Exam guide · ARE 5.0 / PDD
Project Development & Documentation (PDD)
exam prep.
PDD is where a design becomes buildable. It tests how materials and systems come together in assemblies and details, and how that intent is captured in drawings, specifications and estimates.
What is the PDD exam?
Project Development & Documentation covers design development and construction documents. It assesses the integration and documentation of building systems, material selection and material assemblies into a project.
Where Project Planning & Design (PPD) asks which system to choose, PDD asks how it actually goes together: how a wall keeps water out while letting moisture dry, how structure, ductwork and ceilings share the same space, what belongs on the drawings versus in the specifications, and what the coordinated result will cost.
PDD questions reward the habit of reading a detail layer by layer. Many wrong answers describe something that sounds right in general but fails in the specific assembly, climate or code situation the question describes.
What does PDD cover?
The division is organized into five content areas:
- 1Integration of Building Materials & SystemsDeveloping how structure, envelope, mechanical, electrical, plumbing and interior systems fit and work together in assemblies and details.
- 2Construction DocumentationProducing and coordinating the drawings that communicate the design to the contractor: plans, sections, details and schedules.
- 3Project Manual & SpecificationsWriting and organizing the specifications and the project manual, and keeping them consistent with the drawings.
- 4Codes & RegulationsApplying code requirements at the level of assemblies and details, such as fire-resistance ratings, egress components and accessibility.
- 5Construction Cost EstimatesEstimating the cost of the developed design and keeping it aligned with the budget as documents progress.
A concept worth understanding: the four control layers of a wall
A useful way to read any wall section is to look for the layers that control four things: water, air, vapor and heat. Every exterior wall needs each one to be continuous, and many detailing questions come down to whether one of them has a gap.
Reading the section from outside in:
- Water is shed by the cladding; whatever gets behind it drains down the ventilated gap and is stopped by the water-resistive barrier (WRB) on the sheathing, then directed out by flashing at openings and the base of the wall.
- Air is controlled by an air barrier that must be continuous across the whole envelope — including transitions to the roof, foundation, windows and penetrations. Here the same membrane acts as WRB and air barrier.
- Heat is controlled by insulation. Putting a continuous layer outside the framing interrupts the thermal bridging that studs create through cavity insulation.
- Vapor control is the most climate-dependent layer. Where it belongs, and how vapor-open it should be, depends on the climate zone and on how much of the insulation sits outside the sheathing — which is why codes set vapor retarder requirements by climate zone.
How to study for ARE PDD
- Read details layer by layer. For every wall, roof and foundation detail you study, trace the water, air, vapor and thermal layers and find where each one transitions.
- Learn how documents divide the work: what is shown on drawings (quantity, location, relationships) versus what is written in specifications (quality, materials, execution), and how conflicts between them are resolved.
- Coordinate systems in section. Practice locating structure, ducts, sprinklers, lighting and ceilings in the same ceiling space and spotting conflicts.
- Study code at the assembly level — fire-resistance-rated assemblies, opening protection and egress components — rather than only at the building level.
- Finish with full-length practice exams under timed conditions, then review the latest ARE 5.0 Guidelines so your preparation matches the current objectives.
How KPath supports PDD
KPath’s structured PPD + PDD course is live, organized as a day-by-day roadmap of illustrated lessons with coded, rated knowledge points. PDD practice includes a 200-question fixed set and AI-generated questions drawn from the course’s knowledge points; each question links back to the exact lesson and knowledge point it tests. Explanations analyze every option, in English, English + 中文 or English + Español. KPath is currently in private beta.
PDD FAQ
How is PDD different from PPD?
PPD is about choosing and integrating systems in early design; PDD is about developing them into coordinated assemblies and documenting them in drawings, specifications and estimates.
What drawings should I know for PDD?
Plans, building and wall sections, details and schedules — and, more importantly, what each type of drawing is responsible for communicating and how they cross-reference one another and the specifications.
What is the role of specifications in PDD?
Specifications describe the quality of materials and workmanship and how work is executed, while drawings show quantity, size and location. PDD tests how the project manual is organized and how specifications and drawings stay consistent.
How should I study building envelope details?
Use the four control layers — water, air, vapor, heat — as a checklist. For each detail, find each layer and confirm it is continuous across joints, openings and transitions.
Keep studying
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Understand the detail, not just the drawing.
KPath’s PPD + PDD course explains assemblies, documents and specifications day by day, with illustrated lessons, coded knowledge points and practice questions that link back to the lesson they test.
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