MS Roofing Contractor cheat sheet

Mississippi residential/roofing contractor licensure is administered by the Mississippi State Board of Contractors (MSBOC); a Certificate of Responsibility is required for public projects over the statutory threshold and for most residential work, so verify current thresholds and classifications before bidding.

Roofing work is generally classified under the Board's specialty or residential categories; the license must match the scope, and a residential license does not authorize commercial/public work - confirm classification before signing.

Certificate of Responsibility numbers must appear on bid documents and contracts where required; bidding or contracting without the required certificate can render the contract unenforceable and subject to Board discipline.

Standard license cycle: certificates are issued for a set term and must be renewed before expiration; late renewal triggers a penalty and may require reinstatement. Track the expiration date on every job file.

Board disciplinary grounds typically include fraud/deceit, incompetence, abandoning a project, failure to pay subcontractors/materials suppliers, and contracting outside the licensed classification.

Contract requirements: written contract for residential work must state scope, price, and payment terms; Mississippi law also imposes notice and right-to-cure procedures before certain residential defect claims.

Change orders must be written and signed by the owner before the work is performed; oral changes are the most common source of payment disputes and Board complaints.

Verify subcontractor licensure and insurance before subletting; the licensed contractor remains responsible to the owner for the sub's work and for unlicensed subletting violations.

Lien rights: Mississippi mechanics' lien claims require timely notice to the owner and filing within statutory deadlines after last furnishing labor/materials; a lien waiver signed in exchange for progress payment extinguishes that portion of the claim.

Gross profit = contract revenue − direct job costs (labor, material, equipment, subcontract). Net profit = gross profit − overhead. Overhead must be recovered in every bid or the job loses money at the bottom line.

Markup vs. margin: markup is applied to cost (price = cost × (1 + markup)); margin is profit as a percent of price (price = cost ÷ (1 − margin)). A 20% markup equals only a 16.7% margin.

Break-even revenue = total fixed overhead ÷ gross margin percentage. Use it to set the annual sales volume the company must hit before any profit exists.

Retainage: typical residential/roofing retainage is 5–10% held until final acceptance; carry retainage as a receivable and include it in cash-flow forecasting, not as available cash.

Cash-flow rule: bill progress payments at least monthly, bill materials on delivery where the contract allows, and keep a working-capital reserve equal to roughly 4–8 weeks of payroll and fixed costs.

Job cost coding: assign every invoice, timesheet, and equipment charge to a phase code (tear-off, decking, underlayment, shingles, flashing, cleanup) so actual vs. estimated cost can be compared at closeout.

Labor burden adds payroll taxes, workers' comp, insurance, and benefits to base wage; a $20/hr wage with 30% burden costs the job $26/hr. Bid labor at burdened rate, never at the raw wage.

Contingency and change-order log: track owner-directed changes separately from contract scope, price them with markup, and reconcile the log against the final invoice.

Key ratios: current ratio (current assets ÷ current liabilities) of 1.5 or better signals short-term solvency; a single job should not exceed roughly 25–30% of annual revenue to limit concentration risk.

Asphalt shingles: standard 3-tab and architectural (laminated) types; follow manufacturer's nailing schedule (typically 4 nails for 3-tab, 6 for architectural in high-wind zones) placed in the nail line, not above or below it.

Low-slope thresholds: asphalt shingles require a minimum slope of 2:12 (4:12 for some products); below that, use built-up, modified bitumen, or single-ply membranes. Underlayment requirements change at 4:12.

Underlayment: No. 15 felt is common; No. 30 felt or a synthetic membrane is used in valleys, at eaves for ice-dam protection, and under low-slope shingle applications.

Ice-dam protection membrane is required at eaves extending from the eave edge to at least 24 inches inside the exterior wall line (per code), and in valleys in many jurisdictions.

Flashing details: step flashing at sidewalls woven with each shingle course; counterflashing set into a reglet; kick-out flashing at wall/roof terminations to divert water away from siding.

Valley methods: open metal valley (usually 16–24 inch wide metal) or closed-cut/woven. Metal valley edges must be sealed with approved mastic and the metal must extend the full length.

