EXAC - SECTION 3 - FINAL PROJECT EXAM STUDY GUIDE LATEST 2026
UPDATED QUESTIONS AND VERIFIED 100% SOLUTIONS (2026/2027)
GRADE: A+|STATUS: GUARANTEED PASS
What is a Vapour Barrier? - Answers -Vapour Barriers:
Material of low vapour permeance installed as close as possible to the warm side of an
insulated assembly. They prevent moisture from entering a building to where it could condense
into a liquid.
What is a Mat foundation? What is a Floating Foundation? - Answers -Mat Foundation:
Used when the allowable bearing capacity of a foundation soil is low relative to building loads
and interior column footings become so large that it becomes more economical to merge them
into a single slab
Floating foundation:
Used in yielding soil, has for its footing a mat placed deep enough that the weight of the
excavated soil is equal to or greater than the weight of construction supported
In pole foundations, what does the required embedment length depend on? - Answers -
Required embedment length depends on:
-Slope of site
-Subsurface soil conditions
-Pole spacing
-Seismic zone
-Unsupported height of poles
1|Page
,What are the 2 principle types of deep foundations? Explain each type. - Answers -Pile
Foundation:
System of end bearing or friction piles, pile caps, and tie beams for transferring building loads
down to a suitable bearing stratum
Caisson Foundation:
CIP/plain or reinforced concrete piers formed by boring with a large auger or excavating and
filling with concrete (also called drilled piles/piers)
What are the 4 principle control layers in a wall? - Answers -Rain Control - ie cladding
Air Control - ie air barrier
Vapour Control - ie vapour barrier
Thermal Control - ie insulation
Discuss mass as it relate to sound transmission through GWB. - Answers -Mass (more
specifically, density)
Mass reduces sound transmission (more dense=better STC)
a. Doubling GWB weight can add 10 points to STC rating (go by weight, not thickness - have to
be sure because test data could be outdated)
b. Increase mass by adding more layers of GWB (from 1 to 2)
c. DONT add internal layer of GWB to increase STC, this actually lowers STC (it creates another
rigid connection which makes any absorptive material useless, and the second layer reduces the
depth of the wall cavity (more cavity depth=more STC)
2|Page
,Discuss the separation of layers as it relate to sound transmission through GWB. - Answers -
Separation of Layers: Air space increase transmission loss
a. Staggered Stud partitions reduce sound transmission between adjacent rooms
b. Double studs achieves similar effect to staggered studs.
c. Resilient Channel (metal) to one face of a single row of studs increases STC greatly.
d. Spacing of studs can help (going from 400mm o.c to 600mm o.c can increase STC by 1-2
points)
Discuss the absorption as it relate to sound transmission through GWB. - Answers -Absorption
Capacity: Only effective when coupled with staggered studs or resilient channel (waste of
money to stuff insulation in rigid wall assembly for the purpose of increasing STC rating).
IF coupled with staggered studs or resilient channel - absorptive material can add up to 10
points to STC
What is a Firestop? - Answers -Firestop:
A system consisting of a material, component and means of support used to fill gaps between
fire separations or between fire separations and other assemblies, or used around items that
wholly or partially penetrate a fire separation (NBC definition)
3|Page
, What is a Fire Block? - Answers -Fire Block:
A material, component or system that restricts the spread of fire within a concealed space or
from a concealed space to an adjacent space.
What are Firestops tested to (what standard)? - Answers -Tested to ULC-S101 - 'Fire endurance
tests of building construction and materials'
List some firestopping components: - Answers -2. Intumescents (swell when exposed to heat),
3. Mineral fibres, silicone, rubber, cementitious mortar.
List the effects that stud material and spacing has on the assemblys FRR. - Answers -Type of stud
has no effect (steel vs wood), arrangement of studs has no effect (double vs single)
Insulation Basics - what is the next best insulator besides a vacuum?
What are insulating pockets in a material designed to create a balance between? - Answers -Air.
