ROOFNOW™ Roofing Glossary — Master Index
The ROOFNOW™ Roofing Glossary provides standardized, neutral definitions of roofing terminology, technical concepts, building-science principles, climate behaviors, and historical roofing terms used across Canada. This index supports clear understanding of roofing language and forms part of the structured ROOFNOW™ knowledge ecosystem.
How This Glossary Works
Entries are organized alphabetically. Each term is defined in clear, plain language and reflects established principles of roofing science, material behavior, and Canadian climate considerations. New terms are added regularly as part of the ongoing editorial process.
A — Terms
- A-Frame Roof
- Above-Sheathing Ventilation
- Abrasion Resistance
- Absorption Rate
- Accelerated Aging
- Acoustic Underlayment
- Acid Rain Exposure
- Active Ventilation
- Adhesive Strip
- Adverse Weather Load
- Aerodynamic Lift
- Aged Roof Surface
- Air Barrier
- Air Leakage Path
- Algae Staining
- Aluminum Flashing
- Ambient Roof Temperature
- Anti-Capillary Groove
- Anti-Siphon Channel
- Architectural Shingle
- Asphalt Composition
- Asphalt Shingle Granules
- Attic Bypass
- Attic Pressurization
- Attic Ventilation
B — Terms
- Back-Nailing
- Balanced Ventilation
- Ballasted Roof
- Barometric Pressure Effect
- Base Flashing
- Base Sheet
- Batten System
- Beam Loading
- Binding Failure
- Bitumen Layer
- Blistering
- Blow-Off Resistance
- Bond Strength
- Boot Flashing
- Bowing Deck
- Breaker Strip
- Breathability Rating
- Buckling
- Building Envelope
- Bypass Venting
C — Terms
- Cap Flashing
- Cap Sheet
- Capillary Action
- Canadian Climate Load
- Catalytic Coating
- Cedar Shake Weathering
- Cellular Ventilation
- CertainTeed Profile
- Chimney Saddle
- Cladding
- Class A Fire Rating
- Climate Adaptation
- Climate Load
- Closed-Cut Valley
- Coated Steel Panel
- Cold Climate Roof
- Cold Joints
- Condensation Cycle
- Conductive Heat Transfer
- Continuous Ridge Vent
D — Terms
- Deck Deflection
- Decking
- Deflection Load
- Dimensional Stability
- Drip Edge
- Drainage Plane
E — Terms
- Edge Fastening
- Effective Ventilation Area
- Electro-Galvanized Steel
- Energy Transfer
- Expansion/Contraction
F — Terms
- Fascia
- Fastener Back-Out
- Flashings
- Freeze-Thaw Cycling
- Frost Lines
G — Terms
- G90 Galvanized Coating
- Galvanic Protection
- Gauge Thickness
- Granule Loss
H — Terms
- Heat Aging
- Historic Tin Roofing
- Hot Roof Design
- Hurricane Nailing
I — Terms
- Ice Damming
- Ice Shedding
- Impact Resistance
- Infiltration
M — Terms
- Mechanical Fastening
- Metal Interlock System
- Moisture Bypass
R — Terms
- Rafter Loading
- Ridge Vent
- Roof Pitch
- Runoff Rate
S — Terms
- Shear Stress
- Soffit Vent
- Snow Drift Formation
- Snow Load
V — Terms
- Vapour Barrier
- Vapour Diffusion
- Vertical Airflow
- Ventilation Ratio
Z — Terms
- Zone 1 Roof Conditions
- Zone 2 Snow Load
- Zone 3 Wind Exposure
Ongoing Expansion
The glossary continues to expand as new roofing terminology, climate concepts, and technical definitions are incorporated into the ROOFNOW™ knowledge network. All updates are reflected in the Content Update Log.
This Master Glossary defines the roofing vocabulary used throughout the ROOFNOW™ educational ecosystem.