EXAC Exam 3 2024/2025 Exam
Questions and Correct Answers | New
Update
Forms of Water Penetration - 🧠ANSWER ✔✔1. Kinetic energy of rain
2. Gravity flow
3. Surface tension
4. Capillary action
5. Pressure differential
Exterior Wall Systems - 🧠ANSWER ✔✔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.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 1
STATEMENT. ALL RIGHTS RESERVED
,4. Rainscreen: Air cavity as drainage plane on rigid water resistant airtight
wall.
PERS Wall - 🧠ANSWER ✔✔Pressure equalization rainscreen system.
- Uses vented cladding and air cavity
- Divided into compartments
Control Layers (4) (WAVT) - 🧠ANSWER ✔✔1 - Water
2 - Air
3 - Vapour
4 - Thermal
Air Barrier - 🧠ANSWER ✔✔1. Impermeable to air flow
2. Continuous over entire building enclosure
3. Able to withstand forces
4. Durable during lifetime
5. System rather then one component.
Interior Air Barrier - 🧠ANSWER ✔✔Gypsum Board: To be sealed at all
locations including bottom and top of stud, where it abuts a interior stud,
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 2
STATEMENT. ALL RIGHTS RESERVED
,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 - 🧠ANSWER ✔✔Air / Vapour barrier on exterior
sheathing or gypsum board.
Water Barrier - 🧠ANSWER ✔✔1. Resists bulk of water from entering wall
assembly from exterior
2. Behind exterior cladding
3. Channels water down drainage plane
Moisture Vapour Control - 🧠ANSWER ✔✔Vapour Barrier (0.1 perm or less)
- Class 1 vapour retarder
- Vapour diffuses from high humidity to low (hot to cold)
- use vapour barrier or vent
Ice Damming prevention - 🧠ANSWER ✔✔1. Seal ceiling from b/w interior
and attic
2. Vent attic
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 3
STATEMENT. ALL RIGHTS RESERVED
, 3. Proper eave flashing (24" - 36" from inside of wall)
Insulation Material - 🧠ANSWER ✔✔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 - 🧠ANSWER ✔✔1. Fiberglass R3.3
2. Mineral wool R3.3
- Sound insulation
- Non combustible
- Fire resistant
Rigid Foam - 🧠ANSWER ✔✔1. Cellular Glass R2.5 (Fire resistant,
impervious to moisture, dimensionally stable)
2. Foam plastics (flammable)
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 4
STATEMENT. ALL RIGHTS RESERVED
Questions and Correct Answers | New
Update
Forms of Water Penetration - 🧠ANSWER ✔✔1. Kinetic energy of rain
2. Gravity flow
3. Surface tension
4. Capillary action
5. Pressure differential
Exterior Wall Systems - 🧠ANSWER ✔✔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.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 1
STATEMENT. ALL RIGHTS RESERVED
,4. Rainscreen: Air cavity as drainage plane on rigid water resistant airtight
wall.
PERS Wall - 🧠ANSWER ✔✔Pressure equalization rainscreen system.
- Uses vented cladding and air cavity
- Divided into compartments
Control Layers (4) (WAVT) - 🧠ANSWER ✔✔1 - Water
2 - Air
3 - Vapour
4 - Thermal
Air Barrier - 🧠ANSWER ✔✔1. Impermeable to air flow
2. Continuous over entire building enclosure
3. Able to withstand forces
4. Durable during lifetime
5. System rather then one component.
Interior Air Barrier - 🧠ANSWER ✔✔Gypsum Board: To be sealed at all
locations including bottom and top of stud, where it abuts a interior stud,
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 2
STATEMENT. ALL RIGHTS RESERVED
,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 - 🧠ANSWER ✔✔Air / Vapour barrier on exterior
sheathing or gypsum board.
Water Barrier - 🧠ANSWER ✔✔1. Resists bulk of water from entering wall
assembly from exterior
2. Behind exterior cladding
3. Channels water down drainage plane
Moisture Vapour Control - 🧠ANSWER ✔✔Vapour Barrier (0.1 perm or less)
- Class 1 vapour retarder
- Vapour diffuses from high humidity to low (hot to cold)
- use vapour barrier or vent
Ice Damming prevention - 🧠ANSWER ✔✔1. Seal ceiling from b/w interior
and attic
2. Vent attic
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 3
STATEMENT. ALL RIGHTS RESERVED
, 3. Proper eave flashing (24" - 36" from inside of wall)
Insulation Material - 🧠ANSWER ✔✔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 - 🧠ANSWER ✔✔1. Fiberglass R3.3
2. Mineral wool R3.3
- Sound insulation
- Non combustible
- Fire resistant
Rigid Foam - 🧠ANSWER ✔✔1. Cellular Glass R2.5 (Fire resistant,
impervious to moisture, dimensionally stable)
2. Foam plastics (flammable)
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 4
STATEMENT. ALL RIGHTS RESERVED
