Table of Contents
Task B-5 Prepares roof for replacement
Task descriptor
Roofers prepare a specific area of the roof to facilitate the removal of the existing roofing system and to ensure the replacement system can be installed efficiently.
B-5.01 Protects surrounding area
B-5.01 Protects surrounding area
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| B-5.01.01P |
identify areas where damage may occur from reroofing process |
areas where damage may occur from reroofing process are identified |
| B-5.01.02P |
verify air intake mechanical equipment is shut off as required |
air intake mechanical equipment is shut off as required to prevent fumes from entering building |
| B-5.01.03P |
verify rooftop gas and electrical lines are disconnected or powered down when required |
rooftop gas and electrical lines are disconnected or powered down when required |
| B-5.01.04P |
select temporary covers to protect items |
temporary covers are selected according to items being protected |
| B-5.01.05P |
select and use devices or hardware to secure temporary covers |
devices or hardware are selected to secure temporary covers according to items being protected |
Range of variables
- areas include: windows, walls, skylights, photovoltaic panels, mechanical equipment, parking lots, entrances, exits, public property
- temporary covers include: tarps, polyethylene, safety nets, plywood, powerline protection, interior ceiling containment
- devices or hardware include: tapes, ropes, tie-down straps, fasteners, shrink wrap, ratchet straps
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| B-5.01.01L |
demonstrate knowledge of procedures to protect surrounding areas for reroofing process |
describe areas where damage may occur from reroofing process |
| identify types of temporary covers used to protect items |
| identify types of devices or hardware used to secure temporary covers |
| describe importance of shutting down utilities in work area |
| identify damages that could result in not protecting areas properly |
Range of variables
- areas include: windows, walls, skylights, photovoltaic panels, mechanical equipment, parking lots, entrances, exits, public property
- temporary covers include: tarps, polyethylene, safety nets, plywood, powerline protection, interior ceiling containment
- devices or hardware include: tapes, ropes, tie-down straps, fasteners, shrink wrap, ratchet straps
- damages include: broken glass, fumes, dust and debris infiltration, staining, fire, water, landscaping, building interior components
B-5.02 Removes loose debris
B-5.02 Removes loose debris
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| B-5.02.01P |
identify debris to be removed |
debris to be removed is identified |
| B-5.02.02P |
select removal device |
removal device is selected according to debris that needs to be removed |
| B-5.02.03P |
gather, store and dispose of debris |
debris is gathered, stored and disposed of in designated containers according to environmental and jurisdictional regulations |
| B-5.02.04P |
identify hazardous materials |
hazardous materials are identified, and client and project authority notified |
Range of variables
- debris includes: vegetation, ballast/aggregate, organic and inorganic waste
- removal devices include: shovels, brooms, power vacuums, wheelbarrows, power sweeper, power carts
- hazardous materials include: asbestos materials, lead, mould, droppings/feces, coal tar pitch, used needles
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| B-5.02.01L |
demonstrate knowledge of procedures to remove loose debris |
describe procedure to remove loose debris |
| identify types of loose debris and hazardous materials that may need to be removed |
| identify types of removal devices used to remove loose debris |
| identify types of containers used to gather, store and dispose of loose debris |
| B-5.02.02L |
demonstrate knowledge of regulatory requirements pertaining to disposal of hazardous materials |
identify standards, codes and regulations pertaining to gathering, storing and disposal of hazardous materials |
Range of variables
- debris includes: vegetation, ballast/aggregate, organic and inorganic waste
- hazardous materials include: asbestos materials, lead, mould, droppings/feces, coal tar pitch, used needles
- removal devices include: shovels, brooms, power vacuums, wheelbarrows, power sweeper, power carts
B-5.03 Removes roofing and flashings
B-5.03 Removes roofing and flashings
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| B-5.03.01P |
select and use tools and equipment |
tools and equipment are selected and used according to task and type of roof |
| B-5.03.02P |
identify potential hazards |
potential hazards are identified |
| B-5.03.03P |
select removal technique |
removal technique is selected according to type and size of roof |
| B-5.03.04P |
remove components |
components are removed according to industry practices |
| B-5.03.05P |
select refuse disposal method |
refuse disposal method is selected according to height of roof |
| B-5.03.06P |
gather, store and dispose of debris |
debris is gathered, stored and disposed of in designated containers according to environmental and jurisdictional regulations |
| B-5.03.07P |
