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Z-Craft Roofing Aptitude Test — Overview

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12
Active Applicants
✓
73%
RAT Pass Rate
📈
64%
Training Completion
💼
3
Open Positions
Recent Activity View All
Marcus T. completed RAT — Score: 88% (A)
2 hours ago
Jenny K. started Training Ch. 3
4 hours ago
New application received — Robert D.
Yesterday
Dave L. passed Training Quiz Ch. 5
Yesterday
Tony W. started RAT Assessment
2 days ago
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Team Training Progress
WRB Installation
85%
Standing Seam
62%
Coping Caps
71%
Window Flashing
45%
Flat Roof
33%
Safety
90%

Roofing Aptitude Test

Assess candidate knowledge across 4 core categories with 20 questions.

Candidate Information

Complete the form below to begin the assessment. All fields required.

Training Portal

Comprehensive training modules for Z-Craft standards and procedures.

64%
01
WRB Installation
3 lessons • 38 min
Complete ✓
02
Standing Seam Metal
4 lessons • 52 min
In Progress
03
Coping Caps & Edge Metal
3 lessons • 30 min
In Progress
04
Window & Penetration Flashing
4 lessons • 44 min
In Progress
05
Flat Roof Systems (TPO / EPDM)
4 lessons • 48 min
In Progress
06
Jobsite Safety & OSHA
3 lessons • 35 min
Complete ✓
07
Measurement & Estimation
3 lessons • 40 min
Not Started
08
Customer Communication
2 lessons • 22 min
Not Started

Field Guide

Quality vs Quality — The Z-Craft Standard

Z-Craft

Quality vs Quality™

The Z-Craft Field Guide — 2026 Edition
By Zach Taylor

Table of Contents

1WRB & Underlayment
→
2Standing Seam Installation
→
3Coping Caps & Edge Metal
→
4Window & Penetration Flashing
→
5Flat Roof Systems
→
6Fasteners & Sealants
→
7Roof Drainage & Gutters
→
8Safety & Best Practices
→
1 Chapter One

WRB & Underlayment

The Weather Resistive Barrier (WRB) is the last line of defense between the elements and the structure. Most contractors treat this step as a formality — at Z-Craft, it's the foundation of every job. Proper WRB installation prevents moisture intrusion, protects the substrate, and extends roof life by decades.

Substandard Practice
Synthetic felt loosely stapled with gaps and wrinkles. No overlap consideration. WRB installed bottom-to-top with reverse laps that channel water behind the barrier. Exposed substrate at seams.
Z-Craft Standard
Self-adhered WRB applied in shingle fashion (bottom to top), with minimum 6" horizontal laps and 12" vertical laps. Cap nails at 6" OC on laps. No wrinkles, no fish mouths, no exposed deck. Sealed at every penetration with compatible flashing tape.
Key Takeaway

Every roof leak traces back to a failure at the WRB layer. Install it like it's the final waterproofing layer — because if the roof system fails, it is.

2 Chapter Two

Standing Seam Installation

Standing seam metal roofing is the premium product Z-Craft is known for. Proper panel alignment, clip spacing, and seaming technique separate a 50-year roof from a 10-year headache. Every panel must be straight, every seam must be tight, and every detail must be manufacturer-spec.

Substandard Practice
Panels face-fastened through the flat, exposed screws, inconsistent clip spacing (24"+ OC), no allowance for thermal expansion. Seams left partially open. Oil-canning visible across the roof field.
Z-Craft Standard
Concealed clip system at 12"-16" OC per spec. Panels mechanically seamed (double-lock) with electric seamer. Fixed and floating clip zones calculated for thermal movement. Straight chalk lines snapped for alignment. Zero exposed fasteners on field panels.
Key Takeaway

A standing seam roof is only as good as its weakest seam. One improperly crimped panel, one missed clip — that's where the failure starts. Precision is non-negotiable.

3 Chapter Three

Coping Caps & Edge Metal

Edge metal and coping caps protect the most vulnerable parts of any roof — the perimeter. Wind uplift, water intrusion, and aesthetic failure all start at the edges. Z-Craft treats edge details with the same precision as the field of the roof.

Substandard Practice
Coping caps butt-jointed with caulk-only seals. No cleats, no continuous cleat bar. Joints open within one thermal cycle. Caulk fails in 2-3 years. Water enters the wall cavity behind the parapet.
Z-Craft Standard
Continuous cleat bar mechanically fastened at 12" OC. Coping caps with 4" lapped and riveted joints, plus sealant between lap faces. Expansion joints at 20' intervals. End dams fabricated and sealed at all terminations.
Key Takeaway

Edge metal fails are the #1 warranty callback. Get the edges right and you eliminate 80% of potential callbacks.

4 Chapter Four

Window & Penetration Flashing

Every pipe boot, vent, HVAC curb, and window opening is a potential leak point. The Z-Craft flashing protocol turns penetrations from liabilities into permanently sealed details. No corners cut, no steps skipped.

Substandard Practice
Pipe boots installed with no sealant ring, flashing tape applied in wrong sequence (top before sides), window flashing reverse-lapped at sill. Self-adhered membrane applied over dusty substrate — won't bond. Penetrations sealed with caulk only.
Z-Craft Standard
Full flashing sequence: sill pan first, then jambs, then head flashing — always shingled. Self-adhered membrane on clean, primed substrate. Pipe boots with stainless steel band clamp and compatible sealant. Every penetration gets a full flashing collar, not just caulk.
Key Takeaway

Flashing is about sequence as much as materials. The right product in the wrong order is still a leak waiting to happen.

