MS Roofing Contractor flashcards
MS Roofing Contractor · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Certificate of Responsibility
- Mississippi credential issued by the State Board of Contractors that authorizes a contractor to bid and contract for work above statutory thresholds; the number must appear on bids and contracts.
- Licensed classification scope
- A contractor may only perform work within the classification shown on the license; residential classification does not authorize commercial or public project work.
- Unlicensed contracting consequence
- Bidding or contracting without the required certificate can make the contract unenforceable and exposes the contractor to Board discipline, fines, and loss of payment rights.
- Written change order rule
- Owner-directed changes must be documented in writing and signed before work proceeds; oral changes are a leading cause of payment disputes and licensing complaints.
- Mechanics lien filing
- A contractor or supplier claiming unpaid labor or materials must give the owner statutory notice and file the lien within the deadline measured from last furnishing.
- License renewal deadline
- Certificates carry a fixed term; renewal after expiration incurs penalties and may require reinstatement, so expiration dates belong on the project and company calendar.
- Subcontractor verification duty
- Before subletting, the licensed contractor must confirm the sub's license and insurance; the prime remains responsible to the owner for the sub's work.
- Gross profit formula
- Contract revenue minus direct job costs for labor, material, equipment, and subcontracts. It excludes overhead and is the amount available to cover company fixed costs.
- Markup versus margin
- Markup is a percentage of cost; margin is a percentage of price. Price from margin equals cost divided by one minus the margin rate.
- Break-even revenue
- Total annual fixed overhead divided by the gross margin percentage. It is the sales volume required before the company earns any net profit.
- Labor burden rate
- The percentage added to base wages for payroll taxes, workers' compensation, insurance, and benefits. Bid labor at the burdened rate, not the raw hourly wage.
- Retainage treatment
- A percentage, commonly five to ten, withheld until final acceptance. It is a receivable, not cash, and must be reflected in cash-flow projections.
- Current ratio test
- Current assets divided by current liabilities. A result around 1.5 or higher indicates the company can meet short-term obligations from short-term resources.
- Job cost phase coding
- Assigning each invoice, timesheet, and equipment charge to a work phase so estimated versus actual cost can be compared at project closeout.
- Revenue concentration limit
- A rule of thumb capping any single project at roughly 25 to 30 percent of annual revenue to reduce the risk of one job's failure sinking the company.
- Working capital reserve
- Cash held to cover roughly four to eight weeks of payroll and fixed costs, protecting the company against slow payers and seasonal gaps.
- Shingle nailing placement
- Fasteners go in the manufacturer's nail line, four per shingle for standard three-tab and six for architectural shingles in high-wind zones.
- Minimum shingle slope
- Asphalt shingles require at least a 2:12 slope, with some products requiring 4:12. Below that, membrane or built-up low-slope systems are used.
- Ice-dam protection extent
- Waterproofing membrane at eaves runs from the eave edge to at least 24 inches inside the exterior wall line, and is also used in valleys in many jurisdictions.
- Step flashing installation
- L-shaped flashing installed at sidewalls with each shingle course, woven so each piece laps the one below and is covered by the next shingle.
- Kick-out flashing purpose
- A diverter at a wall-roof termination that pushes water away from siding and wall cladding, preventing rot and staining at the corner.
- Attic ventilation ratio
- Net free vent area of about 1:150 of attic floor area, or 1:300 when a vapor barrier and balanced intake and exhaust vents are present.
- Metal panel fastener rule
- Fasteners with sealing washers are driven to compress the gasket without dimpling the panel, and slotted holes allow thermal expansion movement.
- Single-ply seam testing
- Heat-welded thermoplastic seams are checked with a probe test along the seam edge before the membrane is accepted; failed seams are re-welded.
- OSHA fall protection trigger
- Employees exposed six feet or more above a lower level must be protected by guardrails, safety nets, or a personal fall-arrest system.
- Four-to-one ladder rule
- For every four feet of vertical rise, the ladder base sits one foot from the wall; the ladder extends three feet above the landing and is secured.
- Roof opening cover strength
- Covers over skylights and roof holes must support at least twice the weight of employees, equipment, and materials placed on them.
- Warning line distance
- On low-slope roofs, a warning line is erected at least six feet from the roof edge to mark the area where conventional fall protection is required.
- Slope factor calculation
- Multiplier applied to plan area to get true roof area: 1.118 for 4:12, 1.202 for 6:12, and 1.414 for 12:12 pitch.
- Roofing square definition
- One square equals 100 square feet of roof area. Material quantity equals roof area divided by 100, plus waste allowance.
- Waste allowance by complexity
- Add roughly 10 percent waste for a simple gable roof and 15 percent or more for hip and valley roofs with many cuts and penetrations.
- Slope arrow on roof plan
- The arrow points in the downhill direction, showing drainage. Ridge, hip, and valley lines are read relative to the arrow to confirm geometry.