install temporary drainage |
temporary drainage is installed in work area according to product being installed and task |
| B-5.03.08P |
seal roof temporarily using materials |
roof is temporarily sealed using materials in event of sudden weather changes or deteriorated roof decks |
Range of variables
- tools and equipment include: pry-bars, hammers, stripping spades, roof cutters, axes, tear-off machine, shovels, magnetic bar
- potential hazards include: deteriorated deck, fasteners, electrical wiring, gas and service lines, roof openings
- components include: flashings, ballast, membranes, shingles, clamping rings, insulation, construction materials
- refuse disposal method includes: garbage chute, hoisted garbage box
- temporary drainage includes:drop drains, emergency scuppers, pumps
- materials include: polyethylene, compatible membrane, mastics, tarps
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| B-5.03.01L |
demonstrate knowledge of roofing systems and their components, characteristics and applications |
define terminology associated with roofing systems and their components |
| identify types of roofing systems and their components, and describe their characteristics and applications |
| B-5.03.02L |
demonstrate knowledge of procedures to remove roofing and flashings |
identify tools and equipment used to remove roofing and flashings, and describe their procedures for use |
| describe procedures to remove roofing and flashings |
| identify types of materials used to seal a roof temporarily |
| describe procedures for installing temporary drainage in a work area |
| describe effects of environmental conditions and its impacts on removal of roof coverings |
| explain roof removal sequence |
| explain roof removal techniques |
| identify potential hazards while removing roof and flashing |
| describe procedures for removal and disposal of materials |
Range of variables
- components include: flashings, ballast, membranes, shingles, clamping rings, insulation, construction materials
- types of roofing systems include: low slope, steep slope
- tools and equipment include: pry-bars, hammers, stripping spades, roof cutters, axes, tear-off machine, shovels, magnetic bar
- materials include: polyethylene, compatible membrane, mastics, tarps
- temporary drainage includes:drop drains, emergency scuppers, pumps
- potential hazards include: deteriorated deck, fasteners, electrical wiring, gas and service lines, roof openings
B-5.04 Prepares roof substrate
B-5.04 Prepares roof substrate
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| B-5.04.01P |
verify that roof substrate is clean and free of protruding fasteners and foreign materials |
roof substrate is clean and free of protruding fasteners and foreign materials |
| B-5.04.02P |
verify roof substrate is securely fastened |
roof substrate is securely fastened |
| B-5.04.03P |
visually inspect roof substrate for defects |
roof substrate is visually inspected for defects |
| B-5.04.04P |
identify structural damage |
structural damage is identified |
| B-5.04.05P |
install temporary barricade |
temporary barricade is installed to maintain integrity of work space |
| B-5.04.06P |
repair and replace damaged roof substrate |
damaged roof substrate is repaired and replaced according to NBC |
Range of variables
- roof substrates include: decks (wood, steel, concrete), existing roof composition (insulation, cover boards, membranes, membrane flashings)
- defects include: gouges, wet insulation, dents, voids, rot, spalling concrete, corrosion, holes, protruding fasteners
- structural damage includes: rusted metal deck, rotten wood deck
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| B-5.04.01L |
demonstrate knowledge of roof substrates and their components, characteristics and applications |
define terminology associated with roof substrates and their components |
| identify types of roof substrates and their components, and describe their characteristics and applications |
| B-5.04.02L |
demonstrate knowledge of procedures to prepare roof substrates |
describe procedures to prepare roof substrates |
| identify types of structural damage |
| identify types of roof substrate defects |
| describe procedures to repair and replace damaged roof substrate |
| describe procedures to secure loose roof substrate components |
Range of variables
- roof substrates include: decks (wood, steel, concrete), existing roof composition (insulation, cover boards, membranes, membrane flashings)
- roof substrate components include: insulation, cover boards, membranes, membrane flashings
- structural damage includes: rusted metal deck, rotten wood deck
- defects include: gouges, wet insulation, dents, voids, rot, spalling concrete, corrosion, holes, protruding fasteners
B-5.05 Performs minor adjustments to penetrations, curbs and parapets
B-5.05 Performs minor adjustments to penetrations, curbs and parapets
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| B-5.05.01P |
select and use tools and equipment |
tools and equipment are selected and used according to task |
| B-5.05.02P |
verify thickness of new roofing system |
thickness of new roofing system is verified to ensure penetration, curb and parapet elevation requirements are according to design authority specifications |
