EXAC EXAM 3 WITH VERIFIED QUESTIONS
AND ANSWERS [ GRADED A+]
Forms of Water Penetration - ✔✔1. Kinetic energy of rain
2. Gravity flow
3. Surface tension
4. Capillary action
5. Pressure differential
Exterior Wall Systems - ✔✔1. Mass Wall (concrete, masonry): Sheds most,
absorbs and dry remaining
2. Barrier Wall (EIFS): Relies on continuous seal, maintenance
3. Drainage Wall (Stucco, siding): Drainage plane w/ moisture barrier.
©morren 2025/2026. Year published 2026.
,4. Rainscreen: Air cavity as drainage plane on rigid water resistant airtight wall.
PERS Wall - ✔✔Pressure equalization rainscreen system.
- Uses vented cladding and air cavity
- Divided into compartments
Control Layers (4) (WAVT) - ✔✔1 - Water
2 - Air
3 - Vapour
4 - Thermal
Air Barrier - ✔✔1. Impermeable to air flow
2. Continuous over entire building enclosure
3. Able to withstand forces
4. Durable during lifetime
©morren 2025/2026. Year published 2026.
,5. System rather then one component.
Interior Air Barrier - ✔✔Gypsum Board: To be sealed at all locations including
bottom and top of stud, where it abuts a interior stud, around windows and
doors, top plate of partition wall where adjacent to a unconditioned space.
Poly: Seal at all locations as per above
Exterior Air Barrier - ✔✔Air / Vapour barrier on exterior sheathing or gypsum
board.
Water Barrier - ✔✔1. Resists bulk of water from entering wall assembly from
exterior
2. Behind exterior cladding
3. Channels water down drainage plane
Moisture Vapour Control - ✔✔Vapour Barrier (0.1 perm or less)
©morren 2025/2026. Year published 2026.
, - Class 1 vapour retarder
- Vapour diffuses from high humidity to low (hot to cold)
- use vapour barrier or vent
Ice Damming prevention - ✔✔1. Seal ceiling from b/w interior and attic
2. Vent attic
3. Proper eave flashing (24" - 36" from inside of wall)
Insulation Material - ✔✔1. Batt or Blanket - 3.3
2. Rigid Board - 4 - 7
3. Foam in place - 6
4. Loose fill - 3
5. Cast - 1.5
Batt insulations - ✔✔1. Fiberglass R3.3
2. Mineral wool R3.3
©morren 2025/2026. Year published 2026.
AND ANSWERS [ GRADED A+]
Forms of Water Penetration - ✔✔1. Kinetic energy of rain
2. Gravity flow
3. Surface tension
4. Capillary action
5. Pressure differential
Exterior Wall Systems - ✔✔1. Mass Wall (concrete, masonry): Sheds most,
absorbs and dry remaining
2. Barrier Wall (EIFS): Relies on continuous seal, maintenance
3. Drainage Wall (Stucco, siding): Drainage plane w/ moisture barrier.
©morren 2025/2026. Year published 2026.
,4. Rainscreen: Air cavity as drainage plane on rigid water resistant airtight wall.
PERS Wall - ✔✔Pressure equalization rainscreen system.
- Uses vented cladding and air cavity
- Divided into compartments
Control Layers (4) (WAVT) - ✔✔1 - Water
2 - Air
3 - Vapour
4 - Thermal
Air Barrier - ✔✔1. Impermeable to air flow
2. Continuous over entire building enclosure
3. Able to withstand forces
4. Durable during lifetime
©morren 2025/2026. Year published 2026.
,5. System rather then one component.
Interior Air Barrier - ✔✔Gypsum Board: To be sealed at all locations including
bottom and top of stud, where it abuts a interior stud, around windows and
doors, top plate of partition wall where adjacent to a unconditioned space.
Poly: Seal at all locations as per above
Exterior Air Barrier - ✔✔Air / Vapour barrier on exterior sheathing or gypsum
board.
Water Barrier - ✔✔1. Resists bulk of water from entering wall assembly from
exterior
2. Behind exterior cladding
3. Channels water down drainage plane
Moisture Vapour Control - ✔✔Vapour Barrier (0.1 perm or less)
©morren 2025/2026. Year published 2026.
, - Class 1 vapour retarder
- Vapour diffuses from high humidity to low (hot to cold)
- use vapour barrier or vent
Ice Damming prevention - ✔✔1. Seal ceiling from b/w interior and attic
2. Vent attic
3. Proper eave flashing (24" - 36" from inside of wall)
Insulation Material - ✔✔1. Batt or Blanket - 3.3
2. Rigid Board - 4 - 7
3. Foam in place - 6
4. Loose fill - 3
5. Cast - 1.5
Batt insulations - ✔✔1. Fiberglass R3.3
2. Mineral wool R3.3
©morren 2025/2026. Year published 2026.
