Roof, wall and foundation transitions
Where a roof, a wall and a foundation hand over their water, air, vapor and thermal layers: the code and publisher numbers with their datums, a transition schedule and worked examples, and the defects a designer can catch on a drawing.
4 lessons · about 41 min · 12 diagrams · 2 videos
Version 1.0.0
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Lessons
0 of 4 complete
Lesson 1 · 9 min · 10 slides · 6 questions
Roof, wall and foundation transitions: principles and terminology
Why transitions are where enclosures fail, the control layers that must carry through, the roof-to-wall, eave-to-sidewall and wall-base conditions, the vocabulary, the three datums, who is responsible for each piece, and the safety boundary.
You will be able to: Name the three transitions where a roof, a wall and a foundation meet, say which control layers and which metal pieces cross each one, define the terms a detail uses, and state the datum each dimension is measured from.
Not startedStart →Lesson 2 · 11 min · 12 slides · 7 questions
Roof, wall and foundation transitions: materials, standards and design constraints
The code text on flashing, parapets and overflow, the sidewall and cricket rules, the heights and laps different documents set, base-of-wall clearances and grade, the metals that suit masonry, flood-zone materials and the ASTM wall guide.
You will be able to: Identify the code sections, publisher values and material limits that govern roof-to-wall, eave-to-sidewall and wall-base transitions, say which datum and which document each number belongs to, and recognise what the code leaves to the detail.
Not startedStart →Lesson 3 · 11 min · 11 slides · 7 questions
Roof, wall and foundation transitions: methods and worked application
A transition schedule, the nine checks in order, a reroof datum example with tapered insulation, the build order at a rising wall, a sidewall and a wall base, stepped flashing on sloping ground, a screed buried by landscaping, and the shop drawing check.
You will be able to: Apply a nine-check method to a roof, wall and foundation transition set, fixing the datum for every height, working a reroof, a stepped wall base and a planting-bed example with every assumption labelled, and checking an AFS shop drawing against the schedule.
Not startedStart →Lesson 4 · 10 min · 12 slides · 6 questions
Roof, wall and foundation transitions: defects, verification and case study
The defects that recur at roof-to-wall, coping-to-wall, eave-to-sidewall and wall-base transitions, what to inspect and record, and a fictional clinic case study that finds three of them and writes the corrections.
You will be able to: Diagnose the recurring transition defects, from a reroof that outgrows its receiver to a screed buried by landscaping, say what evidence verifies each, and work a fictional case study into a corrected schedule and a request-for-information log.
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Practical task
Build a transition schedule for one building you can draw or are given (a low roof against a wall, a sloped roof at a sidewall, and the wall base at grade): list each transition, name the layers on both sides and the joining piece, fix each datum, check every height against the document that sets it, and diagnose one defect.
Hand in
- A marked-up section sketch for each of the three transition types, with the roof deck, roof surface and finished ground datums written on them
- A transition schedule: location, layers each side, joining piece, datum, measured height, governing document, spec section and trade, build order, and what stays removable
- A table of every number used, each with its publisher (code, BIA, IKO, UFGS, DOE) and its datum, and a note where two documents disagree and which governs
- One worked reroof or regrade check with every assumption labelled, showing the arithmetic, and the options you would put to the designer of record
- A completed inspection card with measured values, plus one defect with its cause, the evidence you would keep, and the request for information you would send
Rubric
| Criterion | Meets the standard when |
|---|---|
| Layers and joining pieces | Each transition names the water, air, vapor and thermal layers on both sides and the piece that carries each across, with no layer left to others. |
| Datums | Every height states its datum (roof deck, roof surface or finished ground), and the schedule converts between datums where documents differ. |
| Governing documents | Each number names the code section or publisher it comes from, labels manufacturer and guidance values as such, and never presents a publisher value as code. |
| Arithmetic | The reroof or regrade check shows units and labels every assumption, and states the margin or shortfall. |
| Defect diagnosis | The defect is traced to a cause, the evidence list would let a reviewer check it, and the repair is left to the designer of record. |