5 Chapter Five

Flat Roof Systems

Low-slope and flat roof systems (TPO, EPDM, modified bitumen) demand meticulous attention to membrane seaming, insulation attachment, and drainage. Z-Craft flat roof installations meet or exceed manufacturer specifications for full warranty coverage.

Substandard Practice
TPO seams hot-aired too fast — incomplete weld. No probing of seams post-weld. Insulation boards not staggered at joints. Ponding water with no tapered cricket. Flashing membrane not terminated with compression bar.
Z-Craft Standard
TPO welded at manufacturer-spec temp/speed, every seam probed within 15 minutes. Polyiso insulation staggered with offset joints and adhered. Tapered insulation for positive drainage at 1/4" per foot minimum. All flashings terminated into reglet or compression bar with sealant.
Key Takeaway

Flat roofs punish shortcuts. Every seam must be tested, every detail terminated properly. There's no roof pitch to save you — water sits where you let it.

6 Chapter Six

Fasteners & Sealants

The invisible elements — fasteners and sealants — are responsible for more roof failures than most installers realize. Wrong fastener length, incompatible metals, degraded sealant — these silent failures compound over time until the roof system fails catastrophically.

Substandard Practice
Galvanized fasteners used with aluminum panels (galvanic corrosion). Silicone sealant on TPO membrane (incompatible). Over-driven screws that crack the substrate. Sealant applied to wet or dirty surfaces.
Z-Craft Standard
Fastener material matched to panel material — stainless with stainless, galvalume with galvalume. Sealant compatibility verified per manufacturer spec sheet. Screw pullout tests performed on every substrate type. Sealant applied to clean, dry, primed surfaces within temperature range.
Key Takeaway

Galvanic corrosion is the silent killer. If two dissimilar metals touch each other in the presence of moisture, one of them will corrode. Match your metals, verify your sealants.

7 Chapter Seven

Roof Drainage & Gutters

Water management doesn't end at the roof edge — it continues through the gutter system and downspouts. Proper sizing, slope, and attachment ensure water moves away from the structure reliably for the life of the system.

Substandard Practice
5" K-style gutters on a 2,500 sq ft roof section (undersized). Gutter hung level with no slope. Downspouts discharge directly against foundation. Gutter seams sealed with silicone caulk that fails in one season.
Z-Craft Standard
Gutter sized by roof area and rainfall intensity (minimum 6" for most applications). Installed at 1/16" per foot slope toward downspouts. Seamless aluminum with factory-applied sealant. Downspouts sized at 1 per 30 linear feet of gutter, extended 4' minimum from foundation.
Key Takeaway

The best roof in the world fails if the water has nowhere to go. Size your gutters for worst-case rainfall, not average conditions.

8 Chapter Eight

Safety & Best Practices

Every Z-Craft crew member goes home at the end of the day. Period. Safety is not negotiable, not optional, and not something that slows you down — it's something that keeps you alive. OSHA compliance is the floor, not the ceiling.

Substandard Practice
No fall protection on slopes under 8/12. Harness worn but not tied off. Ladders not secured at top. Extension cords running through standing water. No GFCI protection on tools. Hard hats "optional" on low structures.
Z-Craft Standard
100% tie-off above 6' (OSHA minimum). Harness inspected daily before use. Ladders secured at top with stabilizer and extend 3' above roof line. All power tools on GFCI circuits. Hard hats mandatory on every job. Toolbox talks every morning. Near-miss reporting encouraged.
Key Takeaway

No roof is worth a life. No shortcut saves enough time to justify the risk. Every Z-Craft crew member has the authority — and the responsibility — to stop work for safety.

Hiring Pipeline

Track candidates from application to hire in one view.

12
Total Applicants
8
Passed RAT
5
Interviewed
3
Hired
Applied 3
RD
Robert D.
Roofing Installer
⏳ Pending RAT
SM
Sarah M.
Estimator
⏳ Pending RAT
CG
Carlos G.
Apprentice / Laborer
⏳ Pending RAT
RAT Complete 4
MT
Marcus T.
Standing Seam Specialist
88% — Grade A
TW
Tony W.
Roofing Installer
72% — Grade B
JK
Jenny K.
Project Manager
92% — Grade A
MR
Mike R.
Roofing Installer
48% — Grade F
Interviewed 2
DL
Dave L.
Standing Seam Specialist
85% — Grade A
LP
Linda P.
Estimator
90% — Grade A
Hired 3
JB
James B.
Roofing Installer
82% — Grade A
AV
Ana V.
Project Manager
95% — Grade A
DH
Derek H.
Standing Seam Specialist
88% — Grade A

Applicant Results

Complete test results and scoring breakdown for all candidates.

Name Position Date Score Grade Category Scores Status Actions
Ana V. Project Manager Apr 10, 2026 95% A
5/5 5/5 5/5 4/5
Hired
Jenny K. Project Manager Apr 14, 2026 92% A
5/5 4/5 5/5 4/5
Passed
Linda P. Estimator Apr 12, 2026 90% A
5/5 4/5 5/5 4/5
Passed
Marcus T. Standing Seam Specialist Apr 15, 2026 88% A
4/5 5/5 4/5 5/5
Passed
Derek H. Standing Seam Specialist Apr 8, 2026 88% A
5/5 4/5 4/5 5/5
Hired
Dave L. Standing Seam Specialist Apr 11, 2026 85% A
4/5 4/5 5/5 4/5
Passed
Tony W. Roofing Installer Apr 13, 2026 72% B
4/5 3/5 4/5 3/5
Passed
Mike R. Roofing Installer Apr 9, 2026 48% F
2/5 3/5 2/5 3/5
Failed