underlayment rules apply.

Where it lives in your books

The real exam is open book. Knowing which book — and which tab — answers this domain is worth as much as memorizing it.

manual

Roofing References

Florida roofing is code-first: product approvals, underlayment, and attachment requirements decide questions that would be judgment calls elsewhere. Tab the FBC roofing chapter before anything else.

7 recommended tabs

Lookup strategy

· System questions (shingles vs tile vs metal) route to the NRCA manual's steep-slope sections — tab each system separately.
· Slope minimums and the 30-inch cricket rule are code lookups; check the FBC roofing chapter rather than answering from memory.

Reading isn't learning — retrieval is.

47 questions in this domain, each with an explanation and source.