Ventilation balance: net free vent area should be roughly 1:150 of attic floor area (1:300 with a vapor barrier and balanced intake/exhaust). Intake at soffit, exhaust at ridge; never exhaust at soffit.

Metal roofing: panels require purlins or solid decking per manufacturer, expansion allowance at fasteners (slotted holes/oversized), and fasteners with EPDM washers driven to compress the gasket without dimpling the panel.

TPO/EPDM single-ply: seams are heat-welded (TPO) or adhesive/seam-taped (EPDM); minimum slope for mechanically attached systems is typically 1/4:12 with positive drainage; inspect seam probe test before membrane acceptance.

OSHA fall protection: employees exposed 6 ft or more above a lower level must be protected by guardrail, safety net, or personal fall-arrest system; roofing work on low-slope roofs has specific warning-line and 15-ft rules.

Ladder rule (4:1): for every 4 ft of rise, the base is 1 ft out; ladders must extend 3 ft above the landing and be secured at the top.

Roof edge and hole protection: covers for skylights and roof openings must support twice the employee load; warning lines are set at least 6 ft from the edge for low-slope work.

Residential steep-slope: roof jacks/scaffolds or fall-arrest anchors are required; never walk a roof with a slope steeper than 8:12 without fall protection and roof brackets.

Hazard communication and PPE: eye protection for nailing/tear-off, hearing protection near compressors, gloves for hot kettles, and respiratory protection when cutting or grinding.

Plan reading: identify the roof plan, slope arrows (arrow points downhill), ridge/valley/hip lines, and the roof legend that maps hatch patterns to material and slope.

Scale and takeoff: convert plan dimensions to actual with the stated scale (e.g., 1/4 in = 1 ft); compute roof area from plan area × slope factor (1.118 for 4:12, 1.202 for 6:12, 1.414 for 12:12).

Squares: 1 roofing square = 100 sq ft. Order material = roof area ÷ 100, plus waste (typically 10% for simple gable, 15% for complex hips/valleys).

Code references: IRC Chapter 9 (Roof Assemblies) governs residential roofing; IBC Chapter 15 governs commercial. Check local amendments and wind/uplift design pressures from the drawings before ordering fasteners.

Mississippi residential/roofing contractor licensure is administered by the Mississippi State Board of Contractors (MSBOC); a Certificate of Responsibility is required for public projects over the statutory threshold and for most residential work, so verify current thresholds and classifications before bidding.

Roofing work is generally classified under the Board's specialty or residential categories; the license must match the scope, and a residential license does not authorize commercial/public work - confirm classification before signing.

Certificate of Responsibility numbers must appear on bid documents and contracts where required; bidding or contracting without the required certificate can render the contract unenforceable and subject to Board discipline.

Standard license cycle: certificates are issued for a set term and must be renewed before expiration; late renewal triggers a penalty and may require reinstatement. Track the expiration date on every job file.

Board disciplinary grounds typically include fraud/deceit, incompetence, abandoning a project, failure to pay subcontractors/materials suppliers, and contracting outside the licensed classification.

Contract requirements: written contract for residential work must state scope, price, and payment terms; Mississippi law also imposes notice and right-to-cure procedures before certain residential defect claims.

Change orders must be written and signed by the owner before the work is performed; oral changes are the most common source of payment disputes and Board complaints.

Verify subcontractor licensure and insurance before subletting; the licensed contractor remains responsible to the owner for the sub's work and for unlicensed subletting violations.

Lien rights: Mississippi mechanics' lien claims require timely notice to the owner and filing within statutory deadlines after last furnishing labor/materials; a lien waiver signed in exchange for progress payment extinguishes that portion of the claim.

Gross profit = contract revenue − direct job costs (labor, material, equipment, subcontract). Net profit = gross profit − overhead. Overhead must be recovered in every bid or the job loses money at the bottom line.

Markup vs. margin: markup is applied to cost (price = cost × (1 + markup)); margin is profit as a percent of price (price = cost ÷ (1 − margin)). A 20% markup equals only a 16.7% margin.

Break-even revenue = total fixed overhead ÷ gross margin percentage. Use it to set the annual sales volume the company must hit before any profit exists.

Retainage: typical residential/roofing retainage is 5–10% held until final acceptance; carry retainage as a receivable and include it in cash-flow forecasting, not as available cash.