| B-5.05.03P |
verify elevations of existing penetrations, curbs and parapets |
elevations of existing penetrations, curbs and parapets are verified to determine if adjustments are required according to design authority and manufacturers’ specifications |
| B-5.05.04P |
verify if other trades are required to facilitate raising of penetrations, curbs and parapets |
raising of penetrations, curbs and parapets is determined according to new roof thickness and site authority is notified of required changes |
| B-5.05.05P |
select and install materials to extend elevations of penetrations, curbs and parapets |
materials to extend elevations of penetrations, curbs and parapets are selected and installed according to field measurements and design authority specifications |
| B-5.05.06P |
check roof drains |
roof drains are checked to ensure they are at low point and to facilitate positive drainage |
| B-5.05.07P |
alter height of drain |
height of drain is altered using a retrofit drain or existing drain assembly to ensure they are at low point and to facilitate positive drainage |
Range of variables
- tools and equipment include: hammers, saws, drills
- materials include: dimensional lumber, plywood, site-specific plumbing materials, fasteners
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| B-5.05.01L |
demonstrate knowledge of penetrations, curbs and parapets, their characteristics and applications |
define terminology associated with penetrations, curbs and parapets |
| identify penetrations, curbs and parapets, and describe their characteristics and applications |
| B-5.05.02L |
demonstrate knowledge of procedures to perform minor adjustments to penetrations, curbs and parapets |
identify tools and equipment used to perform minor adjustments to penetrations, curbs and parapets, and describe their procedures for use |
| describe procedures used to perform minor adjustments to penetrations, curbs and parapets |
| describe calculations used to determine thickness of new roofing system |
| identify materials used to extend elevations of penetrations, curbs and parapets |
| describe procedures to alter height of drains |
Range of variables
- tools and equipment include: hammers, saws, drills
- materials include: dimensional lumber, plywood, site-specific plumbing materials, fasteners
Task B-6 Prepares deck for roof installation
Task descriptor
Before installing a new roofing system or replacing an older roofing system, roofers need to ensure that the deck is clean, dry, free of defects and secured in place. The performance of the roof depends on the integrity of the deck and its components. Decks need to be prepared for roof replacement and for new construction.
B-6.01 Inspects deck
B-6.01 Inspects deck
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| B-6.01.01P |
visually inspect deck for defects and determine if clean-up or repairs are required |
defects, clean-up or repairs are identified, determined and documented according to NBC |
| B-6.01.02P |
determine responsibility for clean-up or repairs |
responsibility for clean-up or repairs is determined according to contract |
| B-6.01.03P |
verify deck is fully cured, secured and crimped, or fastened |
deck is verified to be fully cured, secured and crimped, or fastened according to visual inspection and authority sign-off |
| B-6.01.04P |
verify uncut deck openings are clearly marked |
uncut deck openings are clearly marked and communicated to contractor or other trades according to design authority specifications |
| B-6.01.05P |
verify existing deck openings are fully supported and securely covered |
existing deck openings are fully supported and securely covered according to NBC |
Range of variables
- defects include: deterioration, irregularities, deflection of deck, uncured and spalling concrete, corrosion
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| B-6.01.01L |
demonstrate knowledge of roof decks, their characteristics and applications |
define terminology associated with roof decks |
| identify types of roof decks, and describe their characteristics and applications |
| B-6.01.02L |
demonstrate knowledge of procedures to inspect deck |
identify types of roof deck defects and their effects on roof performance |
| describe inspection requirements |
Range of variables
- types of roof decks include: wood, concrete, steel, asbestos
- defects include: deterioration, irregularities, deflection of deck, uncured and spalling concrete, corrosion
B-6.02 Cleans surface of deck
B-6.02 Cleans surface of deck
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| Reference Code |
Performance Criteria |
Evidence of Attainment |
| B-6.02.01P |
determine amount of deck to be cleaned |
amount of deck to be cleaned is determined according to amount of roofing to be installed that day considering factors |
| B-6.02.02P |
select and use tools and equipment |
tools and equipment are selected and used according to cleaning technique |
| B-6.02.03P |
remove materials |
materials are removed and placed in designated area |
| B-6.02.04P |
remove debris |
debris is removed to a designated disposal bin or area |
| B-6.02.05P |
