Metal roofs, walls and rainscreens
How to classify a metal roof or wall, which code sections and tests qualify it, why a rating belongs to one tested assembly, and how to select, review and diagnose a panel system, with installation order and oil canning.
4 lessons · about 51 min · 14 diagrams · 5 videos
Version 1.0.0
Builds on these modules
Lessons
0 of 4 complete
Lesson 1 · 11 min · 12 slides · 8 questions
Metal roofs, walls and rainscreens: principles and terminology
Structural and non-structural panels, water-shedding and water-barrier panels, standing seam and through-fastened attachment, metal veneer and MCM, rainscreen walls, and what AFS makes within that picture.
You will be able to: Classify a metal roof or wall by span, water strategy and attachment, define the terms of panel types and rainscreen walls, say where AFS fits, and state the safety boundary for observing roof work.
Not startedStart →Lesson 2 · 14 min · 12 slides · 12 questions
Metal roofs, walls and rainscreens: materials, standards and design constraints
The IBC wind and test routes for metal roofs, code and maker minimum slopes, what each uplift, water, air and rainscreen test measures, why a rating belongs to its assembly, and material thickness minimums.
You will be able to: Name the code sections and test standards that govern metal roof and wall systems, apply code and maker minimum slopes, read a rating as belonging to one assembly, and compare material thickness with code minimums.
Not startedStart →Lesson 3 · 14 min · 12 slides · 12 questions
Metal roofs, walls and rainscreens: methods and worked application
The eleven-step method, matching a rating to a demand, wall cavity and fire limits, panel counts and movement worked from AFS registers, the order a standing seam roof is installed, and the oil-canning clause.
You will be able to: Apply an eleven-step method to select and review a metal panel system, compare listed ratings with a hypothetical demand by zone, count panels, work out thermal movement, and recognize the order a standing seam roof goes on.
Not startedStart →Lesson 4 · 12 min · 11 slides · 11 questions
Metal roofs, walls and rainscreens: defects, verification and case study
A rating misapplied, seams that let go, slope and water mismatches, oil canning from restraint, blocked rainscreen cavities, MCM above 40 feet, thin metal, the evidence packet and a constructed clinic roof case.
You will be able to: Diagnose eight common defects in metal roofs and walls, name the evidence that verifies an installed system, and work a constructed case study from symptoms to documented corrective options.
Not startedStart →
Practical task
Build a job packet for one metal roof or wall of your own design (or a project you have worked on): classify it, check slope and rating against a stated demand, choose the wall or roof assembly, write the oil-canning clause, and diagnose one plausible defect.
Hand in
- A decision rationale: the code edition and authority having jurisdiction, the panel or wall type with the three classification answers, and the test route the code allows for it
- A marked-up section of the roof edge or wall, showing deck or sheathing, clips or fasteners, barrier and cavity where used, with each layer labelled
- An assumptions table with units: slope, panel width, length, thickness, deck, clip spacing, and the engineer's demand by zone, each marked as given, sourced or assumed
- A review checklist for the submittal: every rating document matched line by line to the installed assembly, with the evidence photographed before it is covered
- A defect analysis for one plausible defect from lesson four: symptoms, likely cause, evidence to collect, and the corrective options that belong to the engineer of record
Rubric
| Criterion | Meets the standard when |
|---|---|
| Classification | The system is classified by span, water strategy and attachment, with the source of each definition named. |
| Slope | Slope is checked against both the code floor and the maker's minimum, and the stricter is used. |
| Rating match | A listed rating is compared with the demand for the same assembly only, rows are read as printed, and nothing is interpolated. |
| Material and wall | Thickness is checked against the code table for the product type, and a wall states its barrier, cavity type and any MCM height rule. |
| Appearance | The oil-canning clause names the measures taken and the acceptance basis, and does not promise total prevention. |
| Boundaries | The packet leaves design and the choice of rating to the engineer of record, and observation at height follows the contractor's fall protection plan. |