Cash-flow rule: bill progress payments at least monthly, bill materials on delivery where the contract allows, and keep a working-capital reserve equal to roughly 4–8 weeks of payroll and fixed costs.

Job cost coding: assign every invoice, timesheet, and equipment charge to a phase code (tear-off, decking, underlayment, shingles, flashing, cleanup) so actual vs. estimated cost can be compared at closeout.

Labor burden adds payroll taxes, workers' comp, insurance, and benefits to base wage; a $20/hr wage with 30% burden costs the job $26/hr. Bid labor at burdened rate, never at the raw wage.

Contingency and change-order log: track owner-directed changes separately from contract scope, price them with markup, and reconcile the log against the final invoice.

Key ratios: current ratio (current assets ÷ current liabilities) of 1.5 or better signals short-term solvency; a single job should not exceed roughly 25–30% of annual revenue to limit concentration risk.

Asphalt shingles: standard 3-tab and architectural (laminated) types; follow manufacturer's nailing schedule (typically 4 nails for 3-tab, 6 for architectural in high-wind zones) placed in the nail line, not above or below it.

Low-slope thresholds: asphalt shingles require a minimum slope of 2:12 (4:12 for some products); below that, use built-up, modified bitumen, or single-ply membranes. Underlayment requirements change at 4:12.

Underlayment: No. 15 felt is common; No. 30 felt or a synthetic membrane is used in valleys, at eaves for ice-dam protection, and under low-slope shingle applications.

Ice-dam protection membrane is required at eaves extending from the eave edge to at least 24 inches inside the exterior wall line (per code), and in valleys in many jurisdictions.

Flashing details: step flashing at sidewalls woven with each shingle course; counterflashing set into a reglet; kick-out flashing at wall/roof terminations to divert water away from siding.

Valley methods: open metal valley (usually 16–24 inch wide metal) or closed-cut/woven. Metal valley edges must be sealed with approved mastic and the metal must extend the full length.

Ventilation balance: net free vent area should be roughly 1:150 of attic floor area (1:300 with a vapor barrier and balanced intake/exhaust). Intake at soffit, exhaust at ridge; never exhaust at soffit.

Metal roofing: panels require purlins or solid decking per manufacturer, expansion allowance at fasteners (slotted holes/oversized), and fasteners with EPDM washers driven to compress the gasket without dimpling the panel.

TPO/EPDM single-ply: seams are heat-welded (TPO) or adhesive/seam-taped (EPDM); minimum slope for mechanically attached systems is typically 1/4:12 with positive drainage; inspect seam probe test before membrane acceptance.

OSHA fall protection: employees exposed 6 ft or more above a lower level must be protected by guardrail, safety net, or personal fall-arrest system; roofing work on low-slope roofs has specific warning-line and 15-ft rules.

Ladder rule (4:1): for every 4 ft of rise, the base is 1 ft out; ladders must extend 3 ft above the landing and be secured at the top.

Roof edge and hole protection: covers for skylights and roof openings must support twice the employee load; warning lines are set at least 6 ft from the edge for low-slope work.

Residential steep-slope: roof jacks/scaffolds or fall-arrest anchors are required; never walk a roof with a slope steeper than 8:12 without fall protection and roof brackets.

Hazard communication and PPE: eye protection for nailing/tear-off, hearing protection near compressors, gloves for hot kettles, and respiratory protection when cutting or grinding.

Plan reading: identify the roof plan, slope arrows (arrow points downhill), ridge/valley/hip lines, and the roof legend that maps hatch patterns to material and slope.

Scale and takeoff: convert plan dimensions to actual with the stated scale (e.g., 1/4 in = 1 ft); compute roof area from plan area × slope factor (1.118 for 4:12, 1.202 for 6:12, 1.414 for 12:12).

Squares: 1 roofing square = 100 sq ft. Order material = roof area ÷ 100, plus waste (typically 10% for simple gable, 15% for complex hips/valleys).

Code references: IRC Chapter 9 (Roof Assemblies) governs residential roofing; IBC Chapter 15 governs commercial. Check local amendments and wind/uplift design pressures from the drawings before ordering fasteners.