Most insulation is designed to create air pockets that are large enough to prevent conduction
and small enough to prevent convection
4|Page
UPDATED QUESTIONS AND VERIFIED 100% SOLUTIONS (2026/2027)
GRADE: A+|STATUS: GUARANTEED PASS
What is a Vapour Barrier? - Answers -Vapour Barriers:
Material of low vapour permeance installed as close as possible to the warm side of an
insulated assembly. They prevent moisture from entering a building to where it could condense
into a liquid.
What is a Mat foundation? What is a Floating Foundation? - Answers -Mat Foundation:
Used when the allowable bearing capacity of a foundation soil is low relative to building loads
and interior column footings become so large that it becomes more economical to merge them
into a single slab
Floating foundation:
Used in yielding soil, has for its footing a mat placed deep enough that the weight of the
excavated soil is equal to or greater than the weight of construction supported
In pole foundations, what does the required embedment length depend on? - Answers -
Required embedment length depends on:
-Slope of site
-Subsurface soil conditions
-Pole spacing
-Seismic zone
-Unsupported height of poles
1|Page
,What are the 2 principle types of deep foundations? Explain each type. - Answers -Pile
Foundation:
System of end bearing or friction piles, pile caps, and tie beams for transferring building loads
down to a suitable bearing stratum
Caisson Foundation:
CIP/plain or reinforced concrete piers formed by boring with a large auger or excavating and
filling with concrete (also called drilled piles/piers)
What are the 4 principle control layers in a wall? - Answers -Rain Control - ie cladding
Air Control - ie air barrier
Vapour Control - ie vapour barrier
Thermal Control - ie insulation
Discuss mass as it relate to sound transmission through GWB. - Answers -Mass (more
specifically, density)
Mass reduces sound transmission (more dense=better STC)
a. Doubling GWB weight can add 10 points to STC rating (go by weight, not thickness - have to
be sure because test data could be outdated)
b. Increase mass by adding more layers of GWB (from 1 to 2)
c. DONT add internal layer of GWB to increase STC, this actually lowers STC (it creates another
rigid connection which makes any absorptive material useless, and the second layer reduces the
depth of the wall cavity (more cavity depth=more STC)
2|Page
,Discuss the separation of layers as it relate to sound transmission through GWB. - Answers -
Separation of Layers: Air space increase transmission loss
a. Staggered Stud partitions reduce sound transmission between adjacent rooms
b. Double studs achieves similar effect to staggered studs.
c. Resilient Channel (metal) to one face of a single row of studs increases STC greatly.
d. Spacing of studs can help (going from 400mm o.c to 600mm o.c can increase STC by 1-2
points)
Discuss the absorption as it relate to sound transmission through GWB. - Answers -Absorption
Capacity: Only effective when coupled with staggered studs or resilient channel (waste of
money to stuff insulation in rigid wall assembly for the purpose of increasing STC rating).
IF coupled with staggered studs or resilient channel - absorptive material can add up to 10
points to STC
What is a Firestop? - Answers -Firestop:
A system consisting of a material, component and means of support used to fill gaps between
fire separations or between fire separations and other assemblies, or used around items that
wholly or partially penetrate a fire separation (NBC definition)
3|Page
, What is a Fire Block? - Answers -Fire Block:
A material, component or system that restricts the spread of fire within a concealed space or
from a concealed space to an adjacent space.
What are Firestops tested to (what standard)? - Answers -Tested to ULC-S101 - 'Fire endurance
tests of building construction and materials'
List some firestopping components: - Answers -2. Intumescents (swell when exposed to heat),
3. Mineral fibres, silicone, rubber, cementitious mortar.
List the effects that stud material and spacing has on the assemblys FRR. - Answers -Type of stud
has no effect (steel vs wood), arrangement of studs has no effect (double vs single)
Insulation Basics - what is the next best insulator besides a vacuum?
What are insulating pockets in a material designed to create a balance between? - Answers -Air.
Most insulation is designed to create air pockets that are large enough to prevent conduction
and small enough to prevent convection
4|Page