remove and dispose of contaminants |
contaminants are removed and disposed of according to WHMIS |
| B-6.02.06P |
limit access to cleaned area |
access to cleaned area is limited using barriers |
Range of variables
- factors include: environmental conditions, labour, other trades, new roof or re-roof
- tools and equipment include: shovels, brooms, rags, air compressors, blowers, scrapers
- materials include: insulation, membranes, fasteners, z-girt
- debris includes: paper, sawdust, concrete, aggregate, construction materials
- contaminants include: grease, oil, adhesive spills
- barriers include: ropes, delineators, plastic cones, caution tape
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| B-6.02.01L |
demonstrate knowledge of roof decks, their characteristics and applications |
identify types of roof decks, and describe their characteristics and applications |
| B-6.02.02L |
demonstrate knowledge of procedures to clean roof decks |
identify tools and equipment used to clean roof decks, and describe their procedures for use |
| describe procedures to clean roof decks |
| determine when, how much, and extent of cleaning required |
| describe procedures used to remove and dispose of contaminants |
| describe types of barriers used to limit access to cleaned areas |
Range of variables
- types of roof decks include: wood, concrete, steel, Stramit, asbestos
- tools and equipment include: shovels, brooms, rags, air compressors, blowers, scrapers
- contaminants include: grease, oil, adhesive spills
- barriers include: ropes, delineators, plastic cones, caution tape
B-6.03 Verifies placement of roof penetrations, curbs and parapets
B-6.03 Verifies placement of roof penetrations, curbs and parapets
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| B-6.03.01P |
confirm location and dimensions of roof penetrations, curbs and parapets |
location and dimensions of roof penetrations, curbs and parapets are confirmed according to job specifications and through communication with trades responsible |
| B-6.03.02P |
measure elevations of penetrations, curbs and parapets |
elevations of penetrations, curbs and parapets are measured and verified to determine if adjustments are required according to design authority and manufacturers’ specifications |
| B-6.03.03P |
confirm secure installation of roof penetrations, curbs and parapets |
secure installation of roof penetrations, curbs and parapets are confirmed according to visual inspection |
| B-6.03.04P |
verify that materials used for penetrations, curbs and parapets are compatible with roofing system |
materials used for penetrations, curbs and parapets compatible with roofing systems are verified according to design authority specifications |
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| B-6.03.01L |
demonstrate knowledge of procedures to verify placement of roof penetrations, curbs and parapets |
describe procedure to verify placement of roof penetrations, curbs and parapets |
| identify required penetrations and parapets |
| identify elevation and fastening requirements |
| describe clearances and placement of roof penetrations, curbs and parapets |
| identify required components for penetrations |
| describe importance of compatibility of materials used for penetrations, curbs and parapets with roofing system |
Range of variables
- components include: utility lines, flashings, chimney flashings
B-6.04 Dries deck
B-6.04 Dries deck
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| Reference Code |
Performance Criteria |
Evidence of Attainment |
| B-6.04.01P |
determine amount of deck to be dried |
amount of deck to be dried is determined according to amount of roofing to be installed that day considering factors |
| B-6.04.02P |
determine method of drying |
method of drying is determined according to composition of deck, type and amount of moisture present |
| B-6.04.03P |
remove excess moisture |
excess moisture is removed using tools and equipment |
| B-6.04.04P |
remove remaining moisture |
remaining moisture is removed using methods of drying |
| B-6.04.05P |
confirm deck is dry |
visual or tactile inspection is performed to confirm deck is dry to allow application of roofing |
| B-6.04.06P |
temporarily cover dried deck |
dried deck is covered with tarps temporarily to protect from further exposure to moisture |
Range of variables
- factors include: environmental conditions, labour, other trades
- methods of drying include: vacuuming, dry mopping, torching, blowing
- moisture includes: ice, snow, water
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| B-6.04.01L |
demonstrate knowledge of procedures to dry roof deck |
identify methods of drying, and their hazards |
| describe effect of environmental conditions on drying time |
| explain procedures and factors considered to determine how much roof deck to dry at one time |
| explain procedure to determine when deck is dry enough to allow application of roofing |
| explain importance of limiting deck exposure to moisture |
| explain procedure to install tarps |
Range of variables
- methods of drying include: vacuuming, dry mopping, torching, blowing
- factors include: environmental conditions, labour, other trades
- moisture includes: ice